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
Easy
Data ScientistDiagnose drop in shopper order acceptance
Question Marketplace diagnosis case. A grocery-delivery marketplace (Instacart-style) observes that on Sunday afternoon, the number of orders that sho...
Analytics & Experimentation
5
0
44 people solved
Oct 10, 2025
Easy
Data ScientistExplain p-values and interpret regressions
Question This is a statistics rapid-fire onsite for a Data Scientist role. Answer each part clearly and precisely — first as if explaining to a Produc...
Statistics & Math
7
0
57 people solved
Oct 10, 2025
Medium
Software EngineerDesign collaborative document editing backend
You are asked to design the backend for a real-time collaborative document editor similar to Google Docs. The interviewer is specifically interested i...
System Design
14
0
104 people solved
Nov 25, 2025
Medium
Machine Learning Engineer LockedExplain Core ML Fundamentals
Review ML fundamentals including logistic regression, cross-entropy loss, batch versus stochastic gradient descent, batch size tradeoffs, overfitting,...
Machine Learning
6
0
58 people solved
May 3, 2025
Medium
Software EngineerDescribe handling conflict and a proud project
Behavioral interview prompts: 1. Tell me about a time you had a conflict with a teammate (e.g., disagreement on design, priorities, or code quality). ...
Behavioral & Leadership
11
0
80 people solved
Jan 14, 2026
Medium
Data Scientist LockedCompute gambler’s ruin probabilities and hitting times
This question evaluates understanding of stochastic processes, Markov chains, and discrete-time random walks by requiring derivation of absorption pro...
Machine Learning
6
0
58 people solved
Jan 14, 2026
Medium
Software Engineer LockedExplain Amdahl’s law and GPU matmul optimization
This question evaluates understanding of systems and performance fundamentals including parallel speedup (Amdahl’s law), GPU memory hierarchy and thre...
Software Engineering Fundamentals
7
0
92 people solved
Jan 14, 2026
Medium
Software EngineerDesign a Checkers Game Simulator
Design and partially implement an object-oriented simulator for a two-player checkers-like board game. Requirements: - The game is played on an 8 x 8 ...
Software Engineering Fundamentals
4
0
65 people solved
Mar 11, 2026
Medium
Machine Learning Engineer LockedDesign an Editable Text Buffer
This question evaluates data structure design, mutable state management, undo/redo semantics, and prefix-based autocomplete indexing with dynamic freq...
Coding & Algorithms
23
0
170 people solved
Mar 11, 2026
Easy
Software EngineerSenior+Design a Synchronous Text Classification API
Design a Synchronous Text Classification API A trained machine-learning model classifies text. Design the system that exposes this model through synch...
ML System Design
1
0
10 people solved
May 17, 2026
Hard
Software EngineerModel advertiser intake database schema
Model advertiser intake database schema Advertiser Intake and Campaign Data Model (F1-style) Context You are designing a multi-tenant advertiser intak...
System Design
20
0
298 people solved
Jul 17, 2025
Medium
Software EngineerEstimate expected comparisons in a BST
Estimate expected comparisons in a BST In a particular binary search tree, finding node A takes 1 comparison and finding node D takes 3 comparisons. W...
Coding & Algorithms
17
0
144 people solved
Jul 17, 2025
Hard
Software EngineerImplement a persistent sharded key-value store
Problem Implement a simple key–value store that persists data on disk. You must store the data in fixed-size shards, where each shard is saved in one ...
Coding & Algorithms
79
1
1005 people solved
Nov 24, 2025
Medium
Software Engineer LockedImplement Three Research Coding Tasks
This multi-part question evaluates skills in differentiable linear algebra and automatic differentiation safety, memory- and buffer-aware numerical im...
Coding & Algorithms
5
0
48 people solved
Jan 13, 2026
Medium
Machine Learning Engineer LockedImplement K-means clustering from scratch
This question evaluates a candidate's understanding of clustering algorithms and practical implementation skills in unsupervised machine learning, inc...
Coding & Algorithms
8
0
122 people solved
Jan 13, 2026
Hard
Machine Learning EngineerDesign a real-time game recommendation system
Design a real-time game recommendation system System Design: Real‑Time Game Recommendation System (Architecture Focus) You are designing a real‑time r...
ML System Design
11
0
192 people solved
Jul 16, 2025
Hard
Software EngineerDesign a hot-listing waitlist API
Design a hot-listing waitlist API System Design: Waitlist API for High-Demand Listings Context You are designing a waitlist system for a marketplace t...
System Design
25
0
235 people solved
Jul 16, 2025
Easy
Software EngineerAnswer HR screening questions for data role
** HR HR 1. 2. 3. 4. 5. 6. 7. 8. 30 HR **
Behavioral & Leadership
6
0
107 people solved
Oct 8, 2025
Hard
Software EngineerAdd TTL to an LRU cache
Design an in-memory LRU cache and explain how to extend it with TTL support. Requirements: - get(key) returns the value if the key exists and has not ...
Software Engineering Fundamentals
3
0
61 people solved
Mar 10, 2026
Medium
Machine Learning Engineer LockedDesign quality checks for spreadsheet LLM data
This question evaluates a candidate's competency in designing data-quality validation pipelines and in assessing the need for fine-tuning of pretraine...
ML System Design
5
0
73 people solved
Mar 10, 2026