Cognizant vs Yandex Interview Questions
Cognizant lists 29 LeetCode interview questions while Yandex lists 128. They share 16 problems — 55% of Cognizant's bank and 13% of Yandex's. Focus on the overlap first, then drill into 13 Cognizant-only and 112 Yandex-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 16 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cognizant and Yandex.
Step 2 — Company-specific depth: Add Cognizant-specific problems like Count Subarrays of Length Three With a Condition, Smallest Value of the Rearranged Number, Fibonacci Number and Yandex-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Yandex skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
16 Shared Questions
High-priority problems to practice for both Cognizant and Yandex.
| Problem | Difficulty |
|---|---|
| Palindrome Number | Easy |
| Two Sum | Easy |
| Longest Palindromic Substring | Medium |
| Valid Anagram | Easy |
| Remove Duplicates from Sorted Array | 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 |
| Move Zeroes | Easy |
| Binary Search | Easy |
| Merge Two Sorted Lists | Easy |
| Add Two Numbers | Medium |
| Search Insert Position | Easy |
Unique to Cognizant (13)
Problems in Cognizant's list that do not appear at Yandex.
| Problem | Difficulty |
|---|---|
| Count Subarrays of Length Three With a Condition | Easy |
| Smallest Value of the Rearranged Number | Medium |
| Fibonacci Number | Easy |
| Second Highest Salary | Medium |
| Longest Common Prefix | Easy |
| Managers with at Least 5 Direct Reports | Medium |
| Product Sales Analysis I | Easy |
| Count Primes | Medium |
| 3Sum | Medium |
| Happy Number | Easy |
| Fizz Buzz | Easy |
| Rising Temperature | Easy |
Unique to Yandex (112)
Problems in Yandex's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| Longest Subarray of 1's After Deleting One Element | Medium |
| Summary Ranges | Easy |
| Maximize Distance to Closest Person | Medium |
| Find K Closest Elements | Medium |
| Subarray Sum Equals K | Medium |
| String Compression | Medium |
| Merge Intervals | Medium |
| Valid Palindrome II | Easy |
| One Edit Distance | Medium |
| Permutation in String | Medium |
| Isomorphic Strings | Easy |
| Line Reflection | Medium |
Frequently Asked Questions
How many LeetCode questions do Cognizant and Yandex share?
Cognizant and Yandex share 16 LeetCode interview questions. 13 problems appear only in Cognizant's list and 112 appear only in Yandex's list.
What topics overlap most between Cognizant and Yandex?
The most common shared topics between Cognizant and Yandex are Array (8 shared questions), Two Pointers (4 shared questions), String (4 shared questions), Math (3 shared questions), Hash Table (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or Yandex?
Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. Yandex has 51 Easy, 67 Medium, and 10 Hard questions. Yandex has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cognizant and Yandex?
Start with the 16 shared problems since they cover what both companies ask most often. Then add 13 Cognizant-specific and 20 Yandex-specific questions to round out your prep.