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."
Answer Behavioral Questions About Deadlines, Feedback, and Ambiguity
Prepare behavioral answers about tight deadlines, critical feedback, ambiguous requirements, and AI-related work experience. `hint Hint 1 Start by sta...
Teach a New Technical Concept to an Undergraduate
Teach a New Technical Concept to an Undergraduate Imagine the interviewer is an undergraduate who has completed an introductory programming course but...
Parse a CSV and Generate a Gift Exchange
Parse a CSV and Generate a Gift Exchange Implement a small gift-exchange service. The input is CSV text with headers name,email. Parse valid participa...
Resolve Package Dependencies with Cycle Detection
Implement buildOrder(dependencies, target), which returns the packages needed to build and install target in a valid dependency-first order. dependenc...
Repair and Extend a Transaction Reward Processor
Repair and Extend a Transaction Reward Processor An existing layered web service has failing unit tests. Its transaction-processing path must read a t...
Build the Largest Allowed Number Below a Limit
Build the Largest Allowed Number Below a Limit Problem Implement largestAllowedBelow(limit, digits) -> result. limit is a positive decimal integer rep...
Design a Configurable Reward Points Service
Design a Configurable Reward Points Service Design a reward-points service that reads transactions, calculates and stores rewards, and supports busine...
Implement K-Means Without Numerical Libraries
Implement K-Means Without Numerical Libraries Implement K-means clustering for a list of finite numeric points using only core language features and e...
Improve classifier with noisy multi-annotator labels
Problem You are given a text dataset for a binary classification task (label in $\{0,1\\}$). Each example has been labeled by multiple human annotator...
Discuss Ethical Judgment and Unwanted Work
This behavioral interview question evaluates self-awareness, ethical judgment, and the ability to influence peers without relying on authority — core ...
Find the Most Frequent IP Addresses in a File Too Large for Memory
Design an exact, bounded-memory method for finding the most frequent IP addresses in a file far larger than RAM. Analyze memory and disk-I/O trade-off...
Design a Venue Rental and Booking System (HLD)
Design a venue / facility rental system that lets organizers — schools, clubs, and event organizers — discover and rent out physical venues. Venues ar...
Design a resilient bootstrap API
Design a Resilient Bootstrap API When a client app loads, it needs to fetch everything required to render the first screen in a single call. That data...
Count Matrix Cells Whose Row and Column Neighbors Match
Given a matrix, count how many cells have the property that every other value in the same row and every other value in the same column are all equal t...
Build a Small Agent or RAG Tool with the Mistral API
In a live coding interview, you receive an API token for an LLM backend and are asked to build a small agent or retrieval-augmented generation tool. D...
Design A Drive-Style Usage Quota Limiter
Practice a cloud storage system design question about enforcing drive-style usage quotas during uploads, deletes, retries, and concurrent operations. ...
Design a Scalable File Upload and Content Extraction Pipeline
Design an asynchronous file-upload and content-extraction system for a language-model workflow, including APIs, storage, queues, workers, retries, and...
Present a Technically Challenging Project
Prepare a concise engineering project review that can withstand a detailed technical deep dive. Frame the problem, constraints, architecture, personal...
Design a Played-By Summary System
This system design question evaluates a candidate's ability to decompose a personalized social-proof feature into distinct distributed systems problem...
Count Complete Highway Journeys from Toll Logs
Count Complete Highway Journeys from Toll Logs Each toll record is (timestamp, plate, location, booth_type). booth_type is ENTRY, MAINROAD, or EXIT. T...