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 Online Chess Matchmaking
This question evaluates a candidate's ability to design scalable, low-latency matchmaking backend systems, covering distributed service decomposition,...
Design out-of-order windowed stream processor
Design out-of-order windowed stream processor Design an event processor for an unbounded, infinite stream of events. Each event has the fields id, tim...
Improve Trust in a RAG System
You own an enterprise retrieval-augmented generation system used for high-stakes document question answering, such as mortgage underwriting, legal rev...
Design a Cloud File Storage Service
This question evaluates a candidate's ability to design scalable, secure distributed file storage systems, covering competencies in file and folder hi...
Find top-K frequent elements in a stream
You receive a large stream of items (e.g., integers or strings) that may not fit in memory. Design an algorithm that can return the top K most frequen...
How Would You Test Whether Momentum Is a Real Alpha Signal in Stocks?
In a quantitative-research data-analysis round, you are asked a methodology question. No coding is required — the interviewer wants you to reason like...
Design Telehealth Consultation Queue
Design a web-based queuing application for a health-insurance company that offers free 24/7 telehealth access to its members through a website and mob...
Design a swipeable video feed backend
Design the backend service for a short-video product similar to a “Spotlight”-style feed. Scope: only the backend “feed vending” functionality that po...
Design a Production ML Serving System
This question evaluates a candidate's competency in operating and scaling ML-powered production systems, focusing on scaling, reliability and fault to...
Design an HR Document AI Platform
Design an internal AI platform for a bank's HR organization. The platform should ingest HR documents such as policies, benefits guides, onboarding man...
Explain SystemVerilog verification concepts and write constraints
Answer the following SystemVerilog / DV questions. Use short explanations and, where appropriate, show small SV code snippets. 1) Concurrency: Explain...
Explain metrics, regularization, and ablation studies
You are interviewing for an Applied Scientist role. 1) For a binary classification problem, explain the following and when you would use each: - Preci...
Return Elements Greater Than the Overall Average
Return Elements Greater Than the Overall Average Implement above_average(values). Compute the arithmetic mean of the entire non-empty integer list, th...
Implement Stable Softmax
This question evaluates understanding of numerical stability, floating-point arithmetic, normalization, and probability distributions when computing s...
Choose a Safe Polling Strategy for Delayed Records
Choose a Safe Polling Strategy for Delayed Records Data store A emits one record every 30 seconds. A is a black box. Each record eventually appears in...
Explain ML evaluation, sequence models, and optimizers
Scenario An interviewer is deep-diving into an ML project you built (you can assume it is a supervised model unless specified otherwise). They want yo...
Explain your VLM project end-to-end
You are asked to deep-dive (“resume grilling”) on a Vision-Language Model (VLM) project listed on your resume. Cover the following clearly and concret...
Predicting Stock Prices from Twitter Data
Predicting Stock Prices from Twitter Data Suppose you have access to a large stream of Twitter data — tweets with their text, timestamps, and author m...
Measure a Discovery Boost in a Two-Sided Marketplace
Design a measurement plan for a discovery change in a two-sided marketplace. The interview question evaluates metric selection, experiment design, int...
Turn a Marketplace Data Insight into an Actionable Product Plan
Practice turning a marketplace data observation into an interview-ready product and analytics plan. The question tests problem framing, stakeholder al...