Arista Networks vs Cisco Interview Questions
Arista Networks lists 39 LeetCode interview questions while Cisco lists 87. They share 13 problems — 33% of Arista Networks's bank and 15% of Cisco's. Focus on the overlap first, then drill into 26 Arista Networks-only and 74 Cisco-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 13 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Arista Networks and Cisco.
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 Cisco-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Cisco skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
13 Shared Questions
High-priority problems to practice for both Arista Networks and Cisco.
| Problem | Difficulty |
|---|---|
| Restore IP Addresses | Medium |
| Missing Number | Easy |
| LRU Cache | Medium |
| Permutations | Medium |
| Palindromic Substrings | Medium |
| Longest Palindromic Substring | Medium |
| Word Search | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Maximum Subarray | Medium |
| Top K Frequent Elements | Medium |
| Edit Distance | Medium |
| Valid Palindrome | Easy |
| Decode String | Medium |
Unique to Arista Networks (26)
Problems in Arista Networks's list that do not appear at Cisco.
| Problem | Difficulty |
|---|---|
| Construct String With Repeat Limit | Medium |
| Find the Town Judge | Easy |
| Reverse Nodes in k-Group | Hard |
| 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 |
| Search in Rotated Sorted Array | Medium |
Unique to Cisco (74)
Problems in Cisco's list that do not appear at Arista Networks.
| Problem | Difficulty |
|---|---|
| House Robber | Medium |
| Predict the Winner | Medium |
| Lucky Numbers in a Matrix | Easy |
| Rotate Image | Medium |
| Spiral Matrix | Medium |
| Fizz Buzz | Easy |
| Snakes and Ladders | Medium |
| Number of Valid Words in a Sentence | Easy |
| Maximum Difference Between Increasing Elements | Easy |
| Merge Intervals | Medium |
| Find Third Transaction | Medium |
| Implement Router | Medium |
Frequently Asked Questions
How many LeetCode questions do Arista Networks and Cisco share?
Arista Networks and Cisco share 13 LeetCode interview questions. 26 problems appear only in Arista Networks's list and 74 appear only in Cisco's list.
What topics overlap most between Arista Networks and Cisco?
The most common shared topics between Arista Networks and Cisco are String (8 shared questions), Array (5 shared questions), Hash Table (4 shared questions), Dynamic Programming (4 shared questions), Backtracking (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Arista Networks or Cisco?
Arista Networks has 12 Easy, 26 Medium, and 1 Hard questions. Cisco has 24 Easy, 50 Medium, and 13 Hard questions. Cisco has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Arista Networks and Cisco?
Start with the 13 shared problems since they cover what both companies ask most often. Then add 20 Arista Networks-specific and 20 Cisco-specific questions to round out your prep.