HCLTech

Global IT services and consulting company.

4 Rounds ~21 Days Medium
Start Mock Interview

The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

Backend Engineer Coding easy

Given an array of integers and an integer target, return indices of the two numbers such that they add up to target. Can you do it in O(n) time complexity?

#Arrays #Hash Table
Backend Engineer Coding medium

Find the length of the longest substring without repeating characters in a given string.

#Strings #Sliding Window
Backend Engineer Coding medium

Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals.

#Arrays #Sorting
Backend Engineer Coding hard

Given the head of a linked list, reverse the nodes of the list k at a time, and return the modified list.

#Linked List #Recursion
Backend Engineer Coding medium

Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order.

#Heap #Hash Table #Bucket Sort
Backend Engineer Coding medium

Given the root of a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom.

#Binary Tree #Breadth-First Search #Depth-First Search

Difficulty Radar

Based on recent AI-sourced data.

Meet Your Interviewers

The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

Simulate

Unwritten Rules

Think Out Loud

Always explain your thought process before writing code or drawing architecture.

Practice Now