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 Calendar Event CRUD with Unit Tests
Design and implement a small calendar application that supports creating, editing, and deleting events. The interviewer expects unit tests and clean s...
Find Monthly Top Customers Excluding High-Frequency Users
Find Monthly Top Customers Excluding High-Frequency Users Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables. ...
Describe Something New You Learned Recently
Describe Something New You Learned Recently Describe one meaningful thing you learned during the last six months. Explain why you chose it, how you le...
Match Tagged Problems to Skilled Programmers at Scale
Model tagged problems and skilled programmers as a bipartite matching problem, then extend the design to distributed and streaming workloads. The exer...
Process a Mutable Stock-Price Log
Process a Mutable Stock-Price Log Build a small stock-price log and process a sequence of queries and updates. `python def process_stock_log( init...
Design a sandboxed cloud IDE
System Design: Sandboxed Cloud IDE (Colab-like) Design a multi-tenant, browser-based cloud IDE/notebook that lets users run code inside an isolated sa...
Find Clients Outside Provider Coverage
Problem Implement outside_coverage(providers, clients, max_distance). Each provider has an id, a list of specialties, and a two-dimensional location =...
Sort One Hundred Million Digits
Sort One Hundred Million Digits You must sort an unsorted collection of 100,000,000 integer digits, each in the range 0 through 9. Describe an algorit...
Defend a Redis Choice and Explain Database Index Trade-offs
Defend a Redis Choice and Explain Database Index Trade-offs During a project deep dive, an interviewer asks why your system used Redis and whether the...
Prove an Incremental Shuffle Is Uniform
Prove an Incremental Shuffle Is Uniform Consider this in-place shuffle for an array of length n: `text for i from 0 through n - 1: j = a uniformly...
Design a Human Workflow Distribution System
Design a workflow system that distributes tasks to human workers and tracks progress until completion. The system should assign work, prevent duplicat...
Design a Low-Latency Hotel Room Availability System
Design a hotel room availability service for a travel marketplace similar to Expedia. The key requirement is low-latency availability reads. Users sho...
Determine Whether One Person Can Attend Every Meeting
Determine Whether One Person Can Attend Every Meeting Problem Implement canAttendAllMeetings(intervals) -> canAttend. Each meeting is a half-open inte...
Discuss Motivation, Feedback, and Technical Disagreement
Discuss Motivation, Feedback, and Technical Disagreement Prepare concise, evidence-based responses to the following behavioral areas. Use real experie...
Describe Work Beyond Your Formal Responsibilities
Describe Work Beyond Your Formal Responsibilities Tell me about a time you took on useful work outside the normal boundaries of your role. Why did the...
Design a CI/CD Task Scheduler
Design a CI/CD Task Scheduler Design the scheduling core of a continuous-integration and continuous-delivery system. A pipeline is a directed acyclic ...
Describe How You Use SQL in Data Science Work
How do you use SQL in your day-to-day data-science work? Describe the kinds of problems you solve, the complexity of queries you can own, and the chec...
Explain Core ML Interview Concepts
You are in a phone screen for an applied scientist / machine-learning engineer role and are asked to verbally explain a set of machine-learning fundam...
Implement Spreadsheet Cells with Dependencies
Design spreadsheet-like get and set operations for cells where formulas can depend on other cells. When a cell changes, dependent cells should reflect...
Design a Tier-Aware AI Video Generation Service
Design a Tier-Aware AI Video Generation Service Prompt Design a service that accepts a generation request, runs an expensive video-generation workflow...