Snapchat Machine Learning Engineer Interview Questions
Practice the exact questions companies are asking right now.
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Explain core ML fundamentals and tradeoffs
ML Fundamentals Interview Prompt Answer the following ML fundamentals questions clearly and with practical examples: 1. Bias vs. variance - What ar...
Design a short-video recommender for short-term interest
Scenario You are designing a short-video recommendation system (similar to a swipe/feed product). The system must personalize the feed for each user a...
Describe an innovation you drove end-to-end
Behavioral Question: Innovation Many teams value “innovation,” meaning you can generate and deliver novel, high-impact ideas. Prompt: - Tell me about ...
Design a harmful content detection system
System Design: End-to-End Harmful Content Detection (Multilingual, Multimodal) Context You are designing a safety system for a large, mobile-first, ep...
Design real-time top-K POI retrieval on maps
Real-Time Top-K POIs in Viewport: System Design Context Design a real-time system for a mobile map that continuously shows the top-K points of interes...
Determine and print expression to reach target
You are given four numbers and a target T (e.g., 24). Using +, −, ×, ÷ and parentheses, and using each number exactly once, determine whether you can ...
Explain core ML concepts and design choices
ML Fundamentals — Interview Questions Instructions Answer the following five ML fundamentals questions. Use precise definitions, equations, and concis...
Compare convolutions and transformers
Compare CNNs and Transformers Task Explain the key differences between convolutional neural networks (CNNs) and transformer architectures. Specificall...
Find nearest room; extend to two users
You are given an m×n grid where 1 is a wall (impassable), 0 is an empty cell, and 2 is a meeting room. From a starting coordinate [r, c], you may move...
Describe a challenging project you led
Behavioral Prompt: A Challenging Project You Led or Contributed To Context: Technical screen for a Machine Learning Engineer role. The interviewer ask...
Count decodings of a numeric string
Given a string s of digits representing an encoded message where '1' maps to 'A', ..., '26' maps to 'Z', and '0' cannot appear alone (it must be part ...
Design a video recommendation system
Scenario Design an end-to-end video recommendation system for a short-video or spotlight-style feed. Requirements 1. Product goals - Personalized r...
Find all quadruplets summing to target
Problem Given an integer array nums (length n) and an integer target, return all unique quadruplets [a,b,c,d] such that: - a + b + c + d == target - T...
Model an ads ranking system
Scenario You are designing the modeling approach for an ads ranking system in a feed/search product. Requirements - For each ad impression opportunity...
Design a search-to-ads ranking pipeline
Prompt Design a high-level search + ads ranking system for an app where a user issues a query and the product shows a mix of organic search results an...
Explain BatchNorm, optimizers, and L1/L2
Prompt Answer the following ML fundamentals questions: 1. Batch Normalization (BatchNorm): - What trainable parameters does BatchNorm have? - Wh...
Design an ads ranking ML system
Prompt You are designing an ads ranking system for a large consumer app (feed/search entry point). For each request, the system receives a user contex...