Cognizant vs eBay Interview Questions
Cognizant lists 29 LeetCode interview questions while eBay lists 62. They share 5 problems — 17% of Cognizant's bank and 8% of eBay's. Focus on the overlap first, then drill into 24 Cognizant-only and 57 eBay-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 eBay.
Step 2 — Company-specific depth: Add Cognizant-specific problems like Palindrome Number, Count Subarrays of Length Three With a Condition, Smallest Value of the Rearranged Number and eBay-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: eBay 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 eBay.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Palindromic Substring | Medium |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| 3Sum | Medium |
Unique to Cognizant (24)
Problems in Cognizant's list that do not appear at eBay.
Unique to eBay (57)
Problems in eBay's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Remove One Element to Make the Array Strictly Increasing | Easy |
| Alternating Digit Sum | Easy |
| Partition Equal Subset Sum | Medium |
| Binary Gap | Easy |
| Minimize Maximum Pair Sum in Array | Medium |
| Minimum Window Subsequence | Hard |
| Design Skiplist | Hard |
| Subtree of Another Tree | Easy |
| Spiral Matrix | Medium |
| Top K Frequent Elements | Medium |
| Open the Lock | Medium |
Frequently Asked Questions
How many LeetCode questions do Cognizant and eBay share?
Cognizant and eBay share 5 LeetCode interview questions. 24 problems appear only in Cognizant's list and 57 appear only in eBay's list.
What topics overlap most between Cognizant and eBay?
The most common shared topics between Cognizant and eBay are String (3 shared questions), Array (2 shared questions), Hash Table (2 shared questions), Two Pointers (2 shared questions), Dynamic Programming (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or eBay?
Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. eBay has 10 Easy, 39 Medium, and 13 Hard questions. eBay has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cognizant and eBay?
Start with the 5 shared problems since they cover what both companies ask most often. Then add 20 Cognizant-specific and 20 eBay-specific questions to round out your prep.