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
Hard
Software EngineerDesign IDE Sandbox and Payments
You are asked to discuss two system design prompts. For each one, define the users, functional requirements, non-functional requirements, APIs, core w...
System Design
9
0
88 people solved
Apr 7, 2026
Medium
Software Engineer LockedDesign an Online Coding Contest Platform
This question evaluates a candidate's ability to design a scalable, secure System Design for an online coding contest platform with emphasis on safely...
System Design
8
0
95 people solved
Apr 7, 2026
Medium
Software EngineerCount Distinct Values in a Huge Sorted Array
Implement count_distinct_sorted(values) for a very large ascending array that supports random access. Equal values appear in contiguous runs. Let d be...
Coding & Algorithms
1
0
4 people solved
May 13, 2026
Hard
Software Engineer LockedSolve Wonderful Strings and Grid Queries
This question evaluates algorithm design and data-structure competencies through two problems: a parity-constrained minimum-cost string transformation...
Coding & Algorithms
4
0
29 people solved
May 13, 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
245 people solved
Aug 8, 2025
Medium
Software Engineer LockedImplement a Composable Event Recommendation Engine
This question evaluates a candidate's skills in software design and implementation for recommendation systems, focusing on modular object-oriented arc...
Coding & Algorithms
6
0
83 people solved
Jan 21, 2026
Hard
Software Engineer LockedExplain your database experience and debugging approach
This question evaluates a candidate's practical database engineering knowledge, concurrency debugging skills, and ability to integrate and verify AI-a...
Software Engineering Fundamentals
16
0
128 people solved
Feb 4, 2026
Medium
Machine Learning EngineerSenior+ LockedBuild an LLM-driven text-game agent
This question evaluates a candidate's understanding of integrating large language models into interactive agents, including prompt design, game-state ...
Software Engineering Fundamentals
17
0
128 people solved
Dec 25, 2025
Medium
Software EngineerDesign a cross-region event processing platform
Scenario Design a cross-region event processing platform that ingests events from producers, stores them durably, and delivers them to multiple consum...
System Design
17
0
201 people solved
Dec 25, 2025
Easy
Software EngineerImplement cache and gift assignment system
You are given two independent programming problems. --- Problem 1: Implement a bounded key–value cache Design a data structure that stores key–value p...
Coding & Algorithms
37
1
378 people solved
Oct 1, 2025
Medium
Software Engineer LockedDesign a Distributed Rate Limiter
This question evaluates a candidate's understanding of distributed systems, rate limiting strategies, API design, consistency and scalability trade-of...
System Design
4
0
25 people solved
Jun 2, 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
375 people solved
Jan 7, 2026
Medium
Software EngineerDesign A Low-Latency Product Price Update API
Design an API and serving system for product prices. Each product price is updated at most once every 24 hours, but the product launch page needs low-...
System Design
2
0
31 people solved
Apr 24, 2026
Easy
Software EngineerDesign an Online Coding Judge
Design a large-scale online coding practice and contest platform. Users should be able to browse programming problems, submit code in multiple languag...
System Design
5
0
68 people solved
Apr 24, 2026
Medium
Backend EngineerResolve conflict across teams
Describe a time when you had to coordinate between two teams that were in conflict or seriously misaligned. What caused the disagreement, how did you ...
Behavioral & Leadership
14
0
117 people solved
Feb 18, 2026
Medium
Backend EngineerDesign a secure document vault
Design a secure document vault product similar to a cloud repository for sensitive files. The system should allow authenticated users to upload, store...
System Design
39
0
281 people solved
Feb 18, 2026
Medium
Data ScientistCompute an A/B test p-value by hand
In an A/B test on a game feature, you measure conversion rate (binary outcome). - Control: n₁ = 1000 users, x₁ = 120 conversions - Treatment: n₂ = 980...
Statistics & Math
13
0
104 people solved
Nov 4, 2025
Medium
Machine Learning EngineerDesign an enterprise RAG agent system
Design an enterprise AI assistant for internal company knowledge. The system should answer employee questions over documents such as policies, product...
ML System Design
4
0
68 people solved
Jan 20, 2026
Medium
Software EngineerImplement a Transactional Key-Value Store
Design an in-memory key-value store that supports transactions. Required operations: - set(key, value): assign or overwrite the value for a key. - get...
Coding & Algorithms
7
0
67 people solved
Apr 6, 2026
Medium
Site Reliability Engineer LockedTroubleshoot a Midnight Web Server Outage
This question evaluates a candidate's incident response, systems debugging, and root-cause analysis skills, focusing on log-driven investigation, Linu...
Software Engineering Fundamentals
14
0
112 people solved
Apr 6, 2026