AthenaHealth Interview Experience (On - Campus) - GeeksforGeeks

28 Aug, 2020
Round 1: Hakerrank – 12 Questions – 90 mins  
10 MCQ: Based on core subjects like OS, CN, and OOPS concepts. Also, Code related questions to predict the output of the given code.
2 Coding Questions:
Profit Target: Given an array of n elements where each element gives the yearly profit of a corresponding stock, find the max number of distinct pairs (pairs differing in at least one element) from the array that adds up to the given profit target.Sample Input 1:[1,3,46,1,3,9] , sum = 47
possible pairs are: (1,46), (46,1), (46,1), (1,46)  
indexes:  [0][2]  [2][0]  [2][3]  [3][2]
          - four times due to repetition of '1'
          - return only once - (46,1)
Hence, output = 1Sample Input 2:[5,7,9,13,11,6,6,3,3] sum = 12
possible pairs are: (5,7), (7,5), (9,3), 
                    (9,3), (3,9), (9,3),
                    (6,6), (6,6)
indexes: [0][1] [1][0] [2][7] [2][8] 
         [7][2] [8][2] [5][6] [6][5]
         return only distinct - (5,7), (9,3), (6,6)
         Hence, output = 3Simple Max Difference: Given an array of size n where elements are closing prices of a particular stock on n days in order, find the maximum profit spread of the stock. Profit spread it the difference between the closing price of a day and the closing price on any of the previous days in history. If the prices remain flat or are continuously decreasing, return -1.Sample input 1:[7,1,2,5]  
    1<7 -> continue;
    2>1 -> 2-1 = 1 : diff
    5>2 -> 5-2 = 3
    5-1 = 4 : maximum diff = outputSample Input 2:[7,5,2,1]
    5<7 , 2<5 , 1<2 -> continuously decreasing : return -1;
Profit Target: Given an array of n elements where each element gives the yearly profit of a corresponding stock, find the max number of distinct pairs (pairs differing in at least one element) from the array that adds up to the given profit target.Sample Input 1:[1,3,46,1,3,9] , sum = 47
possible pairs are: (1,46), (46,1), (46,1), (1,46)  
indexes:  [0][2]  [2][0]  [2][3]  [3][2]
          - four times due to repetition of '1'
          - return only once - (46,1)
Hence, output = 1Sample Input 2:[5,7,9,13,11,6,6,3,3] sum = 12
possible pairs are: (5,7), (7,5), (9,3), 
                    (9,3), (3,9), (9,3),
                    (6,6), (6,6)
indexes: [0][1] [1][0] [2][7] [2][8] 
         [7][2] [8][2] [5][6] [6][5]
         return only distinct - (5,7), (9,3), (6,6)
         Hence, output = 3
Sample Input 1:
[1,3,46,1,3,9] , sum = 47
possible pairs are: (1,46), (46,1), (46,1), (1,46)  
indexes:  [0][2]  [2][0]  [2][3]  [3][2]
          - four times due to repetition of '1'
          - return only once - (46,1)
Hence, output = 1
Sample Input 2:
[5,7,9,13,11,6,6,3,3] sum = 12
possible pairs are: (5,7), (7,5), (9,3), 
                    (9,3), (3,9), (9,3),
                    (6,6), (6,6)
indexes: [0][1] [1][0] [2][7] [2][8] 
         [7][2] [8][2] [5][6] [6][5]
         return only distinct - (5,7), (9,3), (6,6)
         Hence, output = 3
Simple Max Difference: Given an array of size n where elements are closing prices of a particular stock on n days in order, find the maximum profit spread of the stock. Profit spread it the difference between the closing price of a day and the closing price on any of the previous days in history. If the prices remain flat or are continuously decreasing, return -1.Sample input 1:[7,1,2,5]  
    1<7 -> continue;
    2>1 -> 2-1 = 1 : diff
    5>2 -> 5-2 = 3
    5-1 = 4 : maximum diff = outputSample Input 2:[7,5,2,1]
    5<7 , 2<5 , 1<2 -> continuously decreasing : return -1;
Sample input 1:
[7,1,2,5]  
    1<7 -> continue;
    2>1 -> 2-1 = 1 : diff
    5>2 -> 5-2 = 3
    5-1 = 4 : maximum diff = output
Sample Input 2:
[7,5,2,1]
    5<7 , 2<5 , 1<2 -> continuously decreasing : return -1;
Round 2: Technical Interview on Hakerrank CodePair – 60 mins
Based on projects – BlockchainWhat is blockchain?How is it useful?How does it ensure data confidentiality and integrityExplain its working.Based on projects – MEAN StackWhat did you do?What is mongo?What do you know about nonstructural databases?Based on programming languages – C, C++, JavaWhat is the difference between C, C++, and Java?What are object-oriented and procedural languages? Is java a true object-oriented language? Is C++? Explain. If yes, then how does java use primitive data types like int and char? What is the difference between Integer Class and int data type? For particular application development, how would you choose between C++ and Java  What constraints would you focus on for the selection?What are pointers and how is the memory allocated