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 EngineerDesign Real-Time Collaborative Comments
Design a real-time commenting system for a collaborative canvas or document. Users should see new comments quickly, receive updates on threads, and re...
System Design
8
0
86 people solved
Apr 9, 2026
Hard
Software Engineer LockedImplement a Clean In-Memory Transaction Ledger
Build a clean in-memory ledger for deposits, withdrawals, transfers, and balance queries using integer cents. Preserve atomic transfers, reject overdr...
Software Engineering Fundamentals
7
0
64 people solved
May 25, 2026
Medium
Software EngineerSenior+ LockedRate Engineering Work Simulation Responses
This question evaluates situational judgment and behavioral leadership competencies in a software engineering context, focusing on ownership, communic...
Behavioral & Leadership
26
0
186 people solved
Jun 2, 2026
Hard
Data ScientistDebug and fix a PyTorch Transformer training loop
Minimal Causal LM Debugging and Optimization You are given a tiny causal decoder-only language model implemented in PyTorch. It appears to "train" but...
Machine Learning
315
0
2140 people solved
Oct 13, 2025
Hard
Software EngineerDesign a REST API Abstraction Layer
Design a REST API Abstraction Layer (Internal Service-Client SDK) A company runs many application servers that call internal REST services. Today, eve...
System Design
29
0
241 people solved
Apr 5, 2026
Easy
Software Engineer LockedDesign a Slack-Like Messaging Platform
This question evaluates a candidate's competency in designing scalable, low-latency distributed messaging architectures, covering conversation modelin...
System Design
24
0
253 people solved
May 2, 2026
Hard
Data ScientistPredict bike demand and avoid overfitting
You are given historical data for a city bike-sharing system. Available fields include station_id, hourly timestamp, number of bike pickups and return...
Machine Learning
16
1
163 people solved
Mar 13, 2026
Hard
Software Engineer LockedAggregate Recent Message Events And Active Chats
Prepare for a stateful event aggregation coding prompt over chat events and active chats in a rolling five-minute window. The question is useful for d...
Coding & Algorithms
66
1
440 people solved
Jun 5, 2026
Medium
Data ScientistPresent Recent Analytics Work for a Recruiter
Describe your most recent work to a recruiter, then identify one additional experience you would want the recruiter to share with the hiring team. Mak...
Behavioral & Leadership
1
0
22 people solved
Jul 8, 2026
Hard
Software EngineerConvert Stack Samples into Trace Events
Convert Stack Samples into Trace Events The source reports converting sampled call stacks into trace events but does not provide the exact tuple forma...
Coding & Algorithms
2
0
37 people solved
Jul 8, 2026
Hard
Software EngineerDesign an ad frequency capping system
Design a real-time ad frequency capping system for an ads platform. When the ad server is deciding whether to show an ad to a user, it must enforce ca...
System Design
206
0
1616 people solved
Mar 9, 2026
Medium
Software EngineerDesign a Read-Once Chat System
Design a chat messaging system where one sender can select multiple recipients at send time, but the message is not a group chat message. Instead, the...
System Design
25
0
208 people solved
Apr 6, 2026
Medium
Software EngineerThree Array Problems for Trading Geometry and Grouping
Problem Implement solve(prices, numbers, people, group_size) and return an object with three fields. 1. max_profit: the maximum profit from buying onc...
Coding & Algorithms
1
0
28 people solved
May 11, 2026
Medium
Software EngineerIntern LockedValidate AI-Generated Code Safely
This question evaluates experience with generative AI tools and the competency in validating AI-generated code for correctness, maintainability, and s...
Software Engineering Fundamentals
112
1
941 people solved
May 11, 2026
Medium
Software EngineerDelete One Character Type to Minimize Unique Segments
Problem Implement min_unique_segments_after_deletion(s) for a nonempty lowercase English string. Choose exactly one character value that appears in s ...
Coding & Algorithms
2
0
38 people solved
Jul 13, 2026
Medium
Frontend EngineerDiagnose Cold-Load and Massive-Table Performance in a Web App
Diagnose Cold-Load and Massive-Table Performance in a Web App You are reviewing two frontend performance problems. Explain how you would measure each ...
Software Engineering Fundamentals
2
0
24 people solved
Jul 13, 2026
Easy
Software EngineerSenior+Parse and Summarize HTTP Access Logs
Parse and Summarize HTTP Access Logs Given a list of raw access-log strings, parse valid records and report the number of total requests, client error...
Software Engineering Fundamentals
2
0
22 people solved
May 3, 2026
Medium
Software Engineer LockedDesign a Personalized Content Recommendation Engine
This question evaluates a candidate's ability to design a large-scale personalized recommendation system, covering problem framing, candidate retrieva...
ML System Design
2
0
30 people solved
Jun 17, 2026
Medium
Machine Learning Engineer AIBuild an Ollama Eval Harness
Design and implement a lightweight evaluation harness for a language model served locally through Ollama. The harness should: - Read a dataset of eval...
ML System Design
19
0
181 people solved
Mar 19, 2026
Hard
Machine Learning Engineer LockedBias-Variance Tradeoff and Vanishing Gradients in Feedforward Networks
This question evaluates conceptual understanding of the bias-variance tradeoff and the vanishing-gradient problem in deep feedforward networks, two co...
Machine Learning
8
0
117 people solved
Jun 12, 2026