Interview Questions – HireDeck

Table of Contents

❓ Interview Questions

Company-wise interview questions with Java solutions

🪟 Microsoft

Software Engineering Intern – Top Interview Questions

1. LRU Cache Medium

Design a data structure that follows Least Recently Used cache rules

2. Longest Substring Without Repeating Characters Medium

Find the length of the longest substring without repeating characters

3. Merge Intervals Medium

Merge all overlapping intervals

4. Valid Binary Search Tree Medium

Validate if a binary tree is a BST

All questions include: Complete Java solutions with explanations and time complexity analysis.

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🪟 IBM

Associate System Engineer – 5 Ways to Reverse a String in Java

1. Simple Loop

2. Two-Pointer

3. StringBuilder

4. Char Array

4. Streams

All questions include: Complete Java solutions with explanations and time complexity analysis.

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Wipro

Wipro Global Service line Internship – Most Important Coding Questions

1. Two Sum

2. Valid Palindrome

3. Second Highest Salary (SQL)

4. Valid Parentheses

All questions include: Complete Java solutions with explanations and time complexity analysis.

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Wipro

Wipro Internship 2026 – 3 Java Programs with Solutions

1. The FMEA (Failure Mode Effect Analysis) Simulator

2. CAD Model Volume Calculator (Method Overloading)

3. Manufacturing Process Optimizer

All questions include: Complete Java solutions with explanations.

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Alacriti

Alacriti Hiring Challenge: 5 Must-Practice Coding Questions

1. Luhn Algorithm – Validate Credit Card

2. Find Duplicate Transactions

3. Producer-Consumer Problem

4. Sort Transactions by Date

5. Singleton Payment Gateway

All questions include: Complete Java solutions with explanations, You can download pdf.

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