HCL interview questions
Online test → Technical → HR·91% entry level
CS fundamentals
Showing 32 of 142 reported in this area
Why is Java platform independent?
What is the Virtual DOM in React?
Explain the concepts of FFT and IFT
Explain Promises and callbacks in JavaScript.
Explain the concept of hoisting in JavaScript
Explain AES, DES, and RSA encryption algorithms.
What is operator overloading? How is it handled in Java?
Explain Java string pool and multiple inheritance in Java
What are the port numbers of protocols in the TCP/IP model?
Conceptual questions on Sensors and their working principles
How do you handle exceptions in a web application using PHP?
Can a constructor be private? If yes, why and where is it used?
Explain the role of Spring Data JPA in a Spring Boot application
Explain different tree traversal techniques and their time complexity
What is the difference between symmetric and asymmetric cryptography?
What is static? Can a class be static? If yes, what is a static class?
Write a medium-level SQL query involving multiple conditions or joins.
Explain smart pointers in C++ and write code to demonstrate their usage
How do you keep your automated tests maintainable and scalable over time?
Explain worst-case and average-case time complexity of common sorting algorithms
How would you create an automated script to test an e-commerce checkout process?
Explain REST architecture and design a REST API for a given application scenario.
How do you implement responsive web design and ensure cross-browser compatibility?
Computer networking fundamentals (protocols, layers, and basic networking concepts)
Explain deadlocks with real-life examples and how can deadlocks be avoided using Banker's Algorithm?
Explain different state management approaches in frontend applications, such as Redux and Context API.
What are CSS preprocessors like SASS or LESS, and how do you organize and maintain CSS for large projects?
Conceptual questions based on 12th standard physics topics such as Beams and their properties
Basic SQL theory questions
What is a foreign key in DBMS?
Differentiate between C and Python.
What are hashtags used for in Python?
DSA
Showing 16 of 61 reported in this area
Check whether a given number is an Armstrong number
Design and implement an LRU Cache
Find the largest sum contiguous subarray
Print all subsequences of a given string
Find the merge point of two linked lists.
Solve a program based on bit manipulation
Find the number of islands in a given 2D grid
Find the element in an array that appears more than N/3 times
Write a program using arrays or linked lists to solve a given problem
Find the minimum number of coins required to make a given amount of change
Search a given word in a 2D character matrix (grid) considering all edge cases
Detect a cycle in a linked list and find the starting node of the cycle and its length
Given an array, find the next smaller element and the next greater element for each element
Reverse a linked list
Reverse a singly linked list
Swap two bits of an integer.
Aptitude
Showing 7 of 27 reported in this area
Solve logical reasoning questions including puzzles, number/letter series, and data interpretation
Answer verbal ability questions covering grammar, vocabulary, and reading comprehension
Answer logical reasoning questions involving coding-decoding and blood relations.
Solve quantitative aptitude problems based on percentages, time and work, and probability.
Solve quantitative aptitude problems involving percentages, time and work, and probability
Logical reasoning questions based on figures, directions, calendars, blood relations, and coding-decoding
Quantitative aptitude questions on simple and compound interest, profit and loss, probability, permutations, mixtures, and number systems
Behavioural
Showing 3 of 23 reported in this area
How would you resolve conflicts in a team?
How would you handle a difficult team member or resolve conflict within a team?
If you are given a water bottle to release into the market, what kinds of tests would you perform on it?
Puzzles
1 questions reported in this area
Solve logical puzzles to test analytical and problem-solving ability
asked oncePractice this →
System design
1 questions reported in this area
Design a system to efficiently handle a large number of requests from Uber drivers.
Showing 60 of 200 questions. Ranked by how often the same question came back across reports.
Practise a HCL-style interview
A spoken interview built from these questions, scored when you finish; the report is yours.
Start practisingCommon questions
What questions does HCL ask?
Candidate interview reports most often cover CS fundamentals (56%) and DSA (24%).
How many rounds does HCL interview have?
Candidate interview reports show an average of 3.2 rounds per experience, with a typical sequence of Online test → Technical → HR. Individual interview paths can vary.
Is the HCL interview hard?
Among questions with a reported difficulty, the mix is easy 68%, medium 31%, hard 1%.