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 EngineerImplement A* Maze Search
Implement maze pathfinding in C++. You are given an m x n grid where '.' is an open cell, '#' is a wall, S is the start, and T is the target. You may ...
Coding & Algorithms
4
0
78 people solved
Mar 2, 2026
Medium
Software EngineerDesign paginated list UI and pagination API
Scenario You are building a web page that displays a list of items (e.g., posts, products, or users). The list must be paginated, and users can click ...
System Design
9
0
150 people solved
Oct 14, 2025
Medium
Data ScientistDerive lower bound for equicorrelation rho
Equicorrelation Matrix PSD Condition Setup Consider zero-mean, unit-variance random variables whose pairwise correlations are all equal to a common va...
Statistics & Math
11
0
90 people solved
Oct 13, 2025
Hard
Data ScientistDemonstrate leadership with concrete STAR examples
Behavioral & Leadership (Onsite) — STAR Examples With Metrics Provide succinct STAR-format examples (Situation, Task, Action, Result), with specific m...
Behavioral & Leadership
13
0
114 people solved
Oct 13, 2025
Hard
Data ScientistDescribe best team and complex project
Behavioral & Technical Deep-Dive Part 1 — Best Team You Worked On Describe a high-performing team you were part of. Include: 1. Mission and business i...
Behavioral & Leadership
5
0
51 people solved
Oct 13, 2025
Medium
Data ScientistTransform and aggregate messy event data
Using pandas (vectorized; no loops), clean, combine, and aggregate the following to produce country/plan day-level metrics for 2025-08-31. DataFrames ...
Data Manipulation (SQL/Python)
13
0
241 people solved
Oct 13, 2025
Hard
Machine Learning EngineerModel other agents in simulation
Scenario You are building a driving simulation environment for training/evaluating an autonomous agent (planning or RL). Besides the ego vehicle, the ...
ML System Design
18
0
287 people solved
Feb 12, 2026
Medium
Software EngineerExplain the Project You Are Most Proud Of
Question Tell me about the project you are most proud of. Explain why it mattered, what you personally owned, the hardest decision you made, and how y...
Behavioral & Leadership
0
0
3 people solved
May 22, 2026
Easy
Data EngineerInternValidate a Password Against Explicit Security Rules
Problem A password is secure when all of the following are true: - It has at least six characters. - It contains at least one digit. - It contains at ...
Coding & Algorithms
0
0
3 people solved
May 22, 2026
Medium
Data ScientistAnalyze Thirty-Day Ad Performance with SQL
Analyze Thirty-Day Ad Performance with SQL For this practice version, use the following neutral schema. clicked is a Boolean recorded on each impressi...
Data Manipulation (SQL/Python)
2
0
26 people solved
May 22, 2026
Hard
Software EngineerSenior+ LockedChoose models for trading tasks
This question evaluates a candidate's competency in selecting and reasoning about machine learning models for quantitative trading and pricing, includ...
Machine Learning
7
0
89 people solved
Jan 26, 2026
Medium
Software Engineer LockedImplement a Shape interface using OOP
This question evaluates a candidate's competency in object-oriented design and implementation, covering concepts such as interfaces, encapsulation, po...
Software Engineering Fundamentals
3
0
65 people solved
Mar 1, 2026
Medium
Data EngineerAnswer DE behavioral and ramp-up questions
Answer the following behavioral questions for a Data Engineer (or data-focused full-stack) role. Provide specific examples. 1. Project under a tight d...
Behavioral & Leadership
6
0
74 people solved
Mar 1, 2026
Medium
Software Engineer LockedDesign a TikTok-like short video platform
This question evaluates skills in large-scale system design for short-video platforms, including video ingestion and transcoding, storage and CDN stra...
System Design
21
0
342 people solved
Mar 1, 2026
Medium
Software Engineer LockedDistinguish Permit Requirement Outcomes
This question evaluates software design and implementation skills, focusing on domain modeling of a tri-state permit status, condition matching via se...
Coding & Algorithms
2
0
26 people solved
Apr 8, 2026
Medium
Software EngineerFind minimal time for four people crossing
Assume there are four people who need to cross a narrow bridge at night using a single flashlight. - Each person \(i\) requires a different, known amo...
Coding & Algorithms
6
0
89 people solved
Dec 8, 2025
Hard
Machine Learning EngineerDesign a scalable video search system
Design a scalable video search system Design a Text-to-Video and Video-to-Video Search System Context You are tasked with designing an end-to-end mult...
ML System Design
13
0
246 people solved
Aug 8, 2025
Medium
Software Engineer LockedDesign a multithreaded event logger
This question evaluates a candidate's competency in concurrent programming, synchronization primitives, ordering guarantees, and durable logging mecha...
Software Engineering Fundamentals
45
0
361 people solved
Dec 8, 2025
Easy
Data Scientist LockedResolve Simpson’s paradox in A/B email test
This question evaluates understanding of Simpson's paradox, causal inference, A/B testing and experimental design within the Analytics & Experimentati...
Analytics & Experimentation
4
0
59 people solved
Feb 11, 2026
Hard
Software Engineer LockedAssemble async stream reads into objects
This question evaluates a developer's skill in asynchronous stream I/O, buffer management, and binary parsing in C#, including correctly handling part...
Coding & Algorithms
7
0
52 people solved
Feb 11, 2026