Landing a software developer job in India has become increasingly competitive in 2026. Whether you're targeting service-based giants like TCS, Infosys, and Wipro, or aiming for product-based companies like Amazon, Microsoft, and Flipkart, coding interviews remain the biggest hurdle for most candidates.

The Indian tech hiring landscape demands strong problem-solving skills and solid understanding of data structures and algorithms. Companies now expect candidates to think logically, write clean code, and explain their approach clearly—all within tight time constraints.

This comprehensive guide presents the top 100 coding interview questions asked by Indian companies in 2026, organized by topic and difficulty level. More importantly, it teaches you how interviewers evaluate your solutions and what preparation strategy actually works.

Coding Interview Pattern in Indian Companies

Understanding the interview structure helps you prepare effectively:

Online Coding Tests: Most companies start with automated coding assessments on platforms like HackerRank, CodeVita, or Cocubes. These tests typically include 2-4 problems to solve within 60-90 minutes.

Technical Interview Rounds: Successful candidates face 1-3 technical rounds where they solve DSA problems on a whiteboard, shared screen, or coding environment. Interviewers assess both correctness and explanation quality.

HR and Managerial Rounds: Final rounds evaluate communication skills, cultural fit, and salary expectations. Some companies include system design discussions for experienced roles.

How to Use This List of 100 Coding Interview Questions

This is not a memorization checklist. Each question represents a specific problem-solving pattern. Your goal should be understanding the underlying logic rather than remembering exact solutions.

Focus on recognizing patterns across similar problems. For example, once you master the two-pointer technique for arrays, you can apply it to multiple questions with minor variations.

Practice explaining your thought process out loud. Indian interviewers value candidates who can communicate their approach step-by-step, even if the final solution has minor bugs.

Top 100 Coding Interview Questions

Arrays & Strings (20 Questions)

Easy:

1. Find the largest element in an array
2. Reverse a string
3. Check if a string is a palindrome
4. Find the second largest element
5. Remove duplicates from a sorted array
6. Merge two sorted arrays
7. Check if two strings are anagrams
8. Find missing number in array (1 to N)
9. Rotate array by K positions
10. Find the first repeating element

Medium: 11. Longest substring without repeating characters 12. Container with most water 13. Subarray with given sum 14. Longest consecutive sequence 15. Group anagrams together 16. Next permutation 17. Trapping rainwater problem 18. Product of array except self

Hard: 19. Median of two sorted arrays 20. Minimum window substring

Linked Lists (12 Questions)

Easy: 21. Reverse a linked list 22. Detect cycle in linked list 23. Find middle of linked list 24. Merge two sorted linked lists 25. Remove duplicates from sorted list

Medium: 26. Add two numbers represented by linked lists 27. Remove Nth node from end 28. Intersection point of two linked lists 29. Clone a linked list with random pointers 30. Sort a linked list

Hard: 31. Reverse nodes in K-group 32. Merge K sorted linked lists

Stacks & Queues (10 Questions)

Easy: 33. Implement stack using arrays 34. Implement queue using stacks 35. Valid parentheses checker 36. Next greater element

Medium: 37. Implement Min Stack 38. Largest rectangle in histogram 39. LRU Cache implementation 40. Evaluate postfix expression 41. Stock span problem 42. Sliding window maximum

Trees & Graphs (18 Questions)

Easy: 43. Binary tree traversals (inorder, preorder, postorder) 44. Height of binary tree 45. Diameter of binary tree 46. Check if two trees are identical 47. Level order traversal

Medium: 48. Lowest common ancestor 49. Validate binary search tree 50. Serialize and deserialize binary tree 51. Top view of binary tree 52. Vertical order traversal 53. Binary tree to doubly linked list 54. Number of islands (graph) 55. Detect cycle in directed graph 56. Clone a graph 57. Topological sort

Hard: 58. Binary tree maximum path sum 59. Word ladder problem 60. Alien dictionary

Recursion & Backtracking (10 Questions)

Easy: 61. Print all permutations of a string 62. Generate all subsets 63. Tower of Hanoi

Medium: 64. N-Queens problem 65. Sudoku solver 66. Combination sum 67. Word search in matrix 68. Rat in a maze 69. Generate valid parentheses

Hard: 70. Palindrome partitioning

Searching & Sorting (12 Questions)

