lmms-lab/CSBench_Assertion · Datasets at Hugging Face

ID int64 383 2.08k	Split stringclasses 1 value	Domain stringclasses 4 values	SubDomain stringclasses 24 values	Format stringclasses 1 value	Tag stringclasses 2 values	Language stringclasses 1 value	Question stringlengths 28 336	Answer stringclasses 2 values	Explanation stringlengths 29 771 ⌀
1,539	Test	Computer Network	Application Layer	Assertion	Knowledge	English	One of the main differences between TCP and UDP is that TCP is a byte-stream-oriented protocol.	True	null
1,540	Test	Computer Network	Application Layer	Assertion	Knowledge	English	In DNS, the record responsible for resolving domain names into IP addresses is the PTR record.	False	null
1,541	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The SMTP protocol is used for remote login.	False	null
1,542	Test	Computer Network	Application Layer	Assertion	Knowledge	English	In the HTTP protocol, the DELETE request method is used to submit data to the server.	False	null
1,543	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The function of the DHCP protocol is to perform routing selection.	False	null
1,544	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The DHCP protocol belongs to the Network Layer.	False	null
1,545	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The transport layer protocol used by the DNS protocol is UDP.	True	null
1,546	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The transport layer protocol used by the DHCP protocol is UDP.	True	null
1,547	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The DHCP protocol is primarily used to assign IP addresses to users within a local area network (LAN).	True	null
1,548	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The user submits a service request, and the network transmits the user's request to the server. The server processes the user's request, performs the required operations, and sends the results back to the user. This working pattern is known as the C/S (Client/Server) model.	True	null
1,549	Test	Computer Network	Application Layer	Assertion	Knowledge	English	One of the main features of the File Transfer Protocol (FTP) is that it allows clients to specify the type and format of a file.	True	null
1,550	Test	Computer Network	Application Layer	Assertion	Knowledge	English	The protocol in which control information is transmitted out-of-band is FTP.	True	null
1,551	Test	Computer Network	Application Layer	Assertion	Knowledge	English	An FTP user sent a LIST command to retrieve the file list from the server, at which point the server should transmit the list through port 21.	False	null
1,552	Test	Computer Network	Application Layer	Assertion	Knowledge	English	When a computer downloads a file from an FTP server, the five encapsulation transformations performed on the data on that FTP server are data, segments, datagrams, frames, and bits.	True	null
1,553	Test	Computer Network	Application Layer	Assertion	Knowledge	English	SMTP is based on the UDP protocol of the transport layer, POP3 is based on the UDP protocol of the transport layer.	False	null
1,554	Test	Computer Network	Application Layer	Assertion	Knowledge	English	Some ports of TCP and UDP are reserved for specific applications. The port number reserved for HTTP is TCP port 80.	True	null
1,555	Test	Computer Network	Application Layer	Assertion	Knowledge	English	An HTTP request message using the PUT method only requires the web server to respond to the HTTP message, without the need to return the requested object.	False	null
1,556	Test	Computer Network	Application Layer	Assertion	Reasoning	English	In the FTP working model, the well-known port number used by the server for the control connection TCP connection is 21.	True	In the FTP (File Transfer Protocol) working model, the well-known port number used for the TCP connection for control communication on the server side is indeed 21. FTP has two main connections: the control connection and the data connection. The control connection is used to transmit FTP commands and responses, while the data connection is used to transfer actual data. The control connection always uses port 21, which is the standard port number for the FTP protocol.
1,956	Test	Operating System	Overview	Assertion	Knowledge	English	An operating system is software that manages hardware.	False	null
1,957	Test	Operating System	Overview	Assertion	Knowledge	English	The resources that an operating system should manage include memory, processors, and external devices, etc., whereas the source program is not a resource that should be managed by the operating system.	True	null
1,958	Test	Operating System	Overview	Assertion	Knowledge	English	The issue of concern for operating systems is the design and provision of an interface between user programs and the hardware system.	False	null
1,959	Test	Operating System	Overview	Assertion	Knowledge	English	The basic function of an operating system is to provide a user interface to facilitate user interaction.	False	null
1,960	Test	Operating System	Overview	Assertion	Knowledge	English	The two most fundamental characteristics of modern operating systems are concurrency and sharing.	True	null
1,961	Test	Operating System	Overview	Assertion	Knowledge	English	The interface provided by the operating system to programmers is the library function.	False	null
1,962	Test	Operating System	Overview	Assertion	Knowledge	English	The basic characteristics of multiprogramming include concurrency, sharing, indeterminacy, and restrictiveness, but restrictiveness is not one of these characteristics.	False	null
1,963	Test	Operating System	Overview	Assertion	Knowledge	English	The main disadvantage of batch processing systems is the lack of interactivity.	True	null
1,964	Test	Operating System	Overview	Assertion	Knowledge	English	The basic characteristics of multiprogramming include concurrency, independence, mutual exclusion, and shareability, among which shareability is not a basic characteristic of multiprogramming.	False	null
1,965	Test	Operating System	Overview	Assertion	Knowledge	English	The goal of a time-sharing system is to respond to users relatively quickly.	True	null
