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TCS Coding Interview Questions

We track 219 coding questions asked at TCS, tagged with the algorithms and concepts they test. The most common: Array, String, Hash Table, Math, Two Pointers.

Browse all 219 TCS questions →

Concept mix

Each question's weight is split evenly across its concepts, so the shares sum to 100%.

Array — 20.5%String — 9.7%Math — 7.7%Database — 7.4%Two Pointers — 6.2%Hash Table — 6.0%Dynamic Programming — 5.8%Binary Search — 4.5%Sorting — 4.2%Linked List — 3.4%Other (40) — 25.0%

How many questions involve each concept

Share of all 219 tracked TCS questions that touch each concept. Questions usually involve several, so these overlap.

Where TCS differs from the average company

Concept weight at TCS relative to the average across all companies we track. Green means TCS leans on it harder than most.

TCS specialties

Concepts that show up at TCS but are rarely asked elsewhere. They are easy to get blindsided by.

Difficulty mix

Level split of the 219 tracked TCS questions.

  • Junior43% (95)
  • Mid/Senior47% (103)
  • Staff10% (21)

Every concept in TCS interviews

ConceptQuestions% of questionsShare of mix
Array11954.3%20.5%
String4520.5%9.7%
Hash Table4319.6%6.0%
Math3817.4%7.7%
Two Pointers3817.4%6.2%
Dynamic Programming3516.0%5.8%
Sorting3315.1%4.2%
Binary Search2712.3%4.5%
Database167.3%7.4%
Linked List167.3%3.4%
Matrix135.9%1.8%
Stack125.5%1.9%
Bit Manipulation115.0%1.5%
Greedy104.6%1.4%
Recursion104.6%1.6%
Simulation104.6%1.6%
Sliding Window104.6%1.4%
Heap (Priority Queue)94.1%0.9%
Counting83.7%1.0%
Prefix Sum83.7%1.3%
Backtracking73.2%1.2%
Depth-First Search73.2%0.8%
Binary Tree62.7%0.7%
Divide and Conquer62.7%0.7%
Tree62.7%0.7%
Breadth-First Search52.3%0.6%
Monotonic Stack52.3%0.6%
Design41.8%0.6%
String Matching41.8%0.8%
Queue31.4%0.3%
Bitmask20.9%0.2%
Brainteaser20.9%0.3%
Bucket Sort20.9%0.2%
Counting Sort20.9%0.2%
Memoization20.9%0.3%
Merge Sort20.9%0.2%
Number Theory20.9%0.3%
Radix Sort20.9%0.2%
Union-Find20.9%0.2%
Binary Search Tree10.5%0.1%
Combinatorics10.5%0.2%
Doubly-Linked List10.5%0.1%
Enumeration10.5%0.1%
Game Theory10.5%0.1%
Geometry10.5%0.2%
Graph Theory10.5%0.1%
Interactive10.5%0.2%
Monotonic Queue10.5%0.1%
Shortest Path10.5%0.1%
Trie10.5%0.2%

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