Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.8k
Companies
511
Updated
08.16.2026
9.8k Questions 511 Companies08.16.2026
PLTCHK
"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"
_The_TaNk_
"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"
ChrisSenior SWE, LinkedIn
"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."
sleepy33
"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."
JakeSenior ML Engineer, Lyft
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
nuggetlord
"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."
CarlosFull Stack, Shopify
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
boba.tea.vibes
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
AndySWE-II, Google
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
couchpotato99
"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."
ShrutiData Engineer, Salesforce
"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."
midnightramen
"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."
BiancaFrontend Eng, Figma
"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."
tambrahm007
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
toa
"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."
Showing 20 results
Role
Medium
Software Engineer LockedDesign a One-on-One Chat Service
This question evaluates the ability to design a scalable, real-time one-on-one messaging service, probing distributed systems concepts, data modeling,...
System Design
210
1
1417 people solved
May 31, 2026
Medium
Data ScientistDefine Success for a New Group Feature Without Hiding Cannibalization
Prompt A travel-oriented social app is considering a new Groups feature that lets people who do not already know one another form communities around d...
Analytics & Experimentation
12
0
99 people solved
Jul 6, 2026
Hard
Software EngineerDesign Container Assignment with Incompatible Goods
Design Container Assignment with Incompatible Goods Design a service that assigns goods in a shipment to ocean containers while respecting capacity an...
System Design
3
0
33 people solved
Jun 28, 2026
Hard
Software EngineerSenior+Design a Bookstore Pricing API with Batch Fetches
Design a Bookstore Pricing API with Batch Fetches In a high-level system-design discussion, design the HTTP interface and supporting service for fetch...
System Design
5
0
39 people solved
May 10, 2026
Medium
Software EngineerImplement 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...
Software Engineering Fundamentals
7
0
138 people solved
Jul 2, 2026
Medium
Machine Learning EngineerReview a Compact GPT-Style Transformer Implementation
Review a Compact GPT-Style Transformer Implementation You are reviewing a compact decoder-only Transformer implementation intended for next-token lang...
Machine Learning
3
0
41 people solved
Jul 8, 2026
Medium
Software EngineerDesign Storage for a Flexible Metrics Monitoring System
Design Persistence for a Metrics Monitoring System Design the persistence layer for a metrics monitoring system so that it can support different query...
System Design
0
0
6 people solved
Jul 26, 2026
Hard
Data ScientistDebug Oscillating GPU Utilization During Training
A distributed neural-network training job shows GPU utilization repeatedly swinging from about 90% down to 20%. Explain how you would diagnose the thr...
ML System Design
0
0
6 people solved
Jul 26, 2026
Easy
Software EngineerDesign an LLM API pipeline
You are asked to build a small application feature that calls a hosted large language model (LLM) API to solve a user task. The interviewer is not int...
ML System Design
82
0
1002 people solved
Mar 17, 2026
Medium
Machine Learning EngineerDescribe a Failure or Mistake and Its Lasting Lesson
Describe a Failure or Mistake and Its Lasting Lesson Tell me about a meaningful professional failure or mistake. What did you own, how did you respond...
Behavioral & Leadership
3
0
44 people solved
Jul 2, 2026
Medium
Software EngineerReason About a Movie Billboard Rotation Component
Reason About a Movie Billboard Rotation Component An interview exercise concerns a movie billboard rotation component. The retained description says n...
Software Engineering Fundamentals
1
0
18 people solved
Jun 24, 2026
Hard
Data ScientistDesign an A/B test with causal inference
A/B Test Design: Checkout Nudge (Guest-Level Randomization) You own experimentation for an e-commerce checkout flow. You're launching a checkout nudge...
Analytics & Experimentation
89
1
1454 people solved
Oct 13, 2025
Hard
Data ScientistChoose the right test for proportions
A/B Test on Delivery Completion Rate (Binary Outcome) Context: You are evaluating an A/B test on a binary metric (delivered_bool). Treat each order as...
Statistics & Math
42
0
358 people solved
Oct 13, 2025
Hard
Software EngineerAnalyze an Unfair-Coin Bankroll Game
A player starts with a bankroll of 10. Each round, a biased coin is heads with probability 0.6 and tails with probability 0.4. On heads the bankroll i...
Statistics & Math
3
0
31 people solved
May 24, 2026
Hard
Software EngineerSenior+Review and Improve a Flawed Design Document
Review and Improve a Flawed Design Document You are given a design document for a system that has important omissions or unsafe assumptions. Review it...
System Design
4
0
91 people solved
Apr 16, 2026
Medium
Software Engineer LockedDesign a Security Monitoring Framework
This question evaluates a candidate's understanding of designing security monitoring frameworks for cloud infrastructure, covering competencies in sys...
System Design
132
0
993 people solved
May 26, 2026
Medium
Software EngineerDebug Round-Robin and Consistent-Hash Routing
Debug Round-Robin and Consistent-Hash Routing You are given two load-balancer implementations that produce incorrect routing: one uses round robin and...
Software Engineering Fundamentals
0
0
4 people solved
Aug 2, 2026
Medium
Software EngineerDesign a Small-Scale URL Shortener with Collision Handling
Design a Small-Scale URL Shortener with Collision Handling Design the simplest small-scale abstraction that converts a long URL into a short code and ...
System Design
0
0
4 people solved
Aug 2, 2026
Medium
Software EngineerSenior+Explain Team Impact and Executive Collaboration
Explain Team Impact and Executive Collaboration Discuss how you created positive impact beyond your own assigned tasks and how you worked with senior ...
Behavioral & Leadership
6
0
46 people solved
Jul 13, 2026
Medium
Software EngineerSenior+Explain Your Most Meaningful Project Contribution
Explain Your Most Meaningful Project Contribution Tell the interviewer about a project you are most proud of. Explain why it mattered, what you person...
Behavioral & Leadership
0
0
3 people solved
Aug 6, 2026