1,966	Test	Operating System	Overview	Assertion	Knowledge	English	After the computer distinguishes between kernel mode and user mode instructions, the transition from kernel mode to user mode is completed after the execution of the operating system program, while the transition from user mode to kernel mode is accomplished by the hardware.	True	null
1,967	Test	Operating System	Overview	Assertion	Knowledge	English	When the CPU is in kernel mode, the only instruction it can execute is the "supervisor call" instruction.	False	null
1,968	Test	Operating System	Overview	Assertion	Knowledge	English	The task of the BIOS is to check if the partition table is correct, determine which partition is the active partition, and at the end of the process, load the boot sector (operating system boot sector) of that partition into memory for execution.	False	null
1,969	Test	Operating System	Overview	Assertion	Knowledge	English	Secondary storage is a resource that should not be managed by the operating system.	False	null
1,970	Test	Operating System	Overview	Assertion	Knowledge	English	Users can interact with the computer through two methods: command-line interface and functions.	False	null
1,971	Test	Operating System	Overview	Assertion	Knowledge	English	The operating system provides users with a command interface, which can be further divided into a batch user interface and a graphical interface, to facilitate users to directly or indirectly control their jobs.	False	null
1,972	Test	Operating System	Overview	Assertion	Knowledge	English	The fundamental characteristics of multiprogramming include concurrency, sharing, and mutual exclusion, but do not include sequentiality.	True	null
1,973	Test	Operating System	Overview	Assertion	Knowledge	English	Interrupt handling is a function that must be provided by the operating system.	True	null
1,974	Test	Operating System	Overview	Assertion	Knowledge	English	In the operating system, the instruction that can only be executed in kernel mode is the fetch instruction.	False	null
1,975	Test	Operating System	Overview	Assertion	Reasoning	English	An important performance aspect of a time-sharing system is the system's response time. Improving the operating system's priority scheme and non-preemptive scheduling algorithms can be beneficial in enhancing the system's response time.	True	Using a priority-based + non-preemptive scheduling algorithm allows important jobs/processes to quickly receive system responses through high priority, while ensuring that less critical jobs/processes will not be indefinitely delayed in receiving system responses under non-preemptive scheduling. Such a balanced design is conducive to improving system response time. Increasing the time slice will delay the system response time: static paging management and reentrant code are unrelated to system response time.
1,976	Test	Operating System	Overview	Assertion	Reasoning	English	In a time-sharing system, the most critical issue to ensure that multiple processes can interact with the system in a timely manner is to allow all ready processes to run within a short period of time. When the number of ready processes is 100, to ensure that the response time does not exceed 2s, the maximum time slice should be 20ms.	True	The response time must not exceed 2s, meaning that all processes must be responded to within 2s. Therefore, the maximum time slice is 2s/100=20ms.
1,977	Test	Operating System	Overview	Assertion	Reasoning	English	After an interrupt occurs, the program that enters the interrupt handling belongs to the operating system software.	True	When an interrupt or exception occurs, hardware implementation ensures that the CPU running in user mode is immediately switched to kernel mode. If the interrupt occurs while a user program is running, the system transitions from user mode to supervisor mode to handle the interrupt; if a low-level interrupt is interrupted, it remains in supervisor mode, as user programs can only run in user mode. Therefore, the program that enters the interrupt handling must be an OS program. The interrupt program itself may be a user program, but the interrupt handling program must be an OS program.
1,978	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	The fundamental difference between a process and a program is their static and dynamic characteristics.	True	null
1,979	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	At any given moment, a change in the state of one process does not necessarily cause a change in the state of another process.	True	null
1,980	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	A process's basic state, which can transition from the other two basic states, must be the blocked state.	False	null
1,981	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	The PCB is the unique identifier of a process; global variables are not part of the PCB.	True	null
1,982	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	In GUI-based debugging programs, multi-threading is not a strength, as it uses different threads to handle user input, computation, and tracking operations separately.	False	null
1,983	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	Two cooperating processes are unable to exchange data using a message-passing system.	False	null
1,984	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	A process will inevitably cause a context switch when it transitions from the running state to the ready state.	True	null
1,985	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	When a process is waiting for a signal from a cooperating process, it is in a non-blocking state.	False	null
1,986	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	In a single-processor multiprocess system, when a process occupies the processor and the duration of its occupancy is determined by the corresponding code length of the process.	False	null
1,987	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	The round-robin scheduling algorithm is favorable for CPU-intensive jobs, but not for I/O-intensive jobs.	False	null
1,988	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	The First-Come, First-Served scheduling algorithm is absolutely preemptive.	False	null
1,989	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	The P operation may lead to the creation of a new process.	False	null
