Cognizant vs Yahoo Interview Questions
Cognizant lists 29 LeetCode interview questions while Yahoo lists 34. They share 5 problems — 17% of Cognizant's bank and 15% of Yahoo's. Focus on the overlap first, then drill into 24 Cognizant-only and 29 Yahoo-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 5 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cognizant and Yahoo.
Step 2 — Company-specific depth: Add Cognizant-specific problems like Count Subarrays of Length Three With a Condition, Smallest Value of the Rearranged Number, Fibonacci Number and Yahoo-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Yahoo skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
5 Shared Questions
High-priority problems to practice for both Cognizant and Yahoo.
| Problem | Difficulty |
|---|---|
| Palindrome Number | Easy |
| Two Sum | Easy |
| Longest Common Prefix | Easy |
| Valid Parentheses | Easy |
| Median of Two Sorted Arrays | Hard |
Unique to Cognizant (24)
Problems in Cognizant's list that do not appear at Yahoo.
Unique to Yahoo (29)
Problems in Yahoo's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Maximum Depth of Binary Tree | Easy |
| Reverse Linked List | Easy |
| Contains Duplicate | Easy |
| Serialize and Deserialize Binary Tree | Hard |
| Largest Palindrome Product | Hard |
| Roman to Integer | Easy |
| Word Break | Medium |
| Linked List Cycle | Easy |
| Matrix Cells in Distance Order | Easy |
| Non-decreasing Subsequences | Medium |
| Maximum Distance in Arrays | Medium |
Frequently Asked Questions
How many LeetCode questions do Cognizant and Yahoo share?
Cognizant and Yahoo share 5 LeetCode interview questions. 24 problems appear only in Cognizant's list and 29 appear only in Yahoo's list.
What topics overlap most between Cognizant and Yahoo?
The most common shared topics between Cognizant and Yahoo are Array (2 shared questions), String (2 shared questions), Math (1 shared questions), Hash Table (1 shared questions), Trie (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or Yahoo?
Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. Yahoo has 11 Easy, 20 Medium, and 3 Hard questions. Yahoo has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cognizant and Yahoo?
Start with the 5 shared problems since they cover what both companies ask most often. Then add 20 Cognizant-specific and 20 Yahoo-specific questions to round out your prep.