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

Full Stack Engineer • Coding • medium

Perform a level order traversal of a binary tree and return the node values level by level.

#Trees #Breadth-First Search #Queue
Practice
Full Stack Engineer • Coding • easy

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

#Arrays #Hash Table
Practice
Full Stack Engineer • Coding • medium

Reverse a string without affecting the position of special characters.

#Strings #Two Pointers
Practice
Full Stack Engineer • Coding • easy

Find the first non-repeating character in a string and return its index. If it does not exist, return -1.

#Strings #Hash Table #Counting
Practice
Full Stack Engineer • Coding • medium

Merge two sorted arrays into a single sorted array without using extra space (O(1) space complexity).

#Arrays #Two Pointers #Sorting
Practice
Full Stack Engineer • Coding • easy

Detect if a linked list has a cycle in it.

#Linked List #Two Pointers
Practice
Full Stack Engineer • Coding • medium

Find the length of the longest substring without repeating characters.

#Strings #Sliding Window #Hash Table
Practice
Full Stack Engineer • Coding • easy

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

#Strings #Stack
Practice

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.

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