1,990	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	Among the four necessary conditions for deadlock, the one that cannot be broken is the mutual exclusion of resources.	True	null
1,991	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	An unsafe state is a deadlock state.	False	null
1,992	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	During deadlock detection, what is checked is the resource allocation graph.	True	null
1,993	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	The Deadlock Theorem is a method used for the detection of deadlocks.	True	null
1,994	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	A process image is a combination of the PCB structure with the program and data.	True	null
1,995	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	At any given moment, a change in the state of one process must cause a change in the state of another process.	False	null
1,996	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	In a single-processor system, if there are 10 processes present at the same time, then at most 10 processes can be in the ready queue.	False	null
1,997	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	After the completion of an I/O operation requested by a system process, the process state will change from blocked to ready.	True	null
1,998	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	System threads in the dynamic DLL library, when called by different processes, are the same threads.	True	null
1,999	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	In a computer system, the maximum number of processes is primarily limited by the number of users.	False	null
2,000	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	Time-sharing operating systems often adopt the Shortest Job First scheduling algorithm to serve users.	False	null
2,001	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	In operating systems, the reason for synchronizing concurrent processes is because processes must be completed within a limited time frame.	False	null
2,002	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	The program defines a shared data structure and all operations of various processes on that data structure.	False	null
2,003	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	When a waiting process is awakened by the V operation, the awakened process becomes ready.	True	null
2,004	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	There are 5 concurrent processes in a system that involve the same variable A, and the critical section related to variable A consists of 5 critical sections.	True	null
2,005	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	Mailbox communication is a direct method of communication.	False	null
2,006	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	In a system with three concurrent processes that all require four identical resources, the minimum number of resources to ensure that the system will not experience deadlock is 10.	True	null
2,007	Test	Operating System	Processes and Threads	Assertion	Knowledge	English	One of the prerequisites for introducing multiprogramming technology is that the system has time-sharing capabilities.	False	null
2,008	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	Introducing threads can enhance the degree of concurrent execution of a program, thereby further improving system efficiency.	True	A thread is a relatively independent unit of execution within a process, but it cannot run independently of the process and can only operate within it. The introduction of threads is to reduce the time and space overhead during program execution. A process can contain one or more threads.
2,009	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	When the time slice expires, the process transitions from the running state to the ready state.	True	When a process's time slice expires, the process transitions from the running state to the ready state, waiting for the arrival of the next time slice.
2,010	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	To minimize the average turnaround time, jobs with shorter runtimes should be executed first. Therefore, the execution order for the minimum average turnaround time is to execute Job 1 (2h), Job 3 (3h), Job 2 (5h), that is, in the order of Job 1, Job 3, Job 2.	True	When running in a uniprogramming mode on the same processor, to achieve the shortest average turnaround time, the Shortest Job First scheduling algorithm tends to be effective. Regarding this question: The average turnaround time for option A is (2+7+10)/3h = 19/3h; the average turnaround time for option B is (3+8+10)/3h = 7h. The average turnaround time for option C is (5+7+10)/3h = 22/3h; the average turnaround time for option D is (2+5+10)/3h = 17/3h.
2,011	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	The round-robin scheduling algorithm is absolutely preemptive.	True	The Round-Robin scheduling algorithm operates on a fixed time quantum; once the time is up, regardless of whether the task is completed, the current process must be suspended to schedule a new process. Therefore, it is determined by the time quantum and is absolutely preemptive. Both the Priority scheduling algorithm and the Shortest Job First algorithm can be divided into preemptive and non-preemptive versions.
2,012	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	The scheduling algorithm with an average turnaround time of 14 is priority scheduling.	False	When these 5 batch jobs are scheduled using the Shortest Job First scheduling algorithm, the average turnaround time is [2+(2+4)+(2+4+6)+(2+4+6+8)+(2+4+6+8+10)]/5=14. This question mainly tests the reader's understanding of various priority scheduling algorithms. If solved using the method in question 18, it might take some time, but it is worthwhile as it helps to practice the basic methods. Such questions with a large amount of operations and calculations are rarely encountered in exams, so readers need not worry.
2,013	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	In process scheduling algorithms, the First-Come, First-Served (FCFS) scheduling algorithm is disadvantageous for short processes.	True	In the First-Come, First-Served scheduling algorithm, if a long process (job) arrives at the system first, it will cause many subsequent short processes (jobs) to wait for an extended period, thus disadvantaging short processes (jobs).
