Apple Machine Learning Engineer Interview Questions
Practice the exact questions companies are asking right now.
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Debug a PyTorch U-Net shape mismatch
You are given a PyTorch implementation of a U-Net-like segmentation model that should follow the original U-Net style with valid convolutions (no padd...
Explain dataset size, generalization, and U-Net skips
You are interviewing for an ML Engineer role in an image/video team. Answer the following conceptual questions clearly and concisely. 1) Small vs. lar...
Compare DCN v1 vs v2 and A/B test
Part A — DCN variants You are building a CTR/CVR prediction model for a recommender/ads system using a Deep & Cross Network (DCN). 1. Explain the key ...
Write a generator for substring pattern matches
Problem Write a generator that scans a string and emits a value whenever a substring matches a given pattern. Input - A string s - A string pattern (n...
Design a news feed ranking system
Design a personalized news feed recommendation system. Requirements: - Low latency serving (real-time feed generation). - Personalization using user b...
Design a multimodal RAG assistant
Prompt Design a Retrieval-Augmented Generation (RAG) system that can answer user questions using an internal knowledge base containing multiple modali...
Implement TF-IDF scoring for documents
Problem Implement a simplified TF–IDF scorer. You are given: - A list of documents docs, where each document is a string. - A query string q. Tokeniza...
How do you align ambiguous cross-functional projects?
This hiring-manager interview was a 45-minute behavioral discussion centered on past project work and communication skills. A candidate should be prep...
Design a CPA system for ad bidding
You are designing an ads bidding/optimization system where advertisers care about CPA (cost per acquisition). Describe how you would design a system t...
Implement bag-of-words similarity search from scratch
Implement a bag-of-words–based text similarity search engine from scratch. Write code that: ( 1) tokenizes text (lowercasing, punctuation handling, Un...
Explain annotation agreement and LLM vs human judges
Annotation Agreement Rate: Definition, Measurement, Limitations, and LLM-as-Judge Practices Context In labeling datasets and evaluating models, we oft...
Design an ML keyword recommendation pipeline
ML System Design: Typed Search Keyword Recommendations for an App Marketplace Goal Design an end-to-end ML pipeline that, given a user query (e.g., "g...
Design a streaming embedding-based classifier
You are given a continuously arriving stream of text data for a classification task. Design an end-to-end machine learning system that: 1. processes r...
Solve stock and banana problems
Solve both coding problems below. 1. Maximum single-transaction stock profit: Given an array prices where prices[i] is the stock price on day i, retur...
Describe recent project experiences
Behavioral: Walk Through Two Recent ML Projects Context: Technical screen for a Machine Learning Engineer. Focus on technical depth, measurable busine...
Explain classification lifecycle and CTR modeling
You are interviewing for a Machine Learning Engineer role. Discuss the following machine-learning topics in a structured way: 1. Describe one practica...
Design App Store search
Design the search system for a mobile app marketplace similar to an app store. Users enter short queries such as 'photo editor', 'budget tracker', or ...
Design Apple News without ML
Design an initial search and content-discovery system for a news application similar to Apple News, assuming you do not have a trained ranking model y...