Apple Software Engineer Interview Questions
Apple Software Engineer interview questions reflect the company’s dual insistence on engineering rigor and product sensibility. Expect interviews that evaluate data structures and algorithms, system design, and production-quality coding alongside behavioral conversations about collaboration, ownership, and product trade-offs. What’s distinctive about Apple is the emphasis on craftsmanship and edge-case thinking: interviewers often probe for clarity of thought, concise code, and domain knowledge tied to the product area (iOS, macOS, systems, or services). Be ready for a recruiter screen, one or more technical coding interviews, a system-design discussion, and behavioral rounds that dig into past projects and impact. For effective interview preparation, prioritize writing correct, readable code under time pressure, practicing design conversations that balance performance and simplicity, and structuring behavioral stories with clear outcomes. Rehearse explaining trade-offs and failure modes, and tailor examples to the product context you’re targeting. Mock interviews that simulate CoderPad-style coding and whiteboard design rounds will help you demonstrate the communication and technical depth Apple looks for during team match and final debriefs.
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Solve linked list, grid BFS, and median queries
You are given three separate algorithmic tasks. 1) Reorder a linked list by odd/even positions Given the head of a singly linked list, reorder the nod...
Design ad click aggregator and file sync service
You have two system design prompts. 1) Design an ads click aggregation system Design a service that ingests ad click events at very high QPS and suppo...
Merge overlapping time intervals
Problem: Merge Intervals You are given an array of intervals intervals, where each interval is a pair [start, end] with start <= end. Merge all overla...
Implement flood fill using BFS and DFS
Problem You are given a 2D grid image of size m × n, where each cell contains an integer color value. You are also given a starting cell (sr, sc) and ...
Explain key React concepts and error handling
Frontend/React Fundamentals Questions Answer the following React and frontend engineering questions: 1. What is a Virtual DOM? 2. How does the Virtual...
Explain Runnable vs Callable and thread-safe Singleton
Concurrency & Design Patterns (Java) 1. In Java concurrency, what is the difference between Runnable and Callable? - When would you choose one over...
Implement a debounce function
Problem: Implement debounce(fn, wait) Implement a debounce utility function. Behavior Given a function fn and a delay wait (milliseconds), debounce(fn...
Describe common RTL lint warnings and errors
You are writing RTL (e.g., Verilog/SystemVerilog) and run a lint tool on your code. The tool reports items such as: - "Treat as black box" - Combinati...
Solve three easy algorithm problems
You are given three independent algorithmic tasks. For each one, explain your approach (no need to run code). 1) Merge two sorted lists (integers inst...
Zero out duplicates and sort an array
Coding question You are given an integer array arr of length about 75. - The data is not sorted. - The array may contain duplicate values. - You must ...
Compute conflicts and minimum meeting rooms
You are given a list of meeting room booking requests. Each request is a half-open time interval [start, end), meaning it uses the room starting at st...
Implement rotation, LRU cache, streaming median, cycle detection
Complete the following coding tasks. For each, provide code, justify time/space complexity, and describe edge cases: 1) Image rotation: Given an n×n i...
Improve chip performance without process advances
Assume you are working on a digital chip, but the semiconductor process node and basic device technology are fixed: there is no new, faster process an...
Solve interval, grid-fill, and heap tasks
You are asked to solve the following algorithmic problems. Problem 1: Concurrent users from online intervals You are given n inclusive time intervals ...
Explain your LLM project and contributions
Prior Experience Deep Dive (LLM) You mentioned you previously worked on an LLM-related research/project. Explain: - What problem you were trying to so...
Refactor rock–paper–scissors for config and ties
Refactor an existing Rock–Paper–Scissors tournament with three robot players so that the number of rounds is configurable and the system also tracks t...
Design video platform and catalog system
System Design: Two Independent Systems You are asked to design two large-scale systems. For each system, provide: - Scope and key requirements - Exter...
Implement multi-head self-attention correctly
Implement Multi-Head Self-Attention (from scratch) Context You are given an input tensor X with shape (batch_size, seq_len, d_model). Implement a mult...
Explain use cases for clock synchronizers
Assume you are designing a digital system with multiple clock domains. The clocks have different frequencies and unknown phase relationships. You can ...
Implement deep clone for complex objects
Implement a deep-clone function for nested objects in JavaScript (or a language of your choice) without using JSON serialization or third-party librar...