Cognizant vs Walmart Labs Interview Questions
Cognizant lists 29 LeetCode interview questions while Walmart Labs lists 144. They share 12 problems — 41% of Cognizant's bank and 8% of Walmart Labs's. Focus on the overlap first, then drill into 17 Cognizant-only and 132 Walmart Labs-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 12 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cognizant and Walmart Labs.
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 Walmart Labs-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Walmart Labs skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
12 Shared Questions
High-priority problems to practice for both Cognizant and Walmart Labs.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Palindromic Substring | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Longest Common Prefix | Easy |
| Maximum Subarray | Medium |
| Reverse Integer | Medium |
| Valid Parentheses | Easy |
| Median of Two Sorted Arrays | Hard |
| Longest Substring Without Repeating Characters | Medium |
| 3Sum | Medium |
| Move Zeroes | Easy |
| Rising Temperature | Easy |
Unique to Cognizant (17)
Problems in Cognizant's list that do not appear at Walmart Labs.
| Problem | Difficulty |
|---|---|
| Palindrome Number | Easy |
| Count Subarrays of Length Three With a Condition | Easy |
| Smallest Value of the Rearranged Number | Medium |
| Fibonacci Number | Easy |
| Valid Anagram | Easy |
| Second Highest Salary | Medium |
| Managers with at Least 5 Direct Reports | Medium |
| Product Sales Analysis I | Easy |
| Merge Sorted Array | Easy |
| Count Primes | Medium |
| Happy Number | Easy |
| Binary Search | Easy |
Unique to Walmart Labs (132)
Problems in Walmart Labs's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| Number of Islands | Medium |
| LRU Cache | Medium |
| Trapping Rain Water | Hard |
| Generate Parentheses | Medium |
| Merge Intervals | Medium |
| Search in Rotated Sorted Array | Medium |
| Divide Intervals Into Minimum Number of Groups | Medium |
| Middle of the Linked List | Easy |
| Maximum Number of Tasks You Can Assign | Hard |
| The Winner University | Easy |
| Count Good Triplets in an Array | Hard |
| XOR Operation in an Array | Easy |
Frequently Asked Questions
How many LeetCode questions do Cognizant and Walmart Labs share?
Cognizant and Walmart Labs share 12 LeetCode interview questions. 17 problems appear only in Cognizant's list and 132 appear only in Walmart Labs's list.
What topics overlap most between Cognizant and Walmart Labs?
The most common shared topics between Cognizant and Walmart Labs are Array (6 shared questions), Two Pointers (4 shared questions), String (4 shared questions), Hash Table (2 shared questions), Dynamic Programming (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or Walmart Labs?
Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. Walmart Labs has 22 Easy, 96 Medium, and 26 Hard questions. Walmart Labs has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cognizant and Walmart Labs?
Start with the 12 shared problems since they cover what both companies ask most often. Then add 17 Cognizant-specific and 20 Walmart Labs-specific questions to round out your prep.