Apple

Data Engineer Interview Experience - Sunnyvale, California

September 1, 2025

Neutral ExperienceNo Offer

Process

Two phone screens that contained behavior questions, past projects, Python, and SQL. Python was LeetCode medium. I was asked a question about BFS. SQL was also LeetCode medium and involved some joins.

Questions

Difference between MapReduce and Spark

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Interview Statistics

The following metrics were computed from 4 interview experiences for the Apple Data Engineer role in Sunnyvale, California.

Success Rate

50%

Pass Rate

Apple's interview process for their Data Engineer roles in Sunnyvale, California is fairly selective, failing a large portion of engineers who go through it.

Experience Rating

Positive50%

Neutral50%

Negative0%

Candidates reported having very good feelings for Apple's Data Engineer interview process in Sunnyvale, California.

Apple Interview Questions

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 ListsDynamic Programming

Best Time to Buy and Sell Stock

Easy

You're given daily stock prices. Find the maximum profit you can make by buying and selling the stock once. You must buy before you sell.

ArraysDynamic ProgrammingGreedy Algorithms

Top K Frequent Elements

Medium

Find the k most frequent elements in a given array of numbers. Return the top k elements based on their frequency.

ArraysStacks