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
Hard
Software Engineer LockedDesign a URL shortening service
This question evaluates systems design skills including scalable architecture, data modeling, low-latency routing, availability, and operational conce...
System Design
7
0
109 people solved
Feb 11, 2026
Medium
Software EngineerBuild a Banking System with Activity Rankings
Build a Banking System with Activity Rankings Problem Implement an in-memory banking system that processes these operations: - CREATE_ACCOUNT account_...
Coding & Algorithms
2
0
20 people solved
Jul 4, 2026
Medium
Software EngineerFind the Nearest Target Character and Support Streaming Updates
Given an array of characters and a target character, return the distance from each index to the nearest target occurrence, or -1 if the target never a...
Coding & Algorithms
0
0
13 people solved
Jul 4, 2026
Hard
Software EngineerExplain your perspective on AI safety
You are working in a company that builds and deploys advanced AI systems (e.g., large language models, recommendation systems, vision models) that are...
Behavioral & Leadership
69
0
491 people solved
Dec 8, 2025
Medium
Machine Learning Engineer LockedExplain GRPO-style training for diffusion models
This question evaluates understanding of reinforcement learning applied to diffusion-based generative models, covering policy optimization, reward mod...
Machine Learning
10
0
117 people solved
Dec 8, 2025
Hard
Data Scientist LockedDesign an Unbiased Upgrade Experiment
This question evaluates understanding of causal inference, experiment design, and metric selection in product analytics, including defining causal est...
Analytics & Experimentation
19
0
136 people solved
Dec 29, 2025
Medium
Software EngineerBuild an OAuth-based data migration client
Prompt Build a small command-line program that migrates records from a legacy HTTP API to a new HTTP API. Required steps 1. Obtain an access token usi...
Software Engineering Fundamentals
49
0
504 people solved
Oct 31, 2025
Medium
Software EngineerDetect robot state after movements
Detect robot state after movements Implement an algorithm to determine whether a robot following a given set of movement instructions ends in a valid ...
Coding & Algorithms
12
0
195 people solved
Aug 4, 2025
Medium
Software EngineerImplement custom iterator classes
Implement custom iterator classes In a blank coding environment (no IDE assistance, no autocomplete), implement an iterator abstraction entirely from ...
Coding & Algorithms
26
0
195 people solved
Aug 4, 2025
Medium
Software EngineerIntroduce yourself and justify quant research fit
Behavioral Prompt: Self-Intro, Motivation, and High-Stakes Decision You are interviewing for a Software Engineer role in a quantitative trading resear...
Behavioral & Leadership
30
0
217 people solved
Aug 12, 2025
Medium
Data Scientist LockedSolve Dice Probability and Matrix Questions
This question evaluates probability reasoning for modular distributions of sums of independent dice and linear algebra competency regarding matrices w...
Machine Learning
2
0
27 people solved
May 28, 2026
Medium
Software Engineer LockedSolve String Arrays and Row Deduplication
This multi-part question evaluates array and string manipulation skills, deduplication logic and pairwise character comparison, as well as the ability...
Coding & Algorithms
2
0
31 people solved
May 28, 2026
Hard
Software EngineerDesign a multi-tenant CI/CD platform
Question Design a multi-tenant CI/CD system that runs pipelines triggered by Git activity, isolates tenants from one another, and scales to thousands ...
System Design
18
0
333 people solved
Sep 6, 2025
Hard
Software Engineer AIDesign an Automated Ticket Investigation Agent
Design an AI-enabled agentic system that automatically investigates support or engineering tickets. The system should: - Read an incoming ticket and u...
ML System Design
8
0
75 people solved
Apr 27, 2026
Medium
Software EngineerImplement core puzzle/array/grid routines
You may be asked to solve one or more of the following coding exercises (write clean, testable code; discuss time/space complexity): 1) Jigsaw assembl...
Coding & Algorithms
45
0
374 people solved
Jan 7, 2026
Easy
Software EngineerLargest Subset With Positive Bitwise AND
Problem Implement largest_positive_and_subset(nums). Choose a nonempty subset of the given nonnegative integers. The subset is valid when the bitwise ...
Coding & Algorithms
0
0
15 people solved
Jun 14, 2026
Hard
Machine Learning EngineerImplement Naive Bayes classifier from scratch
Implement a Naive Bayes classifier from scratch (you may use NumPy). Write a class with: - fit(X, y): estimate class priors and feature likelihood par...
Machine Learning
6
0
102 people solved
Feb 9, 2026
Medium
Software EngineerAnswer general fit and AI safety questions
Answer general fit and AI safety questions Behavioral and AI-Safety Interview Prompts (Software Engineer, Onsite) Context You are interviewing for a S...
Behavioral & Leadership
35
0
277 people solved
Aug 1, 2025
Easy
Software EngineerDesign an alert notification system
Design a multi-tenant alert notification system for operational incidents. Monitoring sources send events when checks fire or recover. Users can confi...
System Design
22
0
312 people solved
Jan 28, 2026
Medium
Software Engineer LockedDesign a Hosted Notebook Platform
This question evaluates system design skills around stateful compute orchestration, including control-plane versus data-plane separation, workspace li...
System Design
294
0
3158 people solved
Apr 12, 2026