Arista Networks vs Cognizant Interview Questions
Arista Networks lists 39 LeetCode interview questions while Cognizant lists 29. They share 4 problems — 10% of Arista Networks's bank and 14% of Cognizant's. Focus on the overlap first, then drill into 35 Arista Networks-only and 25 Cognizant-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 4 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Arista Networks and Cognizant.
Step 2 — Company-specific depth: Add Arista Networks-specific problems like Construct String With Repeat Limit, Find the Town Judge, Reverse Nodes in k-Group and Cognizant-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Cognizant skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
4 Shared Questions
High-priority problems to practice for both Arista Networks and Cognizant.
| Problem | Difficulty |
|---|---|
| Longest Palindromic Substring | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Maximum Subarray | Medium |
| Merge Two Sorted Lists | Easy |
Unique to Arista Networks (35)
Problems in Arista Networks's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| Construct String With Repeat Limit | Medium |
| Find the Town Judge | Easy |
| Reverse Nodes in k-Group | Hard |
| Restore IP Addresses | Medium |
| Reorder List | Medium |
| Course Schedule II | Medium |
| Reverse Linked List II | Medium |
| Remove Linked List Elements | Easy |
| Contains Duplicate II | Easy |
| Inorder Successor in BST II | Medium |
| Maximum Depth of Binary Tree | Easy |
| Copy List with Random Pointer | Medium |
Unique to Cognizant (25)
Problems in Cognizant's list that do not appear at Arista Networks.
Frequently Asked Questions
How many LeetCode questions do Arista Networks and Cognizant share?
Arista Networks and Cognizant share 4 LeetCode interview questions. 35 problems appear only in Arista Networks's list and 25 appear only in Cognizant's list.
What topics overlap most between Arista Networks and Cognizant?
The most common shared topics between Arista Networks and Cognizant are String (2 shared questions), Dynamic Programming (2 shared questions), Two Pointers (1 shared questions), Hash Table (1 shared questions), Sliding Window (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Arista Networks or Cognizant?
Arista Networks has 12 Easy, 26 Medium, and 1 Hard questions. Cognizant has 18 Easy, 10 Medium, and 1 Hard questions. Cognizant has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Arista Networks and Cognizant?
Start with the 4 shared problems since they cover what both companies ask most often. Then add 20 Arista Networks-specific and 20 Cognizant-specific questions to round out your prep.