Cognizant vs Infosys Interview Questions
Cognizant lists 29 LeetCode interview questions while Infosys lists 105. They share 19 problems — 66% of Cognizant's bank and 18% of Infosys's. Focus on the overlap first, then drill into 10 Cognizant-only and 86 Infosys-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 19 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cognizant and Infosys.
Step 2 — Company-specific depth: Add Cognizant-specific problems like Count Subarrays of Length Three With a Condition, Smallest Value of the Rearranged Number, Managers with at Least 5 Direct Reports and Infosys-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Infosys skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
19 Shared Questions
High-priority problems to practice for both Cognizant and Infosys.
| Problem | Difficulty |
|---|---|
| Palindrome Number | Easy |
| Two Sum | Easy |
| Fibonacci Number | Easy |
| Longest Palindromic Substring | Medium |
| Valid Anagram | Easy |
| Second Highest Salary | 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 |
| Merge Sorted Array | Easy |
| 3Sum | Medium |
| Move Zeroes | Easy |
| Binary Search | Easy |
| Merge Two Sorted Lists | Easy |
| Add Two Numbers | Medium |
Unique to Cognizant (10)
Problems in Cognizant's list that do not appear at Infosys.
| Problem | Difficulty |
|---|---|
| Count Subarrays of Length Three With a Condition | Easy |
| Smallest Value of the Rearranged Number | Medium |
| Managers with at Least 5 Direct Reports | Medium |
| Product Sales Analysis I | Easy |
| Count Primes | Medium |
| Happy Number | Easy |
| Fizz Buzz | Easy |
| Rising Temperature | Easy |
| Students and Examinations | Easy |
| Search Insert Position | Easy |
Unique to Infosys (86)
Problems in Infosys's list that do not appear at Cognizant.
Frequently Asked Questions
How many LeetCode questions do Cognizant and Infosys share?
Cognizant and Infosys share 19 LeetCode interview questions. 10 problems appear only in Cognizant's list and 86 appear only in Infosys's list.
What topics overlap most between Cognizant and Infosys?
The most common shared topics between Cognizant and Infosys are Array (8 shared questions), Two Pointers (5 shared questions), String (5 shared questions), Math (4 shared questions), Hash Table (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or Infosys?
Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. Infosys has 32 Easy, 57 Medium, and 16 Hard questions. Infosys has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cognizant and Infosys?
Start with the 19 shared problems since they cover what both companies ask most often. Then add 10 Cognizant-specific and 20 Infosys-specific questions to round out your prep.