Deloitte vs TCS Interview Questions
Deloitte lists 43 LeetCode interview questions while TCS lists 228. They share 27 problems — 63% of Deloitte's bank and 12% of TCS's. Focus on the overlap first, then drill into 16 Deloitte-only and 201 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 27 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Deloitte and TCS.
Step 2 — Company-specific depth: Add Deloitte-specific problems like Change Null Values in a Table to the Previous Value, Minimum Time to Repair Cars, Nth Highest Salary 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
27 Shared Questions
High-priority problems to practice for both Deloitte and TCS.
| Problem | Difficulty |
|---|---|
| Merge k Sorted Lists | Hard |
| Two Sum | Easy |
| Second Highest Salary | Medium |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Longest Palindromic Substring | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Longest Common Prefix | Easy |
| Container With Most Water | Medium |
| Palindrome Number | Easy |
| Climbing Stairs | Easy |
| Valid Palindrome | Easy |
| Add Binary | Easy |
| Managers with at Least 5 Direct Reports | Medium |
| Merge Intervals | Medium |
| First Unique Character in a String | Easy |
| 3Sum | Medium |
| Maximum Subarray | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Group Anagrams | Medium |
| Max Consecutive Ones | Easy |
| Roman to Integer | Easy |
| Longest Consecutive Sequence | Medium |
| Rotate Array | Medium |
| Next Permutation | Medium |
| Valid Anagram | Easy |
| Subarray Sum Equals K | Medium |
Unique to Deloitte (16)
Problems in Deloitte's list that do not appear at TCS.
| Problem | Difficulty |
|---|---|
| Change Null Values in a Table to the Previous Value | Medium |
| Minimum Time to Repair Cars | Medium |
| Nth Highest Salary | Medium |
| Remove K Digits | Medium |
| Rising Temperature | Easy |
| Reverse Pairs | Hard |
| Edit Distance | Medium |
| Coin Change | Medium |
| Remove K-Balanced Substrings | Medium |
| Kth Largest Element in an Array | Medium |
| Split Array Largest Sum | Hard |
| Customers Who Never Order | Easy |
Unique to TCS (201)
Problems in TCS's list that do not appear at Deloitte.
| Problem | Difficulty |
|---|---|
| Friday Purchases I | Medium |
| Move Zeroes | Easy |
| Majority Element | Easy |
| Sort Colors | Medium |
| Find the Index of the First Occurrence in a String | Easy |
| Single Number | Easy |
| Median of Two Sorted Arrays | Hard |
| Reverse Integer | Medium |
| Jump Game | Medium |
| Contains Duplicate | Easy |
| Remove Letter To Equalize Frequency | Easy |
| Maximum Ascending Subarray Sum | Easy |
Frequently Asked Questions
How many LeetCode questions do Deloitte and TCS share?
Deloitte and TCS share 27 LeetCode interview questions. 16 problems appear only in Deloitte's list and 201 appear only in TCS's list.
What topics overlap most between Deloitte and TCS?
The most common shared topics between Deloitte and TCS are Array (14 shared questions), String (10 shared questions), Hash Table (8 shared questions), Two Pointers (7 shared questions), Math (5 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Deloitte or TCS?
Deloitte has 17 Easy, 23 Medium, and 3 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 Deloitte and TCS?
Start with the 27 shared problems since they cover what both companies ask most often. Then add 16 Deloitte-specific and 20 TCS-specific questions to round out your prep.