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."
Handle Difficult Feedback and Manager Disagreement
Answer the following leadership questions with examples in which your choices materially affected the outcome. Do not reuse the same story unless the ...
Design GPU Scheduling for a Video Generation Platform
Prepare for a OpenAI system design interview about design gpu scheduling for a video generation platform. This question focuses on requirements, archi...
Implement a Simple Memory Allocator
Design and implement a simplified memory allocator exposing malloc(size) and free(ptr) over a single fixed-size heap (a contiguous byte array). The al...
Present a Technical Project to a Cross-Functional Audience
Present a Technical Project to a Cross-Functional Audience Prepare a 20-minute deep dive on a project you actually worked on, followed by technical di...
List Unallocated Experiment Buckets
List Unallocated Experiment Buckets Problem An experiment system divides traffic into numbered buckets. Implement findUnallocatedBuckets(bucketCount, ...
Rebalance Experiment Buckets with Minimal Reassignment
Rebalance Experiment Buckets with Minimal Reassignment Problem Implement rebalanceBuckets(bucketCount, groups, targetPercentages) -> rebalancedGroups....
Find the Longest Substring Without Repeated Characters
Find the Longest Substring Without Repeated Characters Problem Implement longestUniqueSubstringLength(text) -> length. Return the length of the longes...
Find the Longest Run of One Character
Find the Longest Run of One Character Problem Implement longestIdenticalRun(text) -> length. Return the maximum number of consecutive positions contai...
Reserving an Elevator for Food Deliveries
This question tests a data scientist's ability to design a rigorous A/B experiment for a real-world operational policy with competing stakeholder outc...
Design Extensible Interview Coding Systems
Review a broad software engineering interview loop covering object-oriented delivery APIs, rule engines, article voting systems, and a news aggregator...
Size an Opportunity and Present It with Clear Visuals
Structure a data science case that sizes a business opportunity from partial information and presents it to senior decision-makers. Build top-down and...
Design a Testable 2048 Game Engine
Design a Testable 2048 Game Engine Design the object model and core operations for a 2048 game. The engine must create a game, return the current boar...
Find a Horizontal Cut That Bisects Rectangle Area
Solve a computational-geometry problem that asks for the horizontal line dividing the combined area of many disjoint rectangles in half. The exercise ...
Design a Thread-Safe Multi-Rule Rate Limiter
Design and reason about a rate limiter that begins with one rule and evolves to support multiple rules, concurrent requests, handler failures, and def...
Reason About and Validate Virtual Card Transactions
Reason About and Validate Virtual Card Transactions A virtual-card transaction contains a 16-digit card_number, an 8-digit transaction_id, and an inte...
Object-Oriented Design: Hotel Room Booking System
Object-Oriented Design: Hotel Room Booking System Design the object model and core service for a hotel room booking system. The service must let a cli...
Circular Drone Hub Delivery Route
A drone delivery network is laid out as a ring of n hubs, numbered 0, 1, ..., n - 1. Each hub is connected by a direct air corridor to its two neighbo...
Design a Ride-Sharing System (Uber-style Core Platform)
Design a Ride-Sharing System (Uber-style Core Platform) Design the core backend of a ride-sharing platform like Uber. Riders open the app, see nearby ...
Search a Rotated Sorted Array in One Binary-Search Pass
Search a Rotated Sorted Array in One Binary-Search Pass Problem Implement searchRotated(values, target) -> index. values was formed by taking a strict...
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. ...