Machine Learning Engineer + Data Scientist + Software 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."
Design and train a PPO pipeline
End-to-End PPO Training: Describe Your Pipeline You are asked to explain, in concrete and reproducible terms, how you trained a policy with Proximal P...
Explain PPO and Transformer basics
PPO, Bellman Equations, On-/Off-Policy Learning, and Transformer Basics Context: You are interviewing for a machine learning role with emphasis on rei...
Debug and Fix Failing Unit Tests in Java
You receive a small Java project for a credit-card rewards service with three failing unit tests: calculatesTriplePointsForRestaurants, returnsUnknown...
Explain motivations, resume, and logistics
HR Screen: Behavioral Overview for a Machine Learning Engineer Context: You are preparing for an HR screen for a Machine Learning Engineer role. The r...
Explain Go concurrency and database choices
Go Concurrency, Cross-Language Comparison, Database Trade-offs, and Storage Design Part A — Concurrency in Go 1. Explain synchronous vs asynchronous e...
Summarize background, challenge project, and failure
Behavioral & Leadership Screen — Software Engineer (Hiring Manager Round) This is a hiring-manager technical screen. After a brief warm-up, the interv...
Design cron scheduler and reward/review system
System Design: Company-Wide Scheduler Platform and Employee Review & Rewards System You are designing two platforms for a fast-growing, multi-tenant t...
Design tables from metrics
Data Modeling Design Task: Short‑Video Social App Analytics You are designing an analytics data model for a short‑video social application. The app su...
Design cloud storage with quotas and compression
System Design: Multi‑Tenant Cloud Storage Service (Take‑Home) You are tasked with designing a multi‑tenant cloud storage service that supports file up...
Design a nested-list iterator
You are given a nested structure that can contain integers or further lists. Design an iterator over this structure that returns integers in left-to-r...
Describe initiative, project, analysis, and relationship-building
Behavioral and Leadership Questions — Data Scientist Technical Screen Context You are interviewing for a Data Scientist role and will be asked to demo...
Design nearby place recommendations
Real‑Time Nearby Places Recommendation System Context Design a mobile feature that recommends nearby places (e.g., restaurants, shops, attractions) to...
Describe current work and relocation willingness
Behavioral Screen: Responsibilities, Project Deep Dive, and Relocation You are interviewing for a Software Engineer role in a behavioral/leadership HR...
Design and scale a Yelp-like platform
System Design: Yelp-like Local-Business Reviews Platform + URL Shortener You are designing two systems: 1) A Yelp-like local-business reviews platform...
Implement an expiring GPU-credit manager
Implement an expiring GPU-credit manager for a cloud provider. Each user receives credit grants with an amount and an expiration timestamp. Support: (...
Design a profiling plan for kernels
Rigorous Profiling and Experimentation Plan for a Kernel Simulator You are given only a kernel simulator that reports cycle counts and microarchitectu...
Explain OS and networking basics
Systems Fundamentals Quickfire (Onsite Software Engineer) Answer concisely but precisely. Use diagrams or bullets if it helps. 1) Processes, Threads, ...
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...
Design anomaly detection and response platform
Design an AI-Driven OS Snapshot Anomaly Detection Service Context You are designing a cloud service that ingests operating system (OS) snapshots from ...
Explain optimization and tensor vs pipeline parallelism
Task: Deep Learning Optimization and Parallelism You are asked to explain optimization techniques commonly used to improve deep learning training and ...