DoorDash vs Palo Alto Networks Interview Questions
DoorDash lists 78 LeetCode interview questions while Palo Alto Networks lists 46. They share 14 problems — 18% of DoorDash's bank and 30% of Palo Alto Networks's. Focus on the overlap first, then drill into 64 DoorDash-only and 32 Palo Alto Networks-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 14 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and Palo Alto Networks.
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 Palo Alto Networks-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
14 Shared Questions
High-priority problems to practice for both DoorDash and Palo Alto Networks.
| Problem | Difficulty |
|---|---|
| Maximum Profit in Job Scheduling | Hard |
| Koko Eating Bananas | Medium |
| Basic Calculator | Hard |
| Two Sum | Easy |
| Basic Calculator II | Medium |
| Sliding Window Maximum | Hard |
| LRU Cache | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Integer to Roman | Medium |
| Merge Intervals | Medium |
| Group Anagrams | Medium |
| Longest Palindromic Substring | Medium |
| Diameter of Binary Tree | Easy |
| Add Two Numbers | Medium |
Unique to DoorDash (64)
Problems in DoorDash's list that do not appear at Palo Alto Networks.
Unique to Palo Alto Networks (32)
Problems in Palo Alto Networks's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Find the Longest Equal Subarray | Medium |
| Logger Rate Limiter | Easy |
| String Compression | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Design HashMap | Easy |
| Search in Rotated Sorted Array | Medium |
| Decode String | Medium |
| Minimum Number of Food Buckets to Feed the Hamsters | Medium |
| Min Stack | Medium |
| Binary Tree Level Order Traversal | Medium |
| Merge Sorted Array | Easy |
| Median of Two Sorted Arrays | Hard |
Frequently Asked Questions
How many LeetCode questions do DoorDash and Palo Alto Networks share?
DoorDash and Palo Alto Networks share 14 LeetCode interview questions. 64 problems appear only in DoorDash's list and 32 appear only in Palo Alto Networks's list.
What topics overlap most between DoorDash and Palo Alto Networks?
The most common shared topics between DoorDash and Palo Alto Networks are Array (7 shared questions), Math (5 shared questions), String (5 shared questions), Hash Table (5 shared questions), Sorting (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or Palo Alto Networks?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. Palo Alto Networks has 12 Easy, 29 Medium, and 5 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and Palo Alto Networks?
Start with the 14 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 20 Palo Alto Networks-specific questions to round out your prep.