Apple

Consumer electronics, software, and services leader known for secrecy and quality.

5 Rounds ~30 Days Very Hard

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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

All Roles Cloud Engineer 1 Data Engineer 2 Data Scientist 3 Machine Learning Engineer 4 ML Engineer 3 Software Engineer 6

All Topics Algorithms 6 System Design 4 Culture Fit 2 Concurrency 1 Memory Management 1 Leadership 1

Software Engineer • Coding • medium

Implement an LRU (Least Recently Used) Cache. Imagine we are using this to cache album artwork in the Apple Music app to minimize network requests.

#Data Structures #Hash Map #Doubly Linked List

Software Engineer • Coding • hard

Given a string of server logs and a string of target error codes, find the minimum window substring in the logs that contains all the error codes. This is used for rapid crash analysis in Xcode.

#Sliding Window #Hash Table #Strings

Software Engineer • Coding • medium

You are given a 2D grid representing a map of land and water. Write a function to count the number of islands. Imagine this is a sub-routine for rendering custom geographic clusters in Apple Maps.

#Graph #DFS #BFS

Software Engineer • Coding • hard

Design an algorithm to serialize and deserialize a binary tree. This concept is similar to how we might freeze and restore the state of a complex UI view hierarchy.

#Trees #String Manipulation #DFS/BFS

Software Engineer • Coding • medium

Given an array of meeting time intervals, merge all overlapping intervals. We use similar logic in the Calendar app to determine a user's free/busy availability.

#Arrays #Sorting

Software Engineer • Coding • easy

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. This is useful for parsing configuration files.

#Stacks #Strings

Difficulty Radar

Based on recent AI-sourced data.

Meet Your Interviewers

The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

Unwritten Rules

Think Out Loud

Always explain your thought process before writing code or drawing architecture.