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 projects and handle AI-safety conflicts
Behavioral / Hiring Manager round 1. Walk through 1–2 key projects from your resume. - What was the goal and why did it matter? - What was your ...
Analyze the Accident-Rate Spike
A monthly line chart shows the accident rate for Uber trips in one city. The accident rate increases sharply from June through November, then drops qu...
Route HTTP requests to pods in a cluster
In a Docker/Kubernetes-like container cluster running multiple replicas (pods) of a service, explain how an incoming HTTP request reaches a specific p...
What are processes vs threads?
Question Explain the difference between multiprocessing and multithreading in the context of building concurrent applications. Cover the following: - ...
Design automated regression tests for an API
This question evaluates proficiency in designing automated regression test suites for RESTful APIs, performance verification and monitoring, end-to-en...
How would you model stock price prediction?
This question evaluates competency in applying machine learning to financial time-series, covering target definition, data selection, feature engineer...
Compute org height and minimal CEO promotions
You are given an organization chart with n employees labeled 1..n. Employee 1 is the CEO (root). The reporting relationships are given as two integer ...
Model an ads ranking system
This question evaluates machine learning modeling, feature engineering, and systems-level ranking competencies for ad selection and monetization, cove...
Find k customers with least revenue
Problem You are given a list of purchase events. Each event contains: - customer_id (string or int) - amount (integer, may be 0; assume non-negative u...
Parse logs and generate NFT attributes
This question evaluates parsing and log-processing skills alongside combinatorics and weighted-sampling competency, covering extraction and time-based...
Design a device owner lookup service
This question evaluates a candidate's understanding of system design concepts such as real-time event ingestion, handling out-of-order and duplicate e...
Implement text wrapping, waitlist, and intervals
This question evaluates skills in string parsing and word-wrapping logic, data-structure design for FIFO queue management and deletions, and interval ...
Compute decayed power levels in a graph
This question evaluates knowledge of graph algorithms and distance-based propagation, testing concepts such as shortest-path distance computation, mul...
Optimize a dispatcher’s scheduling data structures
Algorithmic analysis / code review: Dispatcher for memory-constrained scheduling You are given a single-threaded in-memory dispatcher that reacts to t...
Answer project and leadership behavioral questions
Behavioral Questions (project + leadership) Prepare structured answers for the following prompts: 1. Proudest project: Describe a project you’re most ...
Design an online marketplace for buying and selling
System Design: Online Marketplace Backend Context Design the backend for a two-sided online marketplace where sellers list items and buyers purchase t...
Design a generic key-value store
Design a Generic, Type-Safe Key-Value Store API Context You're asked to design a reusable key-value store with a generic, user-friendly API. The store...
Explain transformer architecture and variants
Technical Screen: Explain the Transformer Architecture Scope Provide a structured deep-dive into Transformers. Your explanation should cover theory, s...
Design key management service
Design a Key Management Service (KMS) You are asked to design a production-grade, multi-tenant Key Management Service. A client provides a key identif...
Design under vague distributed requirements
System Design Prompt: Distributed Metadata Catalog and Schema Registry Context Design a multi-tenant distributed Metadata Catalog and Schema Registry ...