Easy: 71. Binary search implementation 72. Find first and last position in sorted array 73. Search in rotated sorted array 74. Square root using binary search

Medium: 75. Merge sort implementation 76. Quick sort implementation 77. Kth largest element 78. Count inversions in array 79. Aggressive cows problem 80. Search in 2D matrix 81. Median in a stream 82. Find peak element

Dynamic Programming (13 Questions)

Easy: 83. Fibonacci series 84. Climbing stairs 85. Maximum subarray sum (Kadane's algorithm)

Medium: 86. Longest increasing subsequence 87. Coin change problem 88. 0/1 Knapsack problem 89. Longest common subsequence 90. Edit distance 91. Matrix chain multiplication 92. Partition equal subset sum 93. Egg dropping puzzle

Hard: 94. Longest palindromic subsequence 95. Word break problem

Basic Math & Logic (5 Questions)

Easy: 96. Check if number is prime 97. GCD of two numbers 98. Count set bits in integer 99. Power of two check 100. Reverse integer

Company-Wise Coding Interview Patterns

Service-Based Companies (TCS, Infosys, Wipro, Cognizant): Focus on easy to medium difficulty questions. Expect array manipulation, string problems, and basic recursion. Coding tests usually include 2-3 problems with 60-90 minutes time limit.

Product-Based Companies (Amazon, Microsoft, Google, Flipkart, Paytm): Emphasize medium to hard problems requiring optimal solutions. Dynamic programming, graph algorithms, and tree traversals are frequently asked. Multiple technical rounds with increasing difficulty.

Startups (Razorpay, CRED, Swiggy, Zomato): Mix of practical coding and DSA questions. Expect real-world problem scenarios alongside algorithmic challenges. Strong emphasis on code quality and system design thinking.

How Interviewers Evaluate Coding Skills

Indian technical interviewers look beyond just working code:

Problem-Solving Approach: Can you break down complex problems into smaller steps? Do you ask clarifying questions before jumping into code?

Code Clarity: Is your code readable with proper variable names? Do you follow consistent formatting?

Time & Space Complexity: Can you analyze and optimize your solution? Do you understand Big O notation practically?

Communication Skills: Can you explain your thought process while coding? Do you handle hints and feedback constructively?

Common Coding Interview Mistakes

Memorizing Solutions: Interviewers can easily spot memorized answers. They'll modify the problem slightly, and memorizers struggle to adapt.

Ignoring Edge Cases: Always test your code mentally for empty inputs, single elements, or maximum constraints before claiming completion.

Poor Explanation: Silence while coding raises red flags. Verbalize your thinking—it shows confidence and helps interviewers guide you if stuck.

How to Prepare for Coding Interviews in 2026

Daily Practice Strategy: Solve 2-3 problems daily rather than 20 problems once a week. Consistency builds pattern recognition better than cramming.

Using LeetCode Effectively: Start with easy problems to build confidence. Gradually move to medium difficulty. Don't rush to hard problems—medium-level mastery matters more for most Indian companies.

Mock Interviews: Practice explaining solutions to friends or use online platforms. Real interview pressure is different from solo practice.

Focus on understanding solutions deeply. If you solved a problem in 45 minutes, spend another 30 minutes studying optimal approaches and alternative methods.

Conclusion

Cracking coding interviews in India requires structured preparation, consistent practice, and pattern recognition skills. These 100 questions cover the most frequently asked topics across Indian companies in 2026.

Remember that interviewers value problem-solving ability over memorized solutions. Understanding why an approach works matters more than knowing the exact code.

Start your preparation today with a clear plan. Pick one topic, master it completely, then move to the next. Consistency beats intensity every single time.

Frequently Asked Questions

What coding interview questions are most asked in India? Array manipulation, string problems, linked list operations, and binary tree traversals are the most frequently asked questions across both service-based and product-based Indian companies.

Is LeetCode enough for Indian interviews? LeetCode provides excellent practice problems, but understanding concepts through multiple resources works best. Combine LeetCode with books like "Cracking the Coding Interview" and Indian platform practice tests for comprehensive preparation.

How many DSA questions should I practice? Quality matters more than quantity. Thoroughly solving and understanding 200-300 problems across all major topics prepares you better than superficially attempting 1000 problems. Focus on pattern recognition rather than counting problems.