2,014	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	Process synchronization can be achieved without the need for semaphores.	False	In multiprogramming, the semaphore mechanism is an effective tool for implementing process synchronization and mutual exclusion. The precedence relationship of process execution essentially refers to the synchronization relationship between processes. Besides, concurrent execution of processes does not require semaphore control, hence the correct answer is D.
2,015	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	When using the PV operation synchronization mechanism, the value range of semaphore S is 2, 1, 0, and -1.	True	Since the program segment allows two processes to enter at a time, the maximum value of the semaphore is 2. With at most three processes applying, the minimum value of the semaphore is -1; therefore, the semaphore can take the values 2, 1, 0, -1.
2,016	Test	Operating System	Processes and Threads	Assertion	Reasoning	English	After acquiring resources, a process can only release them after it has finished using them; this belongs to the non-preemptive condition, which is one of the necessary conditions for deadlock.	True	After acquiring resources, a process can only release them after they have been used, meaning its resources cannot be preempted by the system. The answer is option C.
2,017	Test	Operating System	Memory Management	Assertion	Knowledge	English	In storage management, the purpose of adopting overlay and swapping techniques is to achieve main memory sharing.	False	null
2,018	Test	Operating System	Memory Management	Assertion	Knowledge	English	In segmented paging storage management, the address mapping table consists of one page table for each process and one segment table for each segment.	False	null
2,019	Test	Operating System	Memory Management	Assertion	Knowledge	English	After adopting paging or segmentation management, the physical address space provided to users remains the same.	False	null
2,020	Test	Operating System	Memory Management	Assertion	Knowledge	English	The management of the external storage swap area should primarily aim to increase the speed of swapping in and out.	True	null
2,021	Test	Operating System	Memory Management	Assertion	Knowledge	English	An operating system manages memory using a paging storage management method, where the size of the pages allocated must be the same.	True	null
2,022	Test	Operating System	Memory Management	Assertion	Knowledge	English	The storage management method unsuitable for multiprogramming systems is variable partition allocation.	False	null
2,023	Test	Operating System	Memory Management	Assertion	Knowledge	English	In segmented storage management, storage is divided into segments, with each segment being a contiguous storage area.	True	null
2,024	Test	Operating System	Memory Management	Assertion	Knowledge	English	The maximum capacity of virtual memory depends on the address space of the process.	False	null
2,025	Test	Operating System	Memory Management	Assertion	Knowledge	English	In page replacement strategies, the FIFO strategy may lead to thrashing.	False	null
2,026	Test	Operating System	Memory Management	Assertion	Knowledge	English	The foundation of the virtual storage management system is the theory of program virtuality.	False	null
2,027	Test	Operating System	Memory Management	Assertion	Knowledge	English	The main characteristic of paging virtual memory management is that it does not require loading the entire job into a contiguous area of the main memory at once.	True	null
2,028	Test	Operating System	Memory Management	Assertion	Knowledge	English	The storage management that does not produce internal fragmentation is segmented storage management.	True	null
2,029	Test	Operating System	Memory Management	Assertion	Knowledge	English	For the relocation storage management method, a relocation register should be set up throughout the entire system.	True	null
2,030	Test	Operating System	Memory Management	Assertion	Knowledge	English	The management of the external storage swap area should primarily aim to enhance system throughput.	False	null
2,031	Test	Operating System	Memory Management	Assertion	Knowledge	English	In the segmented storage management method, each segment is of equal length.	False	null
2,032	Test	Operating System	Memory Management	Assertion	Knowledge	English	Virtual storage technology is a technique to supplement external storage space.	False	null
2,033	Test	Operating System	Memory Management	Assertion	Knowledge	English	The main feature of demand paging storage management is the expansion of memory.	True	null
2,034	Test	Operating System	Memory Management	Assertion	Knowledge	English	The storage management methods of virtual storage technology include demand paging storage management.	True	null
2,035	Test	Operating System	Memory Management	Assertion	Reasoning	English	To implement virtual memory management, corresponding hardware support is required.	True	Options A and B are obviously incorrect. The size of the addressing space in option C depends on the memory access capability of the hardware, which is generally determined by the width of the address bus. Option D requires hardware and software support for the management of virtual memory, including mechanisms such as demand paging page tables, page fault interrupts, and address translation facilities.
2,036	Test	Operating System	Memory Management	Assertion	Reasoning	English	In the paging storage management scheme, static relocation can be adopted.	False	In the fixed partitioning method, once a job is loaded, its position does not change, and static relocation can be used. The other three management schemes may change the program's position during execution, and static relocation cannot meet their requirements.
2,037	Test	Operating System	Memory Management	Assertion	Reasoning	English	Single-user contiguous allocation is a storage management method that is not suitable for multiprogramming systems.	True	The single-user contiguous allocation method is only suitable for single-user, single-task operating systems and is not applicable to multiprogramming.

