IBM vs Palo Alto Networks Interview Questions
IBM lists 115 LeetCode interview questions while Palo Alto Networks lists 46. They share 14 problems — 12% of IBM's bank and 30% of Palo Alto Networks's. Focus on the overlap first, then drill into 101 IBM-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 IBM and Palo Alto Networks.
Step 2 — Company-specific depth: Add IBM-specific problems like Find the Smallest Divisor Given a Threshold, Gray Code, 3Sum and Palo Alto Networks-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Palo Alto Networks 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 IBM and Palo Alto Networks.
| Problem | Difficulty |
|---|---|
| Integer to Roman | Medium |
| Two Sum | Easy |
| Merge Intervals | Medium |
| Longest Substring Without Repeating Characters | Medium |
| String Compression | Medium |
| Longest Common Prefix | Easy |
| Valid Parentheses | Easy |
| Longest Palindromic Substring | Medium |
| Merge Sorted Array | Easy |
| Group Anagrams | Medium |
| Subarray Sum Equals K | Medium |
| Median of Two Sorted Arrays | Hard |
| Word Break | Medium |
| LRU Cache | Medium |
Unique to IBM (101)
Problems in IBM's list that do not appear at Palo Alto Networks.
| Problem | Difficulty |
|---|---|
| Find the Smallest Divisor Given a Threshold | Medium |
| Gray Code | Medium |
| 3Sum | Medium |
| Exclusive Time of Functions | Medium |
| Minimum Operations to Make Columns Strictly Increasing | Easy |
| Fizz Buzz | Easy |
| Roman to Integer | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Count Ways to Group Overlapping Ranges | Medium |
| Meeting Rooms II | Medium |
| Rotate Image | Medium |
| Minimum Absolute Difference | Easy |
Unique to Palo Alto Networks (32)
Problems in Palo Alto Networks's list that do not appear at IBM.
| Problem | Difficulty |
|---|---|
| Find the Longest Equal Subarray | Medium |
| Logger Rate Limiter | Easy |
| Add Two Numbers | 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 |
| Insert Delete GetRandom O(1) | Medium |
| Restore IP Addresses | Medium |
| Top K Frequent Words | Medium |
Frequently Asked Questions
How many LeetCode questions do IBM and Palo Alto Networks share?
IBM and Palo Alto Networks share 14 LeetCode interview questions. 101 problems appear only in IBM's list and 32 appear only in Palo Alto Networks's list.
What topics overlap most between IBM and Palo Alto Networks?
The most common shared topics between IBM and Palo Alto Networks are String (8 shared questions), Hash Table (7 shared questions), Array (7 shared questions), Sorting (3 shared questions), Two Pointers (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: IBM or Palo Alto Networks?
IBM has 33 Easy, 73 Medium, and 9 Hard questions. Palo Alto Networks has 12 Easy, 29 Medium, and 5 Hard questions. Palo Alto Networks has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both IBM and Palo Alto Networks?
Start with the 14 shared problems since they cover what both companies ask most often. Then add 20 IBM-specific and 20 Palo Alto Networks-specific questions to round out your prep.