Arista Networks vs ServiceNow Interview Questions
Arista Networks lists 39 LeetCode interview questions while ServiceNow lists 71. They share 7 problems — 18% of Arista Networks's bank and 10% of ServiceNow's. Focus on the overlap first, then drill into 32 Arista Networks-only and 64 ServiceNow-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 7 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Arista Networks and ServiceNow.
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 ServiceNow-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: ServiceNow skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
7 Shared Questions
High-priority problems to practice for both Arista Networks and ServiceNow.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Simplify Path | Medium |
| Longest Palindromic Substring | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Maximum Subarray | Medium |
| Top K Frequent Elements | Medium |
| Merge Two Sorted Lists | Easy |
Unique to Arista Networks (32)
Problems in Arista Networks's list that do not appear at ServiceNow.
| 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 ServiceNow (64)
Problems in ServiceNow's list that do not appear at Arista Networks.
Frequently Asked Questions
How many LeetCode questions do Arista Networks and ServiceNow share?
Arista Networks and ServiceNow share 7 LeetCode interview questions. 32 problems appear only in Arista Networks's list and 64 appear only in ServiceNow's list.
What topics overlap most between Arista Networks and ServiceNow?
The most common shared topics between Arista Networks and ServiceNow are Hash Table (3 shared questions), String (3 shared questions), Linked List (2 shared questions), Dynamic Programming (2 shared questions), Array (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Arista Networks or ServiceNow?
Arista Networks has 12 Easy, 26 Medium, and 1 Hard questions. ServiceNow has 7 Easy, 51 Medium, and 13 Hard questions. ServiceNow has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Arista Networks and ServiceNow?
Start with the 7 shared problems since they cover what both companies ask most often. Then add 20 Arista Networks-specific and 20 ServiceNow-specific questions to round out your prep.