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."
Explain gap and project contributions
Behavioral/Technical Screen: Recent Work and Project Deep-Dive Context You are in a technical screen for a Software Engineer role. The interviewer wan...
Implement a multi-step form in React
Build a Multi‑Step Form Component in React Context You are implementing a multi‑step web form in React. The form gathers user data over several steps ...
Design multi-core service startup scheduler
Service Startup Scheduler on a Host with M CPU Cores Context You are given a directed acyclic graph (DAG) of services where an edge u → v means servic...
Design a retail trading platform
Design a Retail Stock Trading Platform (Robinhood-like) Design a mobile-first retail stock trading platform for U.S. equities, similar to Robinhood. T...
Design signals across power and clock domains
Question In a SoC with two power domains A and B, design the interface for a control signal signal_1 (a registered 1-bit control such as an enable/sta...
Implement a nested object validator
Implement a helper function validate(object, required_style) that checks whether a possibly nested object matches a provided schema. The object may co...
Design Internal Chat and Re-engagement Emails
Design an internal chat system for an event marketplace company. Requirements: - Employees can send and receive one-to-one messages in real time. - Cl...
Design an ads data model
This question evaluates a candidate's ability to design scalable data models and system architecture for an ads platform, including entity relationshi...
Whiteboard and Deep Dive a Past Project
System Design: End-to-End Architecture Walkthrough Prompt Whiteboard the end-to-end architecture of a complex, user-facing system you led. Cover: 1. M...
Describe career goals and what makes good teams
For a Senior Data Scientist onsite (Uber context), answer the following leadership/behavioral prompts: 1) Describe a past project where you influenced...
Design Apple News without ML
Design an initial search and content-discovery system for a news application similar to Apple News, assuming you do not have a trained ranking model y...
Define and compare smart pointers
What is a smart pointer? How do smart pointers manage ownership and lifetimes compared with raw pointers? Describe common types (unique, shared, weak)...
Reduce frontend network requests efficiently
Reduce Redundant Frontend Requests for Availability and Pricing Context You are designing the web client and APIs for a bookings marketplace that disp...
Trace first pass of heap sort
Given the integer array [7, 6, 3, 5, 4, 1, 2], you apply heap sort to sort it in ascending order using a max-heap implementation. After building the i...
Estimate VRAM and compare model parallelism
This question evaluates understanding of GPU memory budgeting for large matrix multiplications and the comparative trade-offs between pipeline and ten...
Count Ordered Sequences That Sum to a Target
Count Ordered Sequences That Sum to a Target Given a positive target n and a set of unique positive order sizes, count the distinct ordered sequences ...
Generate Data Labeling Schedules
A data labeling platform manages tasks, AI models, and human annotators. Each entity has a 1-indexed string ID. You are given four integers: totalTask...
Design image and multimodal generation systems
System Design: Image Generation and Multimodal Generation Part 1 — End-to-End Image Generation System Design an end-to-end image generation system. Co...
Design a crash-resilient file system
Prompt Design a resilient file system that can recover file contents correctly after a system crash (e.g., power loss / kernel panic). The interviewer...
Explain Amdahl’s law and GPU matmul optimization
This question evaluates understanding of systems and performance fundamentals including parallel speedup (Amdahl’s law), GPU memory hierarchy and thre...