CommVault interview questions
Online test → System design → Technical → HR·91% entry level
DSA
Showing 27 of 96 reported in this area
Find the longest palindromic substring in a given string.
Find the kth smallest element in a Binary Search Tree
Find the minimum number of swaps required to rearrange a string of Cs and Ds such that no two identical characters are consecutive
Merge two sorted linked lists into a single sorted list
Mirror view of a binary tree
Longest Palindromic Substring
Implement the 0/1 Knapsack problem
Print the left view of a binary tree
Print a random line from a given file.
Reverse a linked list in groups of size K
Split a circular linked list into two halves
Swap two given nodes in a singly linked list.
Reverse every k consecutive nodes in a linked list
Reverse a linked list in alternate groups of size k.
Find all substrings of a string that contain only vowels
Find the maximum sum path from top to bottom in a matrix.
Find an element in a sorted rotated array in O(log N) time
Given a linked list, reverse every k nodes of the linked list
Solve the Fractional Knapsack problem using a greedy approach
Print the binary search tree in zig-zag (spiral) order traversal.
Find the maximum element between two given nodes in a binary tree.
Find the minimum cost path in a matrix from top-left to bottom-right
Find the length of the longest palindromic substring in a given string.
Solve coding problems from Trees, Linked Lists, and Dynamic Programming.
Simulate the Burning House problem using a matrix and Breadth First Search.
Given two nodes in a Binary Search Tree, find the maximum element between them.
Find the length of the longest subarray containing consecutive integers in O(N) time
CS fundamentals
Showing 24 of 85 reported in this area
Difference between process and thread
How would you test Google Drive?
What is subnetting and subnet mask?
What is a deadlock in operating systems?
Explain CPU scheduling and disk scheduling.
How would you debug a data recovery device?
Explain different CPU scheduling algorithms.
Explain how encoding works across network layers.
Find the second highest income from a given table.
Explain the internal implementation of HashMap in Java
Differentiate between services, processes, and threads.
Explain the Random Forest algorithm and why it works well.
Explain virtual memory and thrashing in operating systems.
Explain threads and their management in an operating system
Explain the difference between static and runtime polymorphism
How do you store unstructured data and which database is used?
What is end-to-end encryption in WhatsApp and how does it work?
Explain concurrency control concepts through a real-world scenario
Explain multithreading and how memory sharing works between threads.
Write all possible test cases for the WhatsApp Backup and Restore feature
How can you find the size of an integer without using the sizeof operator?
Explain how heaps are implemented in C++ STL and discuss related operations.
How is multithreading achieved in Java and how do you prevent race conditions?
Explain Computer Network layers, their functions, and socket programming basics
System design
Showing 3 of 16 reported in this area
Design and implement a file system structure supporting directories and files with efficient file explorer operations.
Design and implement a basic file system
Design an MP3 player system to manage songs and multiple playlists using object-oriented design
Puzzles
Showing 3 of 5 reported in this area
You have 10 bags, 9 bags weigh 10 grams each and 1 bag weighs 9 grams. What is the minimum number of comparisons needed to find the lighter bag?
Solve multiple hard logical puzzles during the interview.
Given three jars incorrectly labeled as Oranges, Mangoes, and Mixed, determine the correct labels by picking the minimum number of fruits.
Aptitude
Showing 3 of 4 reported in this area
Basic quantitative aptitude questions
Logical aptitude questions involving basic reasoning
Aptitude questions involving quantitative and logical reasoning
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What questions does CommVault ask?
Candidate interview reports most often cover DSA (47%) and CS fundamentals (41%).
How many rounds does CommVault interview have?
Candidate interview reports show an average of 3.3 rounds per experience, with a typical sequence of Online test → System design → Technical → HR. Individual interview paths can vary.
Is the CommVault interview hard?
Among questions with a reported difficulty, the mix is easy 34%, medium 54%, hard 12%.