1,539

Test

Computer Network

Application Layer

Assertion

Knowledge

English

One of the main differences between TCP and UDP is that TCP is a byte-stream-oriented protocol.

True

null

1,540

Test

Computer Network

Application Layer

Assertion

Knowledge

English

In DNS, the record responsible for resolving domain names into IP addresses is the PTR record.

False

null

1,541

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The SMTP protocol is used for remote login.

False

null

1,542

Test

Computer Network

Application Layer

Assertion

Knowledge

English

In the HTTP protocol, the DELETE request method is used to submit data to the server.

False

null

1,543

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The function of the DHCP protocol is to perform routing selection.

False

null

1,544

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The DHCP protocol belongs to the Network Layer.

False

null

1,545

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The transport layer protocol used by the DNS protocol is UDP.

True

null

1,546

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The transport layer protocol used by the DHCP protocol is UDP.

True

null

1,547

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The DHCP protocol is primarily used to assign IP addresses to users within a local area network (LAN).

True

null

1,548

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The user submits a service request, and the network transmits the user's request to the server. The server processes the user's request, performs the required operations, and sends the results back to the user. This working pattern is known as the C/S (Client/Server) model.

True

null

1,549

Test

Computer Network

Application Layer

Assertion

Knowledge

English

One of the main features of the File Transfer Protocol (FTP) is that it allows clients to specify the type and format of a file.

True

null

1,550

Test

Computer Network

Application Layer

Assertion

Knowledge

English

The protocol in which control information is transmitted out-of-band is FTP.

True

null

1,551

Test

Computer Network

Application Layer

Assertion

Knowledge

English

An FTP user sent a LIST command to retrieve the file list from the server, at which point the server should transmit the list through port 21.

False

null

1,552

Test

Computer Network

Application Layer

Assertion

Knowledge

English

When a computer downloads a file from an FTP server, the five encapsulation transformations performed on the data on that FTP server are data, segments, datagrams, frames, and bits.

True

null

1,553

Test

Computer Network

Application Layer

Assertion

Knowledge

English

SMTP is based on the UDP protocol of the transport layer, POP3 is based on the UDP protocol of the transport layer.

False

null

1,554

Test

Computer Network

Application Layer

Assertion

Knowledge

English

Some ports of TCP and UDP are reserved for specific applications. The port number reserved for HTTP is TCP port 80.

True

null

1,555

Test

Computer Network

Application Layer

Assertion

Knowledge

English

An HTTP request message using the PUT method only requires the web server to respond to the HTTP message, without the need to return the requested object.

False

null

1,556

Test

Computer Network

Application Layer

Assertion

Reasoning

English

In the FTP working model, the well-known port number used by the server for the control connection TCP connection is 21.

True

In the FTP (File Transfer Protocol) working model, the well-known port number used for the TCP connection for control communication on the server side is indeed 21. FTP has two main connections: the control connection and the data connection. The control connection is used to transmit FTP commands and responses, while the data connection is used to transfer actual data. The control connection always uses port 21, which is the standard port number for the FTP protocol.

1,956

Test

Operating System

Overview

Assertion

Knowledge

English

An operating system is software that manages hardware.

False

null

1,957

Test

Operating System

Overview

Assertion

Knowledge

English

The resources that an operating system should manage include memory, processors, and external devices, etc., whereas the source program is not a resource that should be managed by the operating system.

True

null

1,958

Test

Operating System

Overview

Assertion

Knowledge

English

The issue of concern for operating systems is the design and provision of an interface between user programs and the hardware system.

False

null

1,959

Test

Operating System

Overview

Assertion

Knowledge

English

The basic function of an operating system is to provide a user interface to facilitate user interaction.

False

null

1,960

Test

Operating System

Overview

Assertion

Knowledge

English

The two most fundamental characteristics of modern operating systems are concurrency and sharing.

True

null

1,961

Test

Operating System

Overview

Assertion

Knowledge

English

The interface provided by the operating system to programmers is the library function.

False

null

1,962

Test

Operating System

Overview

Assertion

Knowledge

English

The basic characteristics of multiprogramming include concurrency, sharing, indeterminacy, and restrictiveness, but restrictiveness is not one of these characteristics.

False

null

1,963

Test

Operating System

Overview

Assertion

Knowledge

English

The main disadvantage of batch processing systems is the lack of interactivity.

True

null

1,964

Test

Operating System

Overview

Assertion

Knowledge

English

The basic characteristics of multiprogramming include concurrency, independence, mutual exclusion, and shareability, among which shareability is not a basic characteristic of multiprogramming.

