Cognizant vs DE Shaw Interview Questions
Cognizant lists 29 LeetCode interview questions while DE Shaw lists 105. They share 5 problems — 17% of Cognizant's bank and 5% of DE Shaw's. Focus on the overlap first, then drill into 24 Cognizant-only and 100 DE Shaw-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 DE Shaw.
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 DE Shaw-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: DE Shaw 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 DE Shaw.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Valid Parentheses | Easy |
| Median of Two Sorted Arrays | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Merge Sorted Array | Easy |
Unique to Cognizant (24)
Problems in Cognizant's list that do not appear at DE Shaw.
Unique to DE Shaw (100)
Problems in DE Shaw's list that do not appear at Cognizant.
Frequently Asked Questions
How many LeetCode questions do Cognizant and DE Shaw share?
Cognizant and DE Shaw share 5 LeetCode interview questions. 24 problems appear only in Cognizant's list and 100 appear only in DE Shaw's list.
What topics overlap most between Cognizant and DE Shaw?
The most common shared topics between Cognizant and DE Shaw are Array (3 shared questions), Hash Table (2 shared questions), String (2 shared questions), Stack (1 shared questions), Binary Search (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or DE Shaw?
Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. DE Shaw has 11 Easy, 64 Medium, and 30 Hard questions. DE Shaw has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cognizant and DE Shaw?
Start with the 5 shared problems since they cover what both companies ask most often. Then add 20 Cognizant-specific and 20 DE Shaw-specific questions to round out your prep.