Palo Alto Networks

Principal Engineer Interview Experience - Palo Alto, California

July 1, 2022

Negative ExperienceNo Response

Process

It was a lengthy process with difficult questions. The first few stages were a bit disorganized.

The questions I received were difficult. However, upon starting, the coworkers I had clearly didn't get the same interview and didn't understand fundamental CS concepts.

I was asked very multi-process-related questions.

Questions

Do a presentation on a previous architecture.

Interview Statistics

The following metrics were computed from 1 interview experience for the Palo Alto Networks Principal Engineer role in Palo Alto, California.

Success Rate

100%

Pass Rate

Palo Alto Networks's interview process for their Principal Engineer roles in Palo Alto, California is incredibly easy as the vast majority of engineers get an offer after going through it.

Experience Rating

Positive0%

Neutral0%

Negative100%

Candidates reported having very negative feelings for Palo Alto Networks's Principal Engineer interview process in Palo Alto, California.

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