for them?What is the problem with pointers – why were they removed when java was built?What are the Object-oriented concepts?Explain the difference between Encapsulation and AbstractionWhat is Inheritance?What are the types of inheritance?Do we need to explicitly call the parent class constructor from the child class constructor?Does C++ support all types of inheritance? Does Java support all?How are multiple inheritances handled in C++?What is method overriding and overloading?Give a real-life example of function overloading and overriding?Can Static variables in a class be accessed by the child classes that inherit it?What is the memory architecture in C++ Programming? – regarding heap, stack, and codeIf the stack is increased indefinitely due to the number of recursion calls, will it override the heap?Difference between String and StringBuilder classes? What is the use of StringBuilder?Coding problem  Implement Merge SortShow Inheritance using abstract class
Based on projects – BlockchainWhat is blockchain?How is it useful?How does it ensure data confidentiality and integrityExplain its working.
Based on projects – Blockchain
What is blockchain?
How is it useful?
How does it ensure data confidentiality and integrity
Explain its working.
Based on projects – MEAN StackWhat did you do?What is mongo?What do you know about nonstructural databases?
Based on projects – MEAN Stack
What did you do?
What is mongo?
What do you know about nonstructural databases?
Based on programming languages – C, C++, JavaWhat is the difference between C, C++, and Java?What are object-oriented and procedural languages? Is java a true object-oriented language? Is C++? Explain. If yes, then how does java use primitive data types like int and char? What is the difference between Integer Class and int data type? For particular application development, how would you choose between C++ and Java  What constraints would you focus on for the selection?What are pointers and how is the memory allocated for them?What is the problem with pointers – why were they removed when java was built?What are the Object-oriented concepts?Explain the difference between Encapsulation and AbstractionWhat is Inheritance?What are the types of inheritance?Do we need to explicitly call the parent class constructor from the child class constructor?Does C++ support all types of inheritance? Does Java support all?How are multiple inheritances handled in C++?What is method overriding and overloading?Give a real-life example of function overloading and overriding?Can Static variables in a class be accessed by the child classes that inherit it?What is the memory architecture in C++ Programming? – regarding heap, stack, and codeIf the stack is increased indefinitely due to the number of recursion calls, will it override the heap?Difference between String and StringBuilder classes? What is the use of StringBuilder?
Based on programming languages – C, C++, Java
What is the difference between C, C++, and Java?
What are object-oriented and procedural languages?
 Is java a true object-oriented language? Is C++? Explain.
 If yes, then how does java use primitive data types like int and char?
 What is the difference between Integer Class and int data type?
 For particular application development, how would you choose between C++ and Java  
What constraints would you focus on for the selection?
What are pointers and how is the memory allocated for them?
What is the problem with pointers – why were they removed when java was built?
What are the Object-oriented concepts?
Explain the difference between Encapsulation and Abstraction
What is Inheritance?
What are the types of inheritance?
Do we need to explicitly call the parent class constructor from the child class constructor?
Does C++ support all types of inheritance? Does Java support all?
How are multiple inheritances handled in C++?
What is method overriding and overloading?
Give a real-life example of function overloading and overriding?
Can Static variables in a class be accessed by the child classes that inherit it?
What is the memory architecture in C++ Programming? – regarding heap, stack, and code
If the stack is increased indefinitely due to the number of recursion calls, will it override the heap?
Difference between String and StringBuilder classes? What is the use of StringBuilder?
Coding problem  Implement Merge SortShow Inheritance using abstract class
Coding problem  
Implement Merge Sort
Show Inheritance using abstract class
Round 3: HR – Basic behavioral questions.
Athena-Health
Marketing
On-Campus
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