Cognizant vs Tesla Interview Questions
Cognizant lists 29 LeetCode interview questions while Tesla lists 41. They share 8 problems — 28% of Cognizant's bank and 20% of Tesla's. Focus on the overlap first, then drill into 21 Cognizant-only and 33 Tesla-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 8 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cognizant and Tesla.
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 Tesla-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Tesla skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
8 Shared Questions
High-priority problems to practice for both Cognizant and Tesla.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Valid Anagram | Easy |
| Maximum Subarray | Medium |
| Valid Parentheses | Easy |
| Median of Two Sorted Arrays | Hard |
| Longest Substring Without Repeating Characters | Medium |
| 3Sum | Medium |
| Happy Number | Easy |
Unique to Cognizant (21)
Problems in Cognizant's list that do not appear at Tesla.
Unique to Tesla (33)
Problems in Tesla's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| Merge Intervals | Medium |
| Minimum Changes To Make Alternating Binary String | Easy |
| Find Followers Count | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Number of Islands | Medium |
| Basic Calculator II | Medium |
| Building H2O | Medium |
| Design Circular Queue | Medium |
| Reorganize String | Medium |
| Trapping Rain Water | Hard |
| Rectangle Area | Medium |
| LRU Cache | Medium |
Frequently Asked Questions
How many LeetCode questions do Cognizant and Tesla share?
Cognizant and Tesla share 8 LeetCode interview questions. 21 problems appear only in Cognizant's list and 33 appear only in Tesla's list.
What topics overlap most between Cognizant and Tesla?
The most common shared topics between Cognizant and Tesla are Array (4 shared questions), Hash Table (4 shared questions), String (3 shared questions), Sorting (2 shared questions), Divide and Conquer (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or Tesla?
Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. Tesla has 10 Easy, 26 Medium, and 5 Hard questions. Tesla has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cognizant and Tesla?
Start with the 8 shared problems since they cover what both companies ask most often. Then add 20 Cognizant-specific and 20 Tesla-specific questions to round out your prep.