Oracle vs TCS Interview Questions
Oracle lists 314 LeetCode interview questions while TCS lists 228. They share 102 problems — 32% of Oracle's bank and 45% of TCS's. Focus on the overlap first, then drill into 212 Oracle-only and 126 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 102 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Oracle and TCS.
Step 2 — Company-specific depth: Add Oracle-specific problems like Meeting Rooms II, Minimum One Bit Operations to Make Integers Zero, LFU Cache and TCS-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Oracle skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
102 Shared Questions
High-priority problems to practice for both Oracle and TCS.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Number of Islands | Medium |
| Two Sum | Easy |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Sliding Window Maximum | Hard |
| Valid Parentheses | Easy |
| Merge k Sorted Lists | Hard |
| Merge Intervals | Medium |
| Longest Palindromic Substring | Medium |
| Spiral Matrix | Medium |
| Search in Rotated Sorted Array | Medium |
| Container With Most Water | Medium |
| 3Sum | Medium |
| Reverse Linked List | Easy |
| Trapping Rain Water | Hard |
| Longest Consecutive Sequence | Medium |
| Min Stack | Medium |
| Valid Anagram | Easy |
| Rotting Oranges | Medium |
| Maximum Subarray | Medium |
| Roman to Integer | Easy |
| Koko Eating Bananas | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Generate Parentheses | Medium |
| Longest Common Prefix | Easy |
| Sort Colors | Medium |
| Median of Two Sorted Arrays | Hard |
| Diameter of Binary Tree | Easy |
Showing top 30 of 102 shared problems.
Unique to Oracle (212)
Problems in Oracle's list that do not appear at TCS.
Unique to TCS (126)
Problems in TCS's list that do not appear at Oracle.
Frequently Asked Questions
How many LeetCode questions do Oracle and TCS share?
Oracle and TCS share 102 LeetCode interview questions. 212 problems appear only in Oracle's list and 126 appear only in TCS's list.
What topics overlap most between Oracle and TCS?
The most common shared topics between Oracle and TCS are Array (19 shared questions), Hash Table (8 shared questions), String (8 shared questions), Sorting (6 shared questions), Two Pointers (5 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Oracle or TCS?
Oracle has 61 Easy, 194 Medium, and 59 Hard questions. TCS has 99 Easy, 108 Medium, and 21 Hard questions. Oracle has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Oracle and TCS?
Start with the 102 shared problems since they cover what both companies ask most often. Then add 20 Oracle-specific and 20 TCS-specific questions to round out your prep.