Intel vs TCS Interview Questions
Intel lists 25 LeetCode interview questions while TCS lists 228. They share 22 problems — 88% of Intel's bank and 10% of TCS's. Focus on the overlap first, then drill into 3 Intel-only and 206 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 22 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Intel and TCS.
Step 2 — Company-specific depth: Add Intel-specific problems like Find Consecutive Integers from a Data Stream, Copy List with Random Pointer, Top K Frequent Words and TCS-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: TCS skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
22 Shared Questions
High-priority problems to practice for both Intel and TCS.
| Problem | Difficulty |
|---|---|
| Trapping Rain Water | Hard |
| Maximum Nesting Depth of the Parentheses | Easy |
| Valid Parentheses | Easy |
| Number of Islands | Medium |
| Two Sum | Easy |
| Count Primes | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock II | Medium |
| LRU Cache | Medium |
| Reverse Integer | Medium |
| Maximum Subarray | Medium |
| Climbing Stairs | Easy |
| Merge Two Sorted Lists | Easy |
| Reverse Words in a String | Medium |
| Add Two Numbers | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Palindrome Number | Easy |
| Container With Most Water | Medium |
| Merge Sorted Array | Easy |
| Rotate Image | Medium |
| Linked List Cycle | Easy |
| Valid Palindrome | Easy |
Unique to Intel (3)
Problems in Intel's list that do not appear at TCS.
| Problem | Difficulty |
|---|---|
| Find Consecutive Integers from a Data Stream | Medium |
| Copy List with Random Pointer | Medium |
| Top K Frequent Words | Medium |
Unique to TCS (206)
Problems in TCS's list that do not appear at Intel.
| Problem | Difficulty |
|---|---|
| Friday Purchases I | Medium |
| Longest Palindromic Substring | Medium |
| Move Zeroes | Easy |
| Majority Element | Easy |
| Longest Common Prefix | Easy |
| Sort Colors | Medium |
| Valid Anagram | Easy |
| Find the Index of the First Occurrence in a String | Easy |
| Single Number | Easy |
| Second Highest Salary | Medium |
| Subarray Sum Equals K | Medium |
| Rotate Array | Medium |
Frequently Asked Questions
How many LeetCode questions do Intel and TCS share?
Intel and TCS share 22 LeetCode interview questions. 3 problems appear only in Intel's list and 206 appear only in TCS's list.
What topics overlap most between Intel and TCS?
The most common shared topics between Intel and TCS are Array (10 shared questions), Two Pointers (6 shared questions), Math (6 shared questions), Dynamic Programming (5 shared questions), String (5 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Intel or TCS?
Intel has 10 Easy, 14 Medium, and 1 Hard questions. TCS has 99 Easy, 108 Medium, and 21 Hard questions. TCS has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Intel and TCS?
Start with the 22 shared problems since they cover what both companies ask most often. Then add 3 Intel-specific and 20 TCS-specific questions to round out your prep.