Athena-Health interview questions
Online test → Technical → Managerial → HR·83% entry level
DSA
Showing 22 of 61 reported in this area
Detect and remove a loop in a linked list
Explain Dijkstra’s algorithm and its applications.
Explain Doubly Linked List and its operations with code.
Perform level order and spiral order traversal of a binary tree and analyze complexity
Find the minimum number of increment operations required to make all elements of an array equal.
In C++, given a map<stud_id, cgpa>, delete all students whose cgpa < 5 without using extra space.
Explain the greedy approach used in the candy store problem and analyze its time and space complexity.
Given a bitonic array, execute logic to produce the desired output and explain approach and complexity.
Find the maximum number of meetings that can be accommodated in one meeting room given start and end times.
Print the reverse of a singly linked list in O(n) time without using extra space and without modifying the list.
Given an array of integers and a target sum t, count the number of triplets whose sum is less than or equal to t.
Given prices of candies in a shop and an offer scheme, find the minimum and maximum amount needed to buy all candies.
Given meeting start and end times, find the minimum number of meeting rooms (or halls) required so that no meetings overlap.
Given two unsorted arrays A and B, find the count of distinct pairs whose sum equals X. Explain the optimized approach and code it.
Given n, generate a concentric square matrix pattern and then modify the logic to generate the inverse pattern (example shown for n=3)
Given two unsorted arrays A and B of distinct elements, find all distinct pairs (a, b) such that a + b = X and return the count of such pairs.
Given an integer array and a value k, find the minimum element in each subarray of size k and then print the maximum among those minimum values.
Given a binary string containing wildcard characters '?', generate all possible strings by replacing each '?' with both 0 and 1. Example: Input 0?1?
Given an array of integers and a value k, find all triplets such that the product of two elements equals k and the third element equals k. Example: Array {2,3,7,6,8,9}, k=6
Encode a string by mapping each character to its alphabetical index (a=1, b=2, ...). If a character repeats consecutively, append its count in parentheses after the encoded value.
Given an array of n positive integers, find the minimum number of iterations to make all elements equal. In each iteration, all elements except the maximum element are reduced by 1.
Find the maximum number of distinct pairs in an array such that the sum of each pair equals a given target. Each pair should be counted only once even if multiple index combinations exist.
CS fundamentals
Showing 30 of 58 reported in this area
What is the difference between an abstract class and an interface in Java?
How do you make a class immutable in Java?
What is a JIT compiler? Explain how it works.
Explain concepts of threads and multiprocessing
Explain the implementation of Linux directory structure
Explain the concept of Threads and Multithreading in Java.
Explain real-time applications of different data structures.
How does blockchain ensure data confidentiality and integrity?
Explain abstract classes vs interfaces. Why do interfaces exist?
How do you decide which data structure to use for a given problem?
What is normalization in databases and what are its different types?
Explain internal and external fragmentation in dynamic memory allocation.
Can a stack be implemented using a queue? Explain the principle of a stack.
Why are trees needed? Explain tree traversals and why BSTs came into existence.
How does garbage collection work internally in Java? Why do memory leaks happen?
Explain the DOM and Virtual DOM, and describe how the Virtual DOM works in React.
Explain the four pillars of OOP. Why is multiple inheritance not allowed in Java?
Is Java and C++ truly object-oriented? How does Java handle primitive data types?
Explain pointers and memory allocation for pointers. Why were pointers removed in Java?
Write SQL queries using joins, subqueries, GROUP BY, and HAVING clauses on given tables.
Do graphs have a defined structure? Give real-life examples and explain graph traversals.
Can binary search be performed on a linked list? Explain how linked lists work internally.
Which data structure is best suited to implement a dictionary and what are its pros and cons?
Explain OOP concepts in Java including encapsulation, abstraction, inheritance, and polymorphism.
Explain encapsulation, abstraction, inheritance, method overloading, and method overriding with examples.
Explain the difference between Tree and Trie data structures and implement a Trie with real-time examples
Write an SQL query to display student roll number along with faculty number given student and faculty tables.
Explain heap, stack, and code memory architecture in C++ and whether stack overflow can overwrite heap memory.
Implement multiple inheritance in Java using interfaces and demonstrate method overriding and method overloading.
Predict the output of pointer and array operations in C++ for code involving array increment, pointer increment, and dereferencing (e.g., cout<<a++; cout<<p++; cout<<*a++; cout<<*p++;).
Behavioural
Showing 3 of 4 reported in this area
Describe a situation related to teamwork or management and explain how you would handle it.
How do you handle work pressure? How do you plan before starting challenging tasks? Describe a situation where you learned from your mistakes.
Describe a challenging situation you faced in a project and how you handled it.
Puzzles
Showing 3 of 4 reported in this area
How long will it take to climb a 30-feet wall? (Puzzle)
A puzzle related to choosing between heaven and hell based on truth-tellers and liars.
You are given 3 buckets of capacities 4, 5, and 13 liters. How can you measure exactly 7 liters of water using these buckets?
Aptitude
Showing 2 of 3 reported in this area
Identify the pattern in a given mathematical series and write code to generate it.
Given a triangular number pattern, identify positions and relationships within the sequence
Showing 60 of 115 questions. Ranked by how often the same question came back across reports.
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What questions does Athena-Health ask?
Candidate interview reports most often cover DSA (47%) and CS fundamentals (45%).
How many rounds does Athena-Health interview have?
Candidate interview reports show an average of 4.2 rounds per experience, with a typical sequence of Online test → Technical → Managerial → HR. Individual interview paths can vary.
Is the Athena-Health interview hard?
Among questions with a reported difficulty, the mix is easy 42%, medium 54%, hard 4%.