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Infosys Coding Interview Questions

Practice coding problems that Infosys uses to assess your logical reasoning, coding accuracy, and ability to work under constraints.

Overview

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Infosys places a strong emphasis on clarity of logic, correctness, and structured problem-solving in its coding interviews. Whether you're applying through campus recruitment, HackWithInfy, InfyTQ, or experienced hiring, you’ll encounter questions that demand clean code and thoughtful solutions. These coding problems are designed to help you practice exactly that. You’ll solve problems similar to what Infosys often tests: output-based questions, logic-heavy loops, conditionals, and efficient handling of arrays or strings. Many problems involve constraints around input size, performance, and edge conditions, just like in the actual Infosys coding rounds. Rather than learning patterns in theory, you'll apply them under time pressure with auto-graded challenges. It’s practical prep for the structured thinking Infosys interviews are known to evaluate.

Infosys places a strong emphasis on clarity of logic, correctness, and structured problem-solving in its coding interviews. Whet...Show More

WHAT YOU'LL LEARN

How to approach logic-based coding questions commonly asked by Infosys and implement clear, efficient solutions.

Solving problems involving pattern printing, array transformations, and string operations.

Writing accurate solutions under time and memory constraints.

Practicing iterative, conditional, and simulation-based coding strategies.

Building code that is clear, testable, and easy to walk through with an interviewer.

How to approach logic-based coding questions commonly asked by Infosys and implement clear, efficient solutions.

Learning Roadmap

1033 Lessons533 Quizzes532 Challenges

Getting Started

Course Overview

Who Should Take This Course

Two Pointers

Introduction to Two Pointers

Valid Palindrome

Solution: Valid Palindrome

3Sum

Solution: 3Sum

Remove Nth Node from End of List

Solution: Remove Nth Node from End of List

Sort Colors

Solution: Sort Colors

Reverse Words in a String

Solution: Reverse Words in a String

Valid Word Abbreviation

Solution: Valid Word Abbreviation

Strobogrammatic Number

Solution: Strobogrammatic Number

Minimum Number of Moves to Make Palindrome

Solution: Minimum Number of Moves to Make Palindrome

Next Palindrome Using Same Digits

Solution: Next Palindrome Using Same Digits

Lowest Common Ancestor of a Binary Tree III

Solution: Lowest Common Ancestor of a Binary Tree III

Count Pairs Whose Sum is Less than Target

Solution: Count Pairs Whose Sum is Less than Target

Count Subarrays With Fixed Bounds

Solution: Count Subarrays With Fixed Bounds

Get the Maximum Score

Solution: Get the Maximum Score

Find the Lexicographically Largest String From Box II

Solution: Find the Lexicographically Largest String From Box II

Create Maximum Number

Solution: Create Maximum Number

Append Characters to String to Make Subsequence

Solution: Append Characters to String to Make Subsequence

Squares of a Sorted Array

Solution: Squares of a Sorted Array

Reverse String

Solution: Reverse String

Intersection of Two Linked Lists

Solution: Intersection of Two Linked Lists

Remove Element

Solution: Remove Element

String Compression

Solution: String Compression

Partition Labels

Solution: Partition Labels

Next Permutation

Solution: Next Permutation

Rotate Array

Solution: Rotate Array

Remove Duplicates from Sorted Array

Solution: Remove Duplicates from Sorted Array

Is Subsequence

Solution: Is Subsequence

Reverse Vowels of a String

Solution: Reverse Vowels of a String

Valid Palindrome II

Two Pointers

Mock Interview

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Fast and Slow Pointers

21 Lessons

Fast and Slow Pointers

Mock Interview

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Sliding Window

39 Lessons

Sliding Window

Mock Interview

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Intervals

20 Lessons

Merge Intervals

Mock Interview

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In-Place Manipulation of a Linked List

28 Lessons

In-place manipulation of a linked list

Mock Interview

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Heaps

25 Lessons

Heaps

Mock Interview

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K-way merge

15 Lessons

K-way merge

Mock Interview

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Top K Elements

37 Lessons

10.

Modified Binary Search

40 Lessons

Modified Binary Search

Mock Interview

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11.

Subsets

16 Lessons

12.

Greedy Techniques

45 Lessons

13.

Backtracking

39 Lessons

14.

Dynamic Programming

76 Lessons

Dynamic Programming

Mock Interview

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15.

Cyclic Sort

12 Lessons

16.

Topological Sort

22 Lessons

Topological Sort

Mock Interview

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17.

Sort and Search

33 Lessons

18.

Matrices

37 Lessons

19.

Stacks

34 Lessons

20.

Graphs

35 Lessons

Graphs

Mock Interview

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21.

Tree Depth-First Search

41 Lessons

22.

Tree Breadth-First Search

26 Lessons

Tree Breadth First Search

Mock Interview

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23.

Trie

30 Lessons

24.

Hash Maps

58 Lessons

25.

Knowing What to Track

38 Lessons

Knowing what to track

Mock Interview

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26.

Union Find

28 Lessons

Union Find

Mock Interview

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27.

Custom Data Structures

32 Lessons

28.

Bitwise Manipulation

34 Lessons

Bitwise Manipulation

Mock Interview

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29.

Math and Geometry

73 Lessons

Math and Geometry

Mock Interview

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30.

Challenge Yourself

40 Lessons

31.

Conclusion

Where to Go from Here?

Coding Patterns

Mock Interview

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Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Course Author:

Fahim ul Haq

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Personalized Interview Prep

Skip the LeetCode grind with a custom roadmap that adapts to your goals. Hands-on practice for Coding Interviews, System Design, and more.

Mock Interviews

Test your skills in a simulated interview setting. Receive personalized feedback based on your performance. Available for Coding Interviews, System Design, and more.

AI Prompt

Build prompt engineering skills. Practice implementing AI-informed solutions.

Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

Explain

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AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

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Frequently Asked Questions

What does the Infosys coding interview focus on?

Infosys coding interviews assess logical thinking, problem-solving ability, and a solid grasp of programming fundamentals. They often include questions on algorithms, data structures, and basic optimization techniques.

Are there hidden test cases or partial scoring in the Infosys coding interview?

Yes. Your solution is tested against multiple hidden test cases. Some tests may offer partial scoring if your code handles a subset of the cases correctly, but you should aim for complete coverage by considering edge cases and constraints.

How is the Infosys interview process structured?

The process typically has two stages:

Online coding test (platform-based, often on Infosys’s own portal or HackerRank)
Technical and HR interviews for shortlisted candidates

Are Infosys coding interview questions beginner-friendly?

Compared to many top tech companies, Infosys questions are generally beginner-to-intermediate level. However, accuracy, clean code, and efficiency are still crucial for success.

Does Infosys use multiple-choice or purely coding questions?

The online round often mixes multiple-choice questions on programming concepts and aptitude with hands-on coding problems to test implementation skills.

What programming languages can I use during the Infosys coding round?

Infosys typically allows popular languages like C, C++, Java, and Python. It’s best to code in the language you’re most comfortable with to save time during the test.

Will Infosys ask domain-specific coding questions?

For fresher roles, most questions are general programming and logic-based. For experienced positions, expect domain-related coding challenges based on your resume and skillset.

What is unique about Infosys coding interviews?

Infosys often focuses on clarity of thought, clean syntax, and step-by-step logical reasoning, rather than just solving extremely hard algorithmic puzzles.

How much time is given for the Infosys coding test?

The coding section usually lasts 30–60 minutes, depending on the role and hiring track. Time management is critical since accuracy impacts your score heavily.

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