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 a top-build target tracker
This question evaluates object-oriented design and data-structure skills, focusing on time-windowed aggregation, top-k query computation, tie-breaking...
How would you explain PCA and SHAP?
Question You are interviewing for a Data Scientist role at Point72, a systematic / quantitative investment firm. The interviewer asks you to pick one ...
Determine departure time from travel times
Canoe and River Current Timing Context Two friends paddle on a river with a constant current of 2 mph. Their paddling speed relative to the water is c...
Explain GPU pipeline and execution hazards
Explain the following GPU architecture topics: 1. How a modern GPU renders a triangle from input vertices to final pixels. 2. How register read-after-...
Design a Conversational AI Assistant
This question evaluates system design, distributed systems, and real-time inference-serving competencies for building large-scale conversational AI pr...
Render Overlapping Rectangles on an ASCII Canvas
Render Overlapping Rectangles on an ASCII Canvas Implement render_canvas(width, height, rectangles). The canvas initially contains spaces and is retur...
Implement concurrent structures and debug queue code
The coding rounds covered several implementation and debugging tasks: 1. Implement an LRU cache that supports get(key) and put(key, value) in constant...
How to forecast bike dock demand
This question evaluates competency in time-series forecasting and demand prediction, including feature engineering, model selection and evaluation, ha...
Minimum Moves on a Grid with k-Cell Jumps
You are given an m x n grid. Each cell is either open or blocked: - grid[i][j] = 0 means the cell is open. - grid[i][j] = 1 means the cell is blocked....
Design Distributed Cloud Job Scheduling
This question evaluates proficiency in distributed systems design, resource scheduling and placement, stateful job orchestration, API and data-model d...
Design a multimodal RAG assistant
Prompt Design a Retrieval-Augmented Generation (RAG) system that can answer user questions using an internal knowledge base containing multiple modali...
Validate virtual credit card transactions from encoded IDs
You are designing logic for a virtual credit card product. Part 1: Product reasoning Explain key benefits and drawbacks of virtual credit cards for: -...
Answer core behavioral questions using STAR
Prepare structured answers (use STAR: Situation, Task, Action, Result) for the following common behavioral prompts: 1. Most proud project: Describe a ...
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...
Merge Three Sorted Arrays Without Duplicates
Merge Three Sorted Arrays Without Duplicates You are given three integer arrays sorted in nondecreasing order. Merge them into one sorted array that c...
Defend a Project's Schema, Indexes, and Concurrency Model
Defend a Project's Schema, Indexes, and Concurrency Model Choose one data-heavy service you have built and defend its data model under a detailed tech...
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...
Lead a deep dive on your most complex project
Past project deep dive (Staff/L6) Pick the most complex system you’ve worked on and be prepared for a 30–45 minute deep dive. Expect probing questions...
Design an unsafe content detection system
This question evaluates a candidate's competency in end-to-end machine learning system design for unsafe user-generated content detection, covering mu...
Explain your career and flagship project
Walk through your background from university to your current role. For each major transition, explain why you made that choice, what challenge you fac...