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 EngineerSenior+ LockedDesign a Hybrid Evaluation Platform
This question evaluates skills in designing scalable ML evaluation platforms, covering architecture, data modeling, human-in-the-loop workflows, LLM-b...
ML System Design
19
0
137 people solved
Feb 6, 2026
Hard
Data ScientistEvaluate a new ranking model
A food-delivery company serves homepage store recommendations with ranking model V1.1. A new model V2.0 adds several new features and may require a di...
Analytics & Experimentation
18
0
238 people solved
Feb 6, 2026
Hard
Software EngineerDetect Currency Arbitrage After a Cycle Fee
Detect Currency Arbitrage After a Cycle Fee You are given a matrix of positive currency exchange rates, where rates[i][j] units of currency j are rece...
Coding & Algorithms
0
0
5 people solved
May 3, 2026
Medium
Software EngineerOrder Classes by Prerequisites with Recursive DFS
Order Classes by Prerequisites with Recursive DFS Implement class_order(classes, prerequisites) using recursive depth-first search. classes contains d...
Coding & Algorithms
1
0
17 people solved
May 3, 2026
Medium
Software Engineer LockedImplement Stable Softmax
This question evaluates understanding of numerical stability, floating-point arithmetic, normalization, and probability distributions when computing s...
Coding & Algorithms
1
0
13 people solved
May 3, 2026
Medium
Data Scientist LockedSolve Probability and Statistics Questions
This question evaluates proficiency in statistical modeling (ordinary least squares linear regression), probability theory (law of large numbers and c...
Machine Learning
6
0
81 people solved
May 3, 2026
Hard
Machine Learning EngineerImplement n-gram model and select n
Implement n-gram model and select n Task: Implement an n-gram Language Model with Training, Sampling, and Model Selection Guidance Objective Implement...
Machine Learning
22
0
290 people solved
Aug 8, 2025
Hard
Data Scientist LockedWhy Use a t-Statistic?
This question evaluates understanding of the t-statistic as a standardized measure for testing whether an estimated effect differs from zero, covering...
Statistics & Math
5
0
109 people solved
Mar 18, 2026
Medium
Data EngineerSenior+ LockedExplain How AI Changes Data Engineering Work
Explain how AI-assisted tools could reshape data engineering while preserving human accountability. Cover risk-based task boundaries, privacy, indepen...
Behavioral & Leadership
2
0
16 people solved
May 20, 2026
Medium
Backend EngineerSenior+ LockedDesign a Train Ticket Booking System
This question evaluates a backend engineer's competency in object-oriented design, SOLID principles, API and service design, data modeling, concurrenc...
Software Engineering Fundamentals
3
0
25 people solved
May 20, 2026
Medium
Software Engineer LockedImplement a Recipe Cart
This question evaluates the ability to design and implement stateful data structures and aggregation logic for tracking ingredient counts, applying ti...
Coding & Algorithms
6
0
45 people solved
May 20, 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
Data Scientist LockedEvaluate Carousel and Billboard Lift
This question evaluates experiment design, causal inference, metric definition, diagnostic analysis, and measurement validity within the Analytics & E...
Analytics & Experimentation
15
0
123 people solved
Jan 11, 2026
Medium
Data ScientistImplement a high-throughput web crawler safely
Design and code (pseudocode acceptable) a multi-threaded web crawler that favors breadth-first discovery while continuously running analysis tasks on ...
Coding & Algorithms
12
0
148 people solved
Oct 13, 2025
Hard
Data ScientistPrioritize six improvements for a favorite app
Case Prompt: Product Thinking, Modeling, and Experimentation Choose one consumer mobile app you personally use weekly. 1. Propose exactly six concrete...
Behavioral & Leadership
3
0
71 people solved
Oct 13, 2025
Hard
Data ScientistExplain SHAP vs VIF under collinearity
High Collinearity in Binary Classification: VIF, SHAP, and Interpretation Strategy You are modeling a binary outcome Y. Two numeric features A and B a...
Machine Learning
5
0
112 people solved
Oct 13, 2025
Medium
Backend EngineerSenior+ AIDesign Idempotent Due-Date and Hold Notifications
Design Idempotent Due-Date and Hold Notifications Extend a library-management system with two notification workflows: 1. A patron receives a notificat...
System Design
2
0
27 people solved
May 2, 2026
Medium
Software Engineer LockedEvaluate Symbol Expressions
This question evaluates the ability to parse and evaluate arithmetic expressions with symbol references, perform recursive dependency resolution, and ...
Coding & Algorithms
3
0
41 people solved
May 2, 2026
Hard
Software Engineer LockedSchedule Non-Overlapping Meetings Efficiently
This question evaluates understanding of interval scheduling and overlap detection, proficiency in selecting efficient data structures for dynamic ord...
Coding & Algorithms
9
0
67 people solved
May 2, 2026
Medium
Software EngineerDesign Event Email System
Design Event Email System Design an event system that can manage at least 1,000,000 concurrent events and send notification emails to every registered...
System Design
44
0
371 people solved
Aug 4, 2025