Interview Questions
Practice the exact questions companies are asking right now.
Questions
10.0k
Companies
520
Updated
08.21.2026
10.0k Questions 520 Companies08.21.2026
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 EngineerBuild searchable list and highlight max transaction
UI Component: Filtered List With Max-Highlight Context Implement a small web UI component (e.g., in a modern frontend framework) that receives an arra...
Software Engineering Fundamentals
9
0
87 people solved
Sep 6, 2025
Hard
Software EngineerDesign a notification system
System Design: Multi-Channel Notification Platform Context Design a multi-tenant notification platform that delivers messages across email, SMS, and m...
System Design
31
0
256 people solved
Sep 6, 2025
Medium
Software EngineerSenior+Design and implement an Airbnb wallet
Design and Implement an Airbnb-Style Wallet (OOD + Runnable Code) You are asked to design and implement an in-app wallet system for a marketplace like...
System Design
22
0
404 people solved
Sep 6, 2025
Hard
Software EngineerSenior+Design review system with voting and rewards
Design a Scalable Product Review System with Voting and Rewards You are designing a reviews feature for a large e-commerce marketplace. Customers can ...
System Design
33
0
340 people solved
Sep 6, 2025
Medium
Software EngineerDebug wrong DOM attributes in unknown framework
Frontend Debugging Plan: Incorrect DOM Attributes in an Unfamiliar Framework Context You join a team using an unfamiliar frontend framework. In the br...
Software Engineering Fundamentals
7
0
122 people solved
Sep 6, 2025
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
Medium
Machine Learning EngineerSenior+ LockedHighest Average-Salary Team in an Org Chart
This question evaluates a candidate's ability to traverse tree-structured data and perform subtree aggregation, applying recursive or bottom-up DFS te...
Coding & Algorithms
0
0
6 people solved
Jun 14, 2026
Medium
Machine Learning EngineerSenior+ LockedMerge Overlapping Time Ranges
This question evaluates a candidate's ability to work with interval merging, a core array and sorting problem in technical interviews. It tests unders...
Coding & Algorithms
0
0
7 people solved
Jun 14, 2026
Hard
Software EngineerDebug a failing ML classifier
Debugging a Churn Prediction Pipeline With Poor Generalization Context You have inherited a binary churn prediction system. The goal is to predict whe...
Machine Learning
69
0
576 people solved
Jul 28, 2025
Medium
Data ScientistSenior+Compute P(A>B) for m- and n-sided dice
Two fair dice are rolled independently: - Die A has m faces labeled \(1,2,\dots,m\). - Die B has n faces labeled \(1,2,\dots,n\). Each face is equally...
Statistics & Math
7
0
110 people solved
Sep 19, 2025
Hard
Software EngineerDesign a crypto trading web frontend
Design the front-end architecture for a retail cryptocurrency trading web app (like a spot exchange). Assume the product needs these core screens and ...
System Design
14
0
201 people solved
Feb 23, 2026
Medium
Software EngineerDesign an ad content delivery system with A/B testing
Design an ad content delivery (ad serving) system that selects and serves ads to users, and supports A/B testing / experimentation. Core scenario A cl...
System Design
11
0
100 people solved
Nov 15, 2025
Hard
Data ScientistHow to Target Coupon Users
A ride-sharing company such as Lyft wants to launch a coupon campaign to increase commuter rides, but the coupon budget is limited. How would you anal...
Analytics & Experimentation
11
0
148 people solved
Dec 16, 2025
Medium
Backend EngineerCount Lucky Numbers in an Inclusive Range
Count Lucky Numbers in an Inclusive Range Problem A positive integer x is lucky when it is divisible by floor(sqrt(x)). Implement countLuckyNumbers(le...
Coding & Algorithms
0
0
4 people solved
Jul 15, 2026
Medium
Software EngineerNew GradCompute Edit Distance
Compute Edit Distance Given two strings, return the minimum number of single-character operations needed to transform the first string into the second...
Coding & Algorithms
41
1
346 people solved
Jul 15, 2026
Medium
Software EngineerDesign a Concurrent Car Reservation Service
Design a Concurrent Car Reservation Service Prompt Design a car reservation service. A customer searches for an available car for a location and time ...
System Design
2
0
29 people solved
Jan 18, 2026
Medium
Software EngineerDesign Flight Booking and Voting Systems
Answer both system design prompts. Part A: Flight Ticket Booking System Design the backend for a flight ticket booking product. The system should supp...
System Design
2
0
28 people solved
Apr 3, 2026
Hard
Machine Learning EngineerDesign a scalable video search system
Design a scalable video search system Design a Text-to-Video and Video-to-Video Search System Context You are tasked with designing an end-to-end mult...
ML System Design
13
0
246 people solved
Aug 8, 2025
Medium
Data ScientistShould Company Launch Vegan Burger Based on Profit Analysis?
Case: Launching a Vegan Burger — Unit Economics and Go/No-Go You are a data scientist supporting a product team that is deciding whether to launch a v...
Analytics & Experimentation
124
0
591 people solved
Jul 12, 2025
Medium
Software Engineer LockedDebug GPU Resource Allocation
This question evaluates debugging and root-cause analysis skills focused on GPU resource allocation, lease management, scoring and preemption policies...
Software Engineering Fundamentals
3
0
34 people solved
May 18, 2026