Infosys vs TikTok Interview Questions
Infosys lists 105 LeetCode interview questions while TikTok lists 351. They share 51 problems — 49% of Infosys's bank and 15% of TikTok's. Focus on the overlap first, then drill into 54 Infosys-only and 300 TikTok-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 51 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Infosys and TikTok.
Step 2 — Company-specific depth: Add Infosys-specific problems like Maximum Good Subtree Score, Find Building Where Alice and Bob Can Meet, Minimum Reverse Operations and TikTok-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: TikTok skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
51 Shared Questions
High-priority problems to practice for both Infosys and TikTok.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Valid Parentheses | Easy |
| Next Permutation | Medium |
| Maximum Subarray | Medium |
| Rotate Image | Medium |
| Trapping Rain Water | Hard |
| Longest Common Prefix | Easy |
| Merge Intervals | Medium |
| Generate Parentheses | Medium |
| Spiral Matrix | Medium |
| Rotate Array | Medium |
| Coin Change | Medium |
| 3Sum | Medium |
| Group Anagrams | Medium |
| Move Zeroes | Easy |
| Reverse Words in a String | Medium |
| Two Sum II - Input Array Is Sorted | Medium |
| Add Two Numbers | Medium |
| Kth Largest Element in an Array | Medium |
| Longest Palindromic Substring | Medium |
| Climbing Stairs | Easy |
| House Robber | Medium |
| Gas Station | Medium |
| Sqrt(x) | Easy |
| Reverse Nodes in k-Group | Hard |
| Number of Islands | Medium |
| Longest Consecutive Sequence | Medium |
| Merge Two Sorted Lists | Easy |
Showing top 30 of 51 shared problems.
Unique to Infosys (54)
Problems in Infosys's list that do not appear at TikTok.
Unique to TikTok (300)
Problems in TikTok's list that do not appear at Infosys.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Longest Increasing Subsequence | Medium |
| Number of Distinct Islands | Medium |
| Meeting Rooms II | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Subarray With Elements Greater Than Varying Threshold | Hard |
| Text Justification | Hard |
| Decode String | Medium |
| Word Search | Medium |
| N-Queens | Hard |
| Top K Frequent Elements | Medium |
Frequently Asked Questions
How many LeetCode questions do Infosys and TikTok share?
Infosys and TikTok share 51 LeetCode interview questions. 54 problems appear only in Infosys's list and 300 appear only in TikTok's list.
What topics overlap most between Infosys and TikTok?
The most common shared topics between Infosys and TikTok are Array (19 shared questions), Dynamic Programming (8 shared questions), Two Pointers (8 shared questions), String (7 shared questions), Math (5 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Infosys or TikTok?
Infosys has 32 Easy, 57 Medium, and 16 Hard questions. TikTok has 34 Easy, 245 Medium, and 72 Hard questions. TikTok has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Infosys and TikTok?
Start with the 51 shared problems since they cover what both companies ask most often. Then add 20 Infosys-specific and 20 TikTok-specific questions to round out your prep.