DoorDash vs ServiceNow Interview Questions
DoorDash lists 78 LeetCode interview questions while ServiceNow lists 71. They share 15 problems — 19% of DoorDash's bank and 21% of ServiceNow's. Focus on the overlap first, then drill into 63 DoorDash-only and 56 ServiceNow-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 15 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and ServiceNow.
Step 2 — Company-specific depth: Add DoorDash-specific problems like Walls and Gates, Longest Increasing Path in a Matrix, Binary Tree Maximum Path Sum and ServiceNow-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: DoorDash skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
15 Shared Questions
High-priority problems to practice for both DoorDash and ServiceNow.
| Problem | Difficulty |
|---|---|
| Next Permutation | Medium |
| Two Sum | Easy |
| Longest Common Subsequence | Medium |
| Asteroid Collision | Medium |
| Sliding Window Maximum | Hard |
| Number of Islands | Medium |
| LRU Cache | Medium |
| 4Sum | Medium |
| Merge Intervals | Medium |
| Jump Game II | Medium |
| Number of Visible People in a Queue | Hard |
| LFU Cache | Hard |
| Group Anagrams | Medium |
| Longest Palindromic Substring | Medium |
| Rotting Oranges | Medium |
Unique to DoorDash (63)
Problems in DoorDash's list that do not appear at ServiceNow.
Unique to ServiceNow (56)
Problems in ServiceNow's list that do not appear at DoorDash.
Frequently Asked Questions
How many LeetCode questions do DoorDash and ServiceNow share?
DoorDash and ServiceNow share 15 LeetCode interview questions. 63 problems appear only in DoorDash's list and 56 appear only in ServiceNow's list.
What topics overlap most between DoorDash and ServiceNow?
The most common shared topics between DoorDash and ServiceNow are Array (11 shared questions), Hash Table (4 shared questions), Two Pointers (3 shared questions), String (3 shared questions), Dynamic Programming (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or ServiceNow?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. ServiceNow has 7 Easy, 51 Medium, and 13 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and ServiceNow?
Start with the 15 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 20 ServiceNow-specific questions to round out your prep.