Palo Alto Networks vs Visa Interview Questions
Palo Alto Networks lists 46 LeetCode interview questions while Visa lists 146. They share 19 problems — 41% of Palo Alto Networks's bank and 13% of Visa's. Focus on the overlap first, then drill into 27 Palo Alto Networks-only and 127 Visa-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 19 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Palo Alto Networks and Visa.
Step 2 — Company-specific depth: Add Palo Alto Networks-specific problems like Find the Longest Equal Subarray, Logger Rate Limiter, String Compression and Visa-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Visa skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
19 Shared Questions
High-priority problems to practice for both Palo Alto Networks and Visa.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Search in Rotated Sorted Array | Medium |
| Group Anagrams | Medium |
| Binary Tree Level Order Traversal | Medium |
| Merge Intervals | Medium |
| Merge Sorted Array | Easy |
| Median of Two Sorted Arrays | Hard |
| Restore IP Addresses | Medium |
| Longest Common Prefix | Easy |
| Subarray Sum Equals K | Medium |
| Diameter of Binary Tree | Easy |
| Two Sum | Easy |
| Merge Two Sorted Lists | Easy |
| Sliding Window Maximum | Hard |
| Word Break | Medium |
| Valid Parentheses | Easy |
| Reconstruct Itinerary | Hard |
| Longest Palindromic Substring | Medium |
Unique to Palo Alto Networks (27)
Problems in Palo Alto Networks's list that do not appear at Visa.
| Problem | Difficulty |
|---|---|
| Find the Longest Equal Subarray | Medium |
| Logger Rate Limiter | Easy |
| String Compression | Medium |
| Add Two Numbers | Medium |
| Design HashMap | Easy |
| Decode String | Medium |
| Minimum Number of Food Buckets to Feed the Hamsters | Medium |
| Min Stack | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Top K Frequent Words | Medium |
| Integer to Roman | Medium |
| Linked List Cycle | Easy |
Unique to Visa (127)
Problems in Visa's list that do not appear at Palo Alto Networks.
Frequently Asked Questions
How many LeetCode questions do Palo Alto Networks and Visa share?
Palo Alto Networks and Visa share 19 LeetCode interview questions. 27 problems appear only in Palo Alto Networks's list and 127 appear only in Visa's list.
What topics overlap most between Palo Alto Networks and Visa?
The most common shared topics between Palo Alto Networks and Visa are Array (11 shared questions), String (8 shared questions), Hash Table (6 shared questions), Sorting (4 shared questions), Linked List (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Palo Alto Networks or Visa?
Palo Alto Networks has 12 Easy, 29 Medium, and 5 Hard questions. Visa has 32 Easy, 92 Medium, and 22 Hard questions. Visa has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Palo Alto Networks and Visa?
Start with the 19 shared problems since they cover what both companies ask most often. Then add 20 Palo Alto Networks-specific and 20 Visa-specific questions to round out your prep.