False

null

1,965

Test

Operating System

Overview

Assertion

Knowledge

English

The goal of a time-sharing system is to respond to users relatively quickly.

True

null

1,966

Test

Operating System

Overview

Assertion

Knowledge

English

After the computer distinguishes between kernel mode and user mode instructions, the transition from kernel mode to user mode is completed after the execution of the operating system program, while the transition from user mode to kernel mode is accomplished by the hardware.

True

null

1,967

Test

Operating System

Overview

Assertion

Knowledge

English

When the CPU is in kernel mode, the only instruction it can execute is the "supervisor call" instruction.

False

null

1,968

Test

Operating System

Overview

Assertion

Knowledge

English

The task of the BIOS is to check if the partition table is correct, determine which partition is the active partition, and at the end of the process, load the boot sector (operating system boot sector) of that partition into memory for execution.

False

null

1,969

Test

Operating System

Overview

Assertion

Knowledge

English

Secondary storage is a resource that should not be managed by the operating system.

False

null

1,970

Test

Operating System

Overview

Assertion

Knowledge

English

Users can interact with the computer through two methods: command-line interface and functions.

False

null

1,971

Test

Operating System

Overview

Assertion

Knowledge

English

The operating system provides users with a command interface, which can be further divided into a batch user interface and a graphical interface, to facilitate users to directly or indirectly control their jobs.

False

null

1,972

Test

Operating System

Overview

Assertion

Knowledge

English

The fundamental characteristics of multiprogramming include concurrency, sharing, and mutual exclusion, but do not include sequentiality.

True

null

1,973

Test

Operating System

Overview

Assertion

Knowledge

English

Interrupt handling is a function that must be provided by the operating system.

True

null

1,974

Test

Operating System

Overview

Assertion

Knowledge

English

In the operating system, the instruction that can only be executed in kernel mode is the fetch instruction.

False

null

1,975

Test

Operating System

Overview

Assertion

Reasoning

English

An important performance aspect of a time-sharing system is the system's response time. Improving the operating system's priority scheme and non-preemptive scheduling algorithms can be beneficial in enhancing the system's response time.

True

Using a priority-based + non-preemptive scheduling algorithm allows important jobs/processes to quickly receive system responses through high priority, while ensuring that less critical jobs/processes will not be indefinitely delayed in receiving system responses under non-preemptive scheduling. Such a balanced design is conducive to improving system response time. Increasing the time slice will delay the system response time: static paging management and reentrant code are unrelated to system response time.

1,976

Test

Operating System

Overview

Assertion

Reasoning

English

In a time-sharing system, the most critical issue to ensure that multiple processes can interact with the system in a timely manner is to allow all ready processes to run within a short period of time. When the number of ready processes is 100, to ensure that the response time does not exceed 2s, the maximum time slice should be 20ms.

True

The response time must not exceed 2s, meaning that all processes must be responded to within 2s. Therefore, the maximum time slice is 2s/100=20ms.

1,977

Test

Operating System

Overview

Assertion

Reasoning

English

After an interrupt occurs, the program that enters the interrupt handling belongs to the operating system software.

True

When an interrupt or exception occurs, hardware implementation ensures that the CPU running in user mode is immediately switched to kernel mode. If the interrupt occurs while a user program is running, the system transitions from user mode to supervisor mode to handle the interrupt; if a low-level interrupt is interrupted, it remains in supervisor mode, as user programs can only run in user mode. Therefore, the program that enters the interrupt handling must be an OS program. The interrupt program itself may be a user program, but the interrupt handling program must be an OS program.

1,978

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

The fundamental difference between a process and a program is their static and dynamic characteristics.

True

null

1,979

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

At any given moment, a change in the state of one process does not necessarily cause a change in the state of another process.

True

null

1,980

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

A process's basic state, which can transition from the other two basic states, must be the blocked state.

False

null

1,981

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

The PCB is the unique identifier of a process; global variables are not part of the PCB.

True

null

1,982

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

In GUI-based debugging programs, multi-threading is not a strength, as it uses different threads to handle user input, computation, and tracking operations separately.

False

null

1,983

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

Two cooperating processes are unable to exchange data using a message-passing system.

False

null

1,984

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

A process will inevitably cause a context switch when it transitions from the running state to the ready state.

True

null

1,985

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

When a process is waiting for a signal from a cooperating process, it is in a non-blocking state.

False

null

1,986

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

In a single-processor multiprocess system, when a process occupies the processor and the duration of its occupancy is determined by the corresponding code length of the process.

False

null

1,987

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

The round-robin scheduling algorithm is favorable for CPU-intensive jobs, but not for I/O-intensive jobs.

