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."
How do you lead and drive impact?
You are interviewing for a senior or tech-lead data scientist role. Prepare to answer the following behavioral prompts with concrete examples from you...
Design LLM search handling long token inputs
Design an LLM-powered search and question-answering system over a large corpus of documents such as internal wikis, PDFs, logs, contracts, and web pag...
Build Friend Recommendations
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Design a Column-Queryable KV Database
This question evaluates understanding of distributed storage architectures, secondary indexing and queryability for sparse, column-oriented key-value ...
Design and implement an LRU cache
This question evaluates knowledge of data structures, algorithmic design, API design, and memory/resource management required to implement an efficien...
Review a PR for thread-safe request handling
This question evaluates understanding of thread-safety and concurrent programming, safe object and API design (immutability versus shared mutable stat...
Simulate bubble elimination and maximize common prefix
You are given two independent coding tasks (as in a multi-question OA). Solve each. Task A — Grid “bubble/candy” elimination simulation You are given ...
Design an End-to-End ML System
Design an End-to-End ML System System Design: Real-Time Recommendation ML System Context You are tasked with designing an end-to-end machine-learning ...
Verify Machine-Learning Fundamentals for E-commerce Recommendation Platform
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Design Real-Time Fraud Detection with XGBoost Model
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Explain Your Motivation for Career Transition and Role Interest
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Derive Probability of Even Sum in Bernoulli Trials
Derive Probability of Even Sum in Bernoulli Trials Probability Puzzles: Parity and Runs Context You are given two independent probability problems com...
Train GradientBoostingClassifier with 5-Fold Cross-Validation
Train GradientBoostingClassifier with 5-Fold Cross-Validation Final Model Training: GradientBoostingClassifier with 5-Fold CV Context Assume the noteb...
Forecast and Analyze DoorDash Menu Price Inflation Gap
Forecast and Analyze DoorDash Menu Price Inflation Gap DoorDash wants to understand and forecast the difference between on-platform menu prices and th...
Evaluate Account-Partner Onboarding with Success Metrics
Evaluate Account-Partner Onboarding with Success Metrics Scenario DoorDash's account-partner team acquires new merchants onto the marketplace, and lea...
Evaluate and Experiment with Harmful Content Detection Model
Evaluate and Experiment with Harmful Content Detection Model Evaluating a Harmful-Content Detection Model: Offline and Online Context You are given a ...
Design A/B Test for New Amazon Recommendation Module
Design A/B Test for New Amazon Recommendation Module A/B Test Design: Home Page Recommendation Module Scenario Amazon plans to introduce a new product...
Assess Amazon Leadership Principles in Behavioral Interviews
Assess Amazon Leadership Principles in Behavioral Interviews Scenario Amazon Data Scientist (often L5) onsite — the Leadership Principles (LP) behavio...
Master Behavioral Interview Questions for Data/ML Roles
Master Behavioral Interview Questions for Data/ML Roles Behavioral & Leadership Interview (Data Scientist Onsite) Context You are preparing for an ons...
Maximize Distinct Values with Cross-Array Swaps
Maximize Distinct Values with Cross-Array Swaps Given arrays a and b of equal length and an integer k, perform at most k swaps. Each swap chooses one ...