Cisco vs TCS Interview Questions
Cisco lists 87 LeetCode interview questions while TCS lists 228. They share 47 problems — 54% of Cisco's bank and 21% of TCS's. Focus on the overlap first, then drill into 40 Cisco-only and 181 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 47 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cisco and TCS.
Step 2 — Company-specific depth: Add Cisco-specific problems like Predict the Winner, Lucky Numbers in a Matrix, Snakes and Ladders and TCS-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Cisco skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
47 Shared Questions
High-priority problems to practice for both Cisco and TCS.
| Problem | Difficulty |
|---|---|
| Longest Palindromic Substring | Medium |
| House Robber | Medium |
| Rotate Image | Medium |
| Spiral Matrix | Medium |
| Fizz Buzz | Easy |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Maximum Subarray | Medium |
| Happy Number | Easy |
| Two Sum | Easy |
| Valid Parentheses | Easy |
| Trapping Rain Water | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Linked List Cycle | Easy |
| Merge Sorted Array | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Letter Combinations of a Phone Number | Medium |
| Number of Islands | Medium |
| Move Zeroes | Easy |
| Reverse Linked List | Easy |
| Search a 2D Matrix | Medium |
| 3Sum | Medium |
| Longest Consecutive Sequence | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Permutation in String | Medium |
| Add Two Numbers | Medium |
| Single Number | Easy |
| Group Anagrams | Medium |
| Valid Palindrome | Easy |
| Top K Frequent Elements | Medium |
Showing top 30 of 47 shared problems.
Unique to Cisco (40)
Problems in Cisco's list that do not appear at TCS.
Unique to TCS (181)
Problems in TCS's list that do not appear at Cisco.
| Problem | Difficulty |
|---|---|
| Friday Purchases I | Medium |
| Palindrome Number | 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 |
| Second Highest Salary | Medium |
| Rotate Array | Medium |
| Median of Two Sorted Arrays | Hard |
| Container With Most Water | Medium |
| Reverse Integer | Medium |
Frequently Asked Questions
How many LeetCode questions do Cisco and TCS share?
Cisco and TCS share 47 LeetCode interview questions. 40 problems appear only in Cisco's list and 181 appear only in TCS's list.
What topics overlap most between Cisco and TCS?
The most common shared topics between Cisco and TCS are Array (18 shared questions), Two Pointers (10 shared questions), Hash Table (10 shared questions), String (8 shared questions), Dynamic Programming (5 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cisco or TCS?
Cisco has 24 Easy, 50 Medium, and 13 Hard questions. TCS has 99 Easy, 108 Medium, and 21 Hard questions. Cisco has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cisco and TCS?
Start with the 47 shared problems since they cover what both companies ask most often. Then add 20 Cisco-specific and 20 TCS-specific questions to round out your prep.