Apple vs TCS Interview Questions
Apple lists 300 LeetCode interview questions while TCS lists 228. They share 104 problems — 35% of Apple's bank and 46% of TCS's. Focus on the overlap first, then drill into 196 Apple-only and 124 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 104 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Apple and TCS.
Step 2 — Company-specific depth: Add Apple-specific problems like Design Hit Counter, Valid Sudoku, Course Schedule II and TCS-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Apple skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
104 Shared Questions
High-priority problems to practice for both Apple and TCS.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Two Sum | Easy |
| Number of Islands | Medium |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Longest Common Prefix | Easy |
| Rotate Array | Medium |
| Reverse Linked List | Easy |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Product of Array Except Self | Medium |
| Valid Palindrome | Easy |
| Rotate Image | Medium |
| Reverse Words in a String | Medium |
| Spiral Matrix | Medium |
| Best Time to Buy and Sell Stock II | Medium |
| Maximum Subarray | Medium |
| Reverse Integer | Medium |
| Merge k Sorted Lists | Hard |
| Trapping Rain Water | Hard |
| Subarray Sum Equals K | Medium |
| Subarray Product Less Than K | Medium |
| Median of Two Sorted Arrays | Hard |
| Find First and Last Position of Element in Sorted Array | Medium |
| Merge Two Sorted Lists | Easy |
| Move Zeroes | Easy |
| Word Ladder | Hard |
| Min Stack | Medium |
Showing top 30 of 104 shared problems.
Unique to Apple (196)
Problems in Apple's list that do not appear at TCS.
| Problem | Difficulty |
|---|---|
| Design Hit Counter | Medium |
| Valid Sudoku | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Kth Largest Element in an Array | Medium |
| Meeting Rooms II | Medium |
| Time Based Key-Value Store | Medium |
| Lowest Common Ancestor of a Binary Tree | Medium |
| Reverse Bits | Easy |
| Snapshot Array | Medium |
| Design Circular Queue | Medium |
| Number of 1 Bits | Easy |
Unique to TCS (124)
Problems in TCS's list that do not appear at Apple.
Frequently Asked Questions
How many LeetCode questions do Apple and TCS share?
Apple and TCS share 104 LeetCode interview questions. 196 problems appear only in Apple's list and 124 appear only in TCS's list.
What topics overlap most between Apple and TCS?
The most common shared topics between Apple and TCS are Array (19 shared questions), Hash Table (7 shared questions), String (7 shared questions), Two Pointers (5 shared questions), Linked List (4 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Apple or TCS?
Apple has 76 Easy, 178 Medium, and 46 Hard questions. TCS has 99 Easy, 108 Medium, and 21 Hard questions. Apple has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Apple and TCS?
Start with the 104 shared problems since they cover what both companies ask most often. Then add 20 Apple-specific and 20 TCS-specific questions to round out your prep.