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 EngineerDesign concurrent range-aware file caching client
Design concurrent range-aware file caching client System Design: High-throughput Client-side Ranged-read File Cache You are asked to design and specif...
System Design
35
0
597 people solved
Aug 9, 2025
Medium
Machine Learning EngineerSenior+ LockedDesign Detection Systems for Risk and Safety
This question evaluates a machine learning engineer's competence in designing end-to-end detection systems for risk and safety, covering skills in dat...
ML System Design
8
0
77 people solved
Feb 21, 2026
Hard
Software Engineer LockedImplement a search autocomplete suggestion service
This question evaluates proficiency in designing efficient prefix-matching and ranking mechanisms, including management of incremental query state and...
Coding & Algorithms
11
0
92 people solved
Feb 11, 2026
Medium
Software EngineerDebug and extend obstacle-run statistics classes
Problem: Obstacle course run statistics (debug + implement) You are building software to track how long racers take to complete an obstacle course. Do...
Coding & Algorithms
29
0
226 people solved
Feb 11, 2026
Medium
Software EngineerHandle traffic spikes and estimate server capacity
Scenario You are designing and operating a backend service that receives API requests from clients. Recently, the service becomes slow or times out wh...
System Design
12
0
145 people solved
Feb 11, 2026
Hard
Software EngineerDesign in-memory DB with TTL and history
In-Memory Database: Progressive Design in 4 Levels You are designing a simplified in-memory database to be implemented in four progressive levels. Eac...
System Design
61
0
455 people solved
Sep 6, 2025
Hard
Software EngineerDetermine identical files ignoring metadata
Question How would you determine whether two files contain identical bytes while ignoring all filesystem metadata? Propose and justify a hashing-based...
System Design
78
0
548 people solved
Sep 6, 2025
Medium
Software EngineerPresent a project deep dive
Behavioral: End-to-End Project Deep Dive (Concise Slide Deck) In the project deep-dive round, the interviewer asks you to present one significant proj...
Behavioral & Leadership
44
0
330 people solved
Sep 6, 2025
Medium
Data EngineerExplain seasons and compound interest
Answer the following basic reasoning questions: 1. Why is summer generally hotter than winter? 2. Suppose you invest $1,000 at a 100% annual interest ...
Software Engineering Fundamentals
8
0
111 people solved
Apr 4, 2026
Hard
Software Engineer LockedDesign a Hotel Booking System
This question evaluates system design and backend architecture competencies, including data modeling, transactional integrity, concurrency control, sc...
System Design
39
0
369 people solved
Feb 1, 2026
Hard
Machine Learning Engineer LockedExplain precision/recall and compute NN output
This question evaluates understanding of classification evaluation metrics (precision, recall, F1), ensemble learning principles (bagging vs boosting,...
Machine Learning
13
0
139 people solved
Feb 1, 2026
Easy
Data ScientistCompute decay, OLS, and classic probability results
You are asked several probability/statistics questions. 1) Radioactive decay (half-life) A radioactive atom has a half-life of 1 day. Assume each atom...
Statistics & Math
13
0
200 people solved
Dec 9, 2025
Medium
Machine Learning Engineer LockedExplain FlashAttention, KV cache, and RoPE
This question evaluates understanding of transformer attention optimizations (FlashAttention), autoregressive decoding state management (KV cache), an...
Machine Learning
6
0
102 people solved
Jan 22, 2026
Hard
Software Engineer LockedMaximize distinct values after unique ± offsets
This question evaluates combinatorial reasoning and algorithmic optimization skills, focusing on transforming arrays under distinct integer-offset con...
Coding & Algorithms
38
1
274 people solved
Jan 22, 2026
Medium
Software Engineer LockedDesign a file upload and scanning report system
This question evaluates a candidate's ability to design scalable, secure distributed systems for asynchronous file handling, including API design, dat...
System Design
19
0
149 people solved
Jan 22, 2026
Easy
Software Engineer LockedDeterministic Task Execution Order
This question evaluates a candidate's ability to model task dependencies as a directed graph and produce a valid execution order, a core graph algorit...
Coding & Algorithms
2
1
13 people solved
Jun 22, 2026
Hard
Software EngineerDesign an Online Game Leaderboard
Question Design the backend system for an online game's leaderboard. The system should support: 1. Recording and updating player scores from game sess...
System Design
18
0
152 people solved
Apr 27, 2026
Medium
Data Scientist LockedMeasure a Discovery Boost in a Two-Sided Marketplace
Design a measurement plan for a discovery change in a two-sided marketplace. The interview question evaluates metric selection, experiment design, int...
Analytics & Experimentation
1
0
19 people solved
May 23, 2026
Medium
Data Scientist LockedDebug a Python Aggregation Loop with Dictionaries and Lists
Review a Python aggregation routine that uses dictionaries, lists, and loops, then explain how you would make it correct and robust. This interview ex...
Software Engineering Fundamentals
5
0
40 people solved
May 23, 2026
Medium
Data ScientistMeasure Shopify App Store Success
You are a Data Scientist working on the Shopify App Store, a marketplace that connects Shopify merchants with third-party app developers. Merchants us...
Analytics & Experimentation
14
0
115 people solved
Apr 3, 2026