Cognizant vs Palo Alto Networks Interview Questions
Cognizant lists 29 LeetCode interview questions while Palo Alto Networks lists 46. They share 9 problems — 31% of Cognizant's bank and 20% of Palo Alto Networks's. Focus on the overlap first, then drill into 20 Cognizant-only and 37 Palo Alto Networks-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 9 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cognizant and Palo Alto Networks.
Step 2 — Company-specific depth: Add Cognizant-specific problems like Palindrome Number, Count Subarrays of Length Three With a Condition, Smallest Value of the Rearranged Number 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
9 Shared Questions
High-priority problems to practice for both Cognizant and Palo Alto Networks.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Palindromic Substring | Medium |
| Longest Common Prefix | Easy |
| Valid Parentheses | Easy |
| Median of Two Sorted Arrays | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Merge Sorted Array | Easy |
| Merge Two Sorted Lists | Easy |
| Add Two Numbers | Medium |
Unique to Cognizant (20)
Problems in Cognizant's list that do not appear at Palo Alto Networks.
| Problem | Difficulty |
|---|---|
| Palindrome Number | Easy |
| Count Subarrays of Length Three With a Condition | Easy |
| Smallest Value of the Rearranged Number | Medium |
| Fibonacci Number | Easy |
| Valid Anagram | Easy |
| Second Highest Salary | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Managers with at Least 5 Direct Reports | Medium |
| Maximum Subarray | Medium |
| Reverse Integer | Medium |
| Product Sales Analysis I | Easy |
| Count Primes | Medium |
Unique to Palo Alto Networks (37)
Problems in Palo Alto Networks's list that do not appear at Cognizant.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Find the Longest Equal Subarray | Medium |
| Logger Rate Limiter | Easy |
| String Compression | Medium |
| Design HashMap | Easy |
| Search in Rotated Sorted Array | Medium |
| Group Anagrams | Medium |
| Decode String | Medium |
| Minimum Number of Food Buckets to Feed the Hamsters | Medium |
| Min Stack | Medium |
| Binary Tree Level Order Traversal | Medium |
| Merge Intervals | Medium |
Frequently Asked Questions
How many LeetCode questions do Cognizant and Palo Alto Networks share?
Cognizant and Palo Alto Networks share 9 LeetCode interview questions. 20 problems appear only in Cognizant's list and 37 appear only in Palo Alto Networks's list.
What topics overlap most between Cognizant and Palo Alto Networks?
The most common shared topics between Cognizant and Palo Alto Networks are String (4 shared questions), Array (3 shared questions), Hash Table (2 shared questions), Two Pointers (2 shared questions), Linked List (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cognizant or Palo Alto Networks?
Cognizant has 18 Easy, 10 Medium, and 1 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 Cognizant and Palo Alto Networks?
Start with the 9 shared problems since they cover what both companies ask most often. Then add 20 Cognizant-specific and 20 Palo Alto Networks-specific questions to round out your prep.