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."
Demonstrate leadership and team development
Demonstrate leadership and team development Behavioral & Leadership: End-to-End Project Leadership (L5-level) Context: This is a behavioral prompt oft...
Design a scalable Instagram-like platform
Design a scalable Instagram-like platform Design: Instagram-like Photo/Video Sharing Platform (Technical Screen) Context Design a photo/video sharing ...
Optimize algorithms and validate inputs
Optimize algorithms and validate inputs For a typical medium-difficulty coding task, walk through your approach: enumerate edge cases, justify your in...
Answer senior-level behavioral questions
Answer senior-level behavioral questions Behavioral & Leadership (Machine Learning Engineer — Onsite) Context: Prepare three concise STAR stories (Sit...
Describe a high-stakes project you owned
Describe a high-stakes project you owned Behavioral: End-to-End Ownership Under Ambiguity You are interviewing for a Machine Learning Engineer role. U...
Describe pair-programming challenge under time pressure
Describe pair-programming challenge under time pressure Behavioral: Pair Programming Under Ambiguity and Unfamiliar Tools Context: For a Software Engi...
Design a global notification service
Design a global notification service System Design: Globally Distributed Notification Service Context You are designing a multi-tenant notification pl...
Design a Random Number Generation API
Design a Random Number Generation API System Design: Random Number Service (REST + Streaming) You are designing a high-scale service that generates ra...
Explain Train-Test Performance Gap
This question evaluates a candidate's competency in diagnosing model generalization failures for both classical machine learning and deep learning sys...
Evaluate ETA Impact on Conversion
You are a Senior Data Scientist at a ride-hailing company such as Uber. ETA refers to the estimated pickup time shown to a rider before they decide wh...
Design overload protection with load shedding
Design overload protection with load shedding Design: Maintain p99 Latency SLOs During Sudden Traffic Spikes Context You are designing a user-facing, ...
Explain Kafka architecture and reliability semantics
Explain Kafka architecture and reliability semantics Kafka Architecture and End-to-End Semantics You are asked to explain Kafka's core architecture an...
Describe conflict resolution, prioritization, and collaboration
Describe conflict resolution, prioritization, and collaboration Behavioral Prompt: Conflict Resolution and Leadership (Software Engineer, Onsite) Inst...
Design a Dropbox-like file storage and sync service
Design a Dropbox-like file storage and sync service Design a cloud file storage and synchronization service like Dropbox / Google Drive. The system sh...
Optimize attention for long sequences
Optimize attention for long sequences System Design: Efficient Attention for Long Sequences Context You are designing or optimizing sequence models th...
Find kth missing integer and redundant operations
You are given two independent coding tasks. Task 1: K-th missing number You are given an integer array nums (not necessarily sorted) containing distin...
Simulate a Turn-Based Two-Player Game
This question evaluates API design, state management, move validation, board representation, and correctness guarantees for a turn-based game simulato...
Design an experiment for exploratory recommendations
Experiment Design for Exploratory Recommendations You are launching an online A/B test for a new recommendation algorithm. The goal is to increase use...
Posterior probability given model accuracy
Security Classification: Posterior Probability When Flagged You are evaluating a binary classifier that flags potentially bad users. Assume: - Base ra...
Comparing two ad‑insertion strategies
Comparing Two Ad Insertion Methods You are designing an ad insertion system. In a short time bucket or session, there are n eligible content slots whe...