Palo Alto Networks

Senior Software Engineer Interview Experience - United States

April 22, 2025

Positive ExperienceNo Offer

Process

The interview process for me involved the following steps:

Initial phone screening of your resume with a recruiter.
Interview with the Director or Senior Director.
Interview with a panel.
An offer, if one was extended.

It was a pretty slow process, taking about four months all-in.

Questions

What do you do after making a mistake?

Interview Statistics

The following metrics were computed from 12 interview experiences for the Palo Alto Networks Senior Software Engineer role in United States.

Success Rate

Pass Rate

Palo Alto Networks's interview process for their Senior Software Engineer roles in the United States is extremely selective, failing the vast majority of engineers.

Experience Rating

Positive33%

Neutral8%

Negative58%

Candidates reported having very negative feelings for Palo Alto Networks's Senior Software Engineer interview process in United States.

Palo Alto Networks Interview Questions

Longest Common Prefix

Easy

Find the longest string that is a prefix of all strings in a given array. If no common prefix exists, return an empty string.

ArraysStrings

LRU Cache

Medium

Design a data structure that acts as a Least Recently Used (LRU) cache. Implement methods to get and put key-value pairs, evicting the least recently used entry when the cache is full.

Linked ListsArraysDynamic Programming

Find the Longest Equal Subarray

Medium

Given an array and a maximum allowed difference, find the longest subarray where the most frequent element appears at least the same number of times as all other elements combined. You can change elements by at most the allowed difference amount to achieve this.

ArraysTwo PointersSliding Windows