False

null

1,988

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

The First-Come, First-Served scheduling algorithm is absolutely preemptive.

False

null

1,989

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

The P operation may lead to the creation of a new process.

False

null

1,990

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

Among the four necessary conditions for deadlock, the one that cannot be broken is the mutual exclusion of resources.

True

null

1,991

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

An unsafe state is a deadlock state.

False

null

1,992

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

During deadlock detection, what is checked is the resource allocation graph.

True

null

1,993

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

The Deadlock Theorem is a method used for the detection of deadlocks.

True

null

1,994

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

A process image is a combination of the PCB structure with the program and data.

True

null

1,995

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

At any given moment, a change in the state of one process must cause a change in the state of another process.

False

null

1,996

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

In a single-processor system, if there are 10 processes present at the same time, then at most 10 processes can be in the ready queue.

False

null

1,997

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

After the completion of an I/O operation requested by a system process, the process state will change from blocked to ready.

True

null

1,998

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

System threads in the dynamic DLL library, when called by different processes, are the same threads.

True

null

1,999

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

In a computer system, the maximum number of processes is primarily limited by the number of users.

False

null

2,000

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

Time-sharing operating systems often adopt the Shortest Job First scheduling algorithm to serve users.

False

null

2,001

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

In operating systems, the reason for synchronizing concurrent processes is because processes must be completed within a limited time frame.

False

null

2,002

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

The program defines a shared data structure and all operations of various processes on that data structure.

False

null

2,003

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

When a waiting process is awakened by the V operation, the awakened process becomes ready.

True

null

2,004

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

There are 5 concurrent processes in a system that involve the same variable A, and the critical section related to variable A consists of 5 critical sections.

True

null

2,005

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

Mailbox communication is a direct method of communication.

False

null

2,006

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

In a system with three concurrent processes that all require four identical resources, the minimum number of resources to ensure that the system will not experience deadlock is 10.

True

null

2,007

Test

Operating System

Processes and Threads

Assertion

Knowledge

English

One of the prerequisites for introducing multiprogramming technology is that the system has time-sharing capabilities.

False

null

2,008

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

Introducing threads can enhance the degree of concurrent execution of a program, thereby further improving system efficiency.

True

A thread is a relatively independent unit of execution within a process, but it cannot run independently of the process and can only operate within it. The introduction of threads is to reduce the time and space overhead during program execution. A process can contain one or more threads.

2,009

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

When the time slice expires, the process transitions from the running state to the ready state.

True

When a process's time slice expires, the process transitions from the running state to the ready state, waiting for the arrival of the next time slice.

2,010

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

To minimize the average turnaround time, jobs with shorter runtimes should be executed first. Therefore, the execution order for the minimum average turnaround time is to execute Job 1 (2h), Job 3 (3h), Job 2 (5h), that is, in the order of Job 1, Job 3, Job 2.

True

When running in a uniprogramming mode on the same processor, to achieve the shortest average turnaround time, the Shortest Job First scheduling algorithm tends to be effective. Regarding this question: The average turnaround time for option A is (2+7+10)/3h = 19/3h; the average turnaround time for option B is (3+8+10)/3h = 7h. The average turnaround time for option C is (5+7+10)/3h = 22/3h; the average turnaround time for option D is (2+5+10)/3h = 17/3h.

2,011

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

The round-robin scheduling algorithm is absolutely preemptive.

True

The Round-Robin scheduling algorithm operates on a fixed time quantum; once the time is up, regardless of whether the task is completed, the current process must be suspended to schedule a new process. Therefore, it is determined by the time quantum and is absolutely preemptive. Both the Priority scheduling algorithm and the Shortest Job First algorithm can be divided into preemptive and non-preemptive versions.

2,012

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

The scheduling algorithm with an average turnaround time of 14 is priority scheduling.

False

When these 5 batch jobs are scheduled using the Shortest Job First scheduling algorithm, the average turnaround time is [2+(2+4)+(2+4+6)+(2+4+6+8)+(2+4+6+8+10)]/5=14. This question mainly tests the reader's understanding of various priority scheduling algorithms. If solved using the method in question 18, it might take some time, but it is worthwhile as it helps to practice the basic methods. Such questions with a large amount of operations and calculations are rarely encountered in exams, so readers need not worry.

2,013

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

In process scheduling algorithms, the First-Come, First-Served (FCFS) scheduling algorithm is disadvantageous for short processes.

True

In the First-Come, First-Served scheduling algorithm, if a long process (job) arrives at the system first, it will cause many subsequent short processes (jobs) to wait for an extended period, thus disadvantaging short processes (jobs).

2,014

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

Process synchronization can be achieved without the need for semaphores.

