The program should print the names of all the files in the current directory. Write a C program that runs with one command line parameter command . The program should execute the command and print a message saying how long it took to run. An existing file can have extra bytes appended to the end of it, leaving the existing contents unaltered. The Unix file system.
Many computer viruses add their own code to existing files, changing their length.
A simple way of detecting this is to compare file lengths before and after. Discuss the advantages and disadvantages of this, in no more than one page. The memory of a system is 128 blocks and is organised using the buddy system. Intitially all memory is free. Show the state of memory after each request.