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."
Generate Function Profiling Events from Stack Samples
Generate Function Profiling Events from Stack Samples You receive timestamped call-stack samples in increasing timestamp order. Each sample is (timest...
Design Inventory Availability and Order Placement
Design Inventory Availability and Order Placement Design the inventory portion of an e-commerce system with two core operations: 1. Query the currentl...
Present a Relevant Data Science Project to a Hiring Manager
Choose one data-science project that is relevant to the role and walk a hiring manager through it. Explain the problem, your role, the analytical appr...
Compare Quicksort and Mergesort in Practice
Compare Quicksort and Mergesort in Practice Compare Quicksort and Mergesort as choices for sorting a large collection. Explain their mechanics, comple...
Answer Backend Behavioral Questions with Follow-up Depth
Prepare a structured Google behavioral interview answer for answer backend behavioral questions with follow-up depth. The prompt helps candidates fram...
Design a Food Rating System
This question evaluates skills in system design, data modeling, consistency and transactional guarantees, idempotency, scaling, and designing read-hea...
Find the Earliest Anagram Window
Find the Earliest Anagram Window Problem Implement firstAnagramStart(text, pattern) -> index. Return the zero-based start index of the earliest contig...
Interpret Model Metrics, Regularization, and Resampling Fundamentals
Interpret Model Metrics, Regularization, and Resampling Fundamentals A screening discussion covers an imbalanced classifier with a 3 percent base rate...
Explain a Project Through Business Impact and User Value
Explain a Project Through Business Impact and User Value Prompt Describe a project from your current or recent work. Explain the problem, your contrib...
Explain ranking cold-start strategies
This question evaluates an engineer's competency in handling cold-start for users and items, constructing and applying content-based embeddings, organ...
Debug MiniGPT and Backpropagate Matmul
This is a hands-on PyTorch screen with two independent tasks. You share a code editor with the interviewer and are expected to run the code, read trac...
Design a Distributed Cron Job Scheduler
Design a distributed cron scheduler that creates recurring runs, dispatches work, tracks attempts, and recovers from crashes and partitions. Address d...
Design an Inventory Management System
Design an Inventory Management System Design a system that tracks products and stock across one or more locations, supports receipts, reservations, re...
Design a Fair GPU Training Job Platform
Design a Fair GPU Training Job Platform Design a platform where machine-learning engineers submit one-off GPU training jobs. The platform must allocat...
Discuss a Complex Project, Motivation, Strengths, and Sustainable Work
Discuss a Complex Project, Motivation, Strengths, and Sustainable Work Answer the following behavioral questions with concrete, supportable examples. ...
Design a single-node persistent in-memory cache
Scenario Design a single-machine in-memory cache used by a web service to serve concurrent read and write requests. This is a deliberately low-level s...
Use find, ps, top, and kill Safely on Linux
Use find, ps, top, and kill Safely on Linux You are diagnosing a Linux host where an application is consuming unexpected resources and may need to be ...
Model Flights, Passengers, Bookings, and Seat Holds
Design a relational data model for a flight-booking service that must support these operations efficiently: - Book a passenger on a flight. - Retrieve...
Scale Duplicate File Detection
This question evaluates system-design, performance-diagnosis, and distributed-systems competencies, focusing on identifying bottlenecks through measur...
Restore an Array with One Displaced Element
Restore an Array with One Displaced Element An integer array was originally sorted in nondecreasing order. It was then changed by removing at most one...