Apple Machine Learning Engineer Interview Questions
Practice the exact questions companies are asking right now.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Implement Masked Multi-Head Self-Attention
Implement the core self-attention module used inside a Transformer encoder. Given an input tensor X of shape (batch_size, sequence_length, d_model), f...
Wrap Matching Substrings in Bold Tags
During a machine learning engineer phone screen, the coding task was: You are given a string text and a list of strings patterns. Return a new string ...
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...
Optimize image filters on device
You are shipping an image-filter feature that must run entirely on a mobile device. Users expect preview latency below 30 ms on common phones, memory ...
Implement permutations and image retrieval
The coding portion included several short exercises for a vision-focused ML role: 1. Given an array of distinct integers, return all possible permutat...
Analyze vision model failures
For a computer vision product, discuss the following: 1. Explain the core machine learning fundamentals that matter most in vision work, including bia...
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...
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...
How do you prioritize and influence?
In a behavioral interview for an AI/ML engineering role, be prepared to answer questions like the following: 1. How do you prioritize multiple project...
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...
Compare audio preprocessing and training
Suppose you are building an audio model for a voice assistant. Compare common audio data preprocessing approaches and explain their trade-offs. For ex...
Design a grounded voice assistant
You are designing a voice assistant response system similar to Siri. The assistant uses a large language model together with external tools or APIs to...
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...
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...
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...
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...
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...