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 Engineer LockedExplain PM collaboration and AI code quality
This question evaluates collaboration and leadership competencies in partnering with Product Managers and in managing code quality risks introduced by...
Behavioral & Leadership
1
0
16 people solved
May 26, 2026
Easy
Software EngineerDesign a Fault-Tolerant Wikipedia Archiver
Question Design a distributed system that archives all Wikipedia pages and keeps the archive current. You have one reliable primary machine, about one...
System Design
0
0
5 people solved
Apr 14, 2026
Medium
Machine Learning EngineerDesign Ordered CUDA Reduction
In CUDA, a parallel reduction can produce different results if the combination order is not fixed, especially for floating-point arithmetic where addi...
Software Engineering Fundamentals
6
0
56 people solved
Apr 14, 2026
Medium
Software EngineerDesign a Payment Fraud Detection Service
Design a real-time fraud detection service for a payment platform. When a user submits a payment attempt, the platform calls your service before autho...
System Design
10
0
87 people solved
Apr 14, 2026
Hard
Software EngineerImplement a Simplified std::vector in C++: Growth, Memory, Exception Safety, and Type Traits
Implement a simplified std::vector<T> from scratch in C++ — a dynamically growing array template. This is a classic C++ interview question at quantita...
Software Engineering Fundamentals
5
0
69 people solved
Sep 17, 2025
Medium
Machine Learning EngineerExplain CLIP, contrastive losses, and retrieval limits
Answer the following ML questions in the context of multi-modal (text–video/image) retrieval: 1) How does a CLIP-style model work conceptually (archit...
Machine Learning
10
0
123 people solved
Feb 3, 2026
Medium
Software EngineerMerge two N-ary trees by key rules
You are given two N-ary trees A and B. Each node has: - key (string): unique among siblings (i.e., within a node’s children list, no two children shar...
Coding & Algorithms
43
0
291 people solved
Nov 21, 2025
Medium
Software EngineerDesign leader election using Redis leases
Design Leader Election Using Redis Leases You have N stateless service instances all running the same code. At any instant, exactly one instance must ...
System Design
40
0
312 people solved
Oct 25, 2025
Medium
Software Engineer LockedKth Largest Perfect Binary Subtree
This question evaluates a candidate's ability to combine tree traversal with structural validation, requiring recognition of perfect binary subtrees a...
Coding & Algorithms
2
0
9 people solved
Jun 19, 2026
Medium
Software EngineerSenior+ LockedShortest Path in a Grid with Blocked Cells
This question tests a candidate's practical grasp of graph traversal algorithms applied to 2D grid problems, specifically BFS for unweighted shortest-...
Coding & Algorithms
0
0
11 people solved
Jun 19, 2026
Medium
Backend EngineerSenior+ AI LockedFix the Broken Search Filter in a Book Catalog API
This question tests a backend engineer's ability to implement correct filtering logic, including case-insensitive substring matching, whitespace trimm...
Coding & Algorithms
1
0
13 people solved
Jun 19, 2026
Medium
Software EngineerDesign a multi-timer using single underlying timer
You are given a Timer class that has access to a single underlying system timer API that can only keep one active timer at a time. Underlying single-t...
Software Engineering Fundamentals
18
0
137 people solved
Dec 4, 2025
Medium
Machine Learning EngineerPlan and lead a large recommendation project
You are given a recommendation design problem, but the interviewer focuses on leadership and execution rather than detailed modeling. Explain how you ...
Behavioral & Leadership
7
0
77 people solved
Feb 18, 2026
Medium
Machine Learning EngineerBuild model to predict package delivery time
You are building an ML model to predict package delivery time (ETA) for shipments. Given historical shipping data (order created time, origin/destinat...
Machine Learning
17
0
154 people solved
Feb 18, 2026
Hard
Product ManagerTikTok Product Strategy & Case Design
Product Decision-Making and Design Prompts: TikTok PM You are interviewing for a Product Manager role. Answer the following mini-prompts. State assump...
Product / Decision Making
17
0
111 people solved
Jul 4, 2025
Hard
Software EngineerCount Bounded Buy-and-Sell Sequences
Count Bounded Buy-and-Sell Sequences You start with k shares. On each transaction day, you either buy one share or sell one share, but holdings may ne...
Coding & Algorithms
0
0
4 people solved
May 3, 2026
Easy
Software Engineer LockedImplement a Unique Lines Command
This question evaluates mastery of file I/O, streaming algorithms, stateful line processing, and memory-efficient handling of large inputs, situating ...
Coding & Algorithms
3
1
36 people solved
May 25, 2026
Medium
Machine Learning Engineer LockedSolve Seven Python Image and Data Tasks
This multi-part Python assessment evaluates image and data processing competencies including array and matrix manipulation (center crop, rotation), nu...
Coding & Algorithms
0
0
11 people solved
May 25, 2026
Medium
Software Engineer LockedCompute Exclusive Execution Times
This question evaluates understanding of nested function execution and precise exclusive-time accounting derived from chronological logs, emphasizing ...
Coding & Algorithms
0
0
16 people solved
May 25, 2026
Hard
Software EngineerDesign sliding-window rate limiter with multi-keys
Design sliding-window rate limiter with multi-keys Design a Precise Sliding-Window Rate Limiter Context You are designing a rate limiter for an API th...
System Design
54
0
488 people solved
Jul 16, 2025