ByteDance vs Cognizant Interview Questions
ByteDance lists 64 LeetCode interview questions while Cognizant lists 29. They share 6 problems — 9% of ByteDance's bank and 21% of Cognizant's. Focus on the overlap first, then drill into 58 ByteDance-only and 23 Cognizant-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 6 overlapping problems first. These are the highest-yield questions for candidates interviewing at both ByteDance and Cognizant.
Step 2 — Company-specific depth: Add ByteDance-specific problems like LRU Cache, Remove Duplicate Letters, Smallest Subsequence of Distinct Characters and Cognizant-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: ByteDance skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
6 Shared Questions
High-priority problems to practice for both ByteDance and Cognizant.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Add Two Numbers | Medium |
| Maximum Subarray | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Longest Palindromic Substring | Medium |
| Valid Parentheses | Easy |
Unique to ByteDance (58)
Problems in ByteDance's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Remove Duplicate Letters | Medium |
| Smallest Subsequence of Distinct Characters | Medium |
| First Day Where You Have Been in All the Rooms | Medium |
| Number of Islands | Medium |
| Course Schedule | Medium |
| Combination Sum | Medium |
| Basic Calculator II | Medium |
| Merge Intervals | Medium |
| Shortest Bridge | Medium |
| House Robber | Medium |
| Maximal Square | Medium |
Unique to Cognizant (23)
Problems in Cognizant's list that do not appear at ByteDance.
Frequently Asked Questions
How many LeetCode questions do ByteDance and Cognizant share?
ByteDance and Cognizant share 6 LeetCode interview questions. 58 problems appear only in ByteDance's list and 23 appear only in Cognizant's list.
What topics overlap most between ByteDance and Cognizant?
The most common shared topics between ByteDance and Cognizant are String (3 shared questions), Array (2 shared questions), Hash Table (2 shared questions), Dynamic Programming (2 shared questions), Linked List (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: ByteDance or Cognizant?
ByteDance has 4 Easy, 51 Medium, and 9 Hard questions. Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. ByteDance has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both ByteDance and Cognizant?
Start with the 6 shared problems since they cover what both companies ask most often. Then add 20 ByteDance-specific and 20 Cognizant-specific questions to round out your prep.