False

In multiprogramming, the semaphore mechanism is an effective tool for implementing process synchronization and mutual exclusion. The precedence relationship of process execution essentially refers to the synchronization relationship between processes. Besides, concurrent execution of processes does not require semaphore control, hence the correct answer is D.

2,015

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

When using the PV operation synchronization mechanism, the value range of semaphore S is 2, 1, 0, and -1.

True

Since the program segment allows two processes to enter at a time, the maximum value of the semaphore is 2. With at most three processes applying, the minimum value of the semaphore is -1; therefore, the semaphore can take the values 2, 1, 0, -1.

2,016

Test

Operating System

Processes and Threads

Assertion

Reasoning

English

After acquiring resources, a process can only release them after it has finished using them; this belongs to the non-preemptive condition, which is one of the necessary conditions for deadlock.

True

After acquiring resources, a process can only release them after they have been used, meaning its resources cannot be preempted by the system. The answer is option C.

2,017

Test

Operating System

Memory Management

Assertion

Knowledge

English

In storage management, the purpose of adopting overlay and swapping techniques is to achieve main memory sharing.

False

null

2,018

Test

Operating System

Memory Management

Assertion

Knowledge

English

In segmented paging storage management, the address mapping table consists of one page table for each process and one segment table for each segment.

False

null

2,019

Test

Operating System

Memory Management

Assertion

Knowledge

English

After adopting paging or segmentation management, the physical address space provided to users remains the same.

False

null

2,020

Test

Operating System

Memory Management

Assertion

Knowledge

English

The management of the external storage swap area should primarily aim to increase the speed of swapping in and out.

True

null

2,021

Test

Operating System

Memory Management

Assertion

Knowledge

English

An operating system manages memory using a paging storage management method, where the size of the pages allocated must be the same.

True

null

2,022

Test

Operating System

Memory Management

Assertion

Knowledge

English

The storage management method unsuitable for multiprogramming systems is variable partition allocation.

False

null

2,023

Test

Operating System

Memory Management

Assertion

Knowledge

English

In segmented storage management, storage is divided into segments, with each segment being a contiguous storage area.

True

null

2,024

Test

Operating System

Memory Management

Assertion

Knowledge

English

The maximum capacity of virtual memory depends on the address space of the process.

False

null

2,025

Test

Operating System

Memory Management

Assertion

Knowledge

English

In page replacement strategies, the FIFO strategy may lead to thrashing.

False

null

2,026

Test

Operating System

Memory Management

Assertion

Knowledge

English

The foundation of the virtual storage management system is the theory of program virtuality.

False

null

2,027

Test

Operating System

Memory Management

Assertion

Knowledge

English

The main characteristic of paging virtual memory management is that it does not require loading the entire job into a contiguous area of the main memory at once.

True

null

2,028

Test

Operating System

Memory Management

Assertion

Knowledge

English

The storage management that does not produce internal fragmentation is segmented storage management.

True

null

2,029

Test

Operating System

Memory Management

Assertion

Knowledge

English

For the relocation storage management method, a relocation register should be set up throughout the entire system.

True

null

2,030

Test

Operating System

Memory Management

Assertion

Knowledge

English

The management of the external storage swap area should primarily aim to enhance system throughput.

False

null

2,031

Test

Operating System

Memory Management

Assertion

Knowledge

English

In the segmented storage management method, each segment is of equal length.

False

null

2,032

Test

Operating System

Memory Management

Assertion

Knowledge

English

Virtual storage technology is a technique to supplement external storage space.

False

null

2,033

Test

Operating System

Memory Management

Assertion

Knowledge

English

The main feature of demand paging storage management is the expansion of memory.

True

null

2,034

Test

Operating System

Memory Management

Assertion

Knowledge

English

The storage management methods of virtual storage technology include demand paging storage management.

True

null

2,035

Test

Operating System

Memory Management

Assertion

Reasoning

English

To implement virtual memory management, corresponding hardware support is required.

True

Options A and B are obviously incorrect. The size of the addressing space in option C depends on the memory access capability of the hardware, which is generally determined by the width of the address bus. Option D requires hardware and software support for the management of virtual memory, including mechanisms such as demand paging page tables, page fault interrupts, and address translation facilities.

2,036

Test

Operating System

Memory Management

Assertion

Reasoning

English

In the paging storage management scheme, static relocation can be adopted.

False

In the fixed partitioning method, once a job is loaded, its position does not change, and static relocation can be used. The other three management schemes may change the program's position during execution, and static relocation cannot meet their requirements.

2,037

Test

Operating System

Memory Management

Assertion

Reasoning

English

Single-user contiguous allocation is a storage management method that is not suitable for multiprogramming systems.

True

The single-user contiguous allocation method is only suitable for single-user, single-task operating systems and is not applicable to multiprogramming.