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
Data ScientistEvaluate new-product notification feature
A marketplace team is considering building a feature that notifies buyers when new products relevant to their interests are listed. How would you dete...
Analytics & Experimentation
5
0
36 people solved
Jan 5, 2026
Easy
Data ScientistFind expected tosses to see a coin pattern
A fair coin is tossed repeatedly until a target length-3 pattern appears as a consecutive substring (e.g., HHH, HTH, HTT, etc.). 1) Describe a general...
Software Engineering Fundamentals
1
0
30 people solved
Jan 5, 2026
Medium
Software EngineerStore a hierarchy and return all children
Design a service to store a hierarchical tree of nodes and expose APIs. Requirements: - Persist a hierarchy (a forest with multiple roots is acceptabl...
System Design
4
0
68 people solved
Jan 5, 2026
Medium
Software Engineer LockedImplement four string-processing functions
This question evaluates string-processing and list-manipulation skills, including character membership testing and sequence filtering, reflecting comp...
Coding & Algorithms
15
0
121 people solved
Jan 5, 2026
Hard
Software EngineerDiagnose overloaded Kubernetes cluster
Kubernetes Overload: End-to-End Debug + Mitigation Plan You are given a Kubernetes-based microservices system that is currently overloaded, exhibiting...
System Design
12
0
104 people solved
Aug 13, 2025
Hard
Data ScientistDesign a time-series home-buy decision classifier
Take‑Home: Classifying Buy‑Now vs Wait Decisions in Housing Time Series Context You are given a monthly panel of regional housing and macro time serie...
ML System Design
9
0
83 people solved
Aug 13, 2025
Medium
Software EngineerBuild and Validate Passport Form UI
Passport Pattern Validation UI and Logic Context: Implement this in a vanilla HTML/CSS/JavaScript environment (single file, no frameworks). You are gi...
Software Engineering Fundamentals
5
0
49 people solved
Aug 13, 2025
Medium
Software EngineerDescribe conflict resolution and initiative
The behavioral round reportedly consisted of 7-8 standard questions. A polished version of the expected prompts would be: - Tell me about a time you h...
Behavioral & Leadership
5
0
75 people solved
Mar 4, 2026
Hard
Software EngineerSenior+Compare WebSocket, SSE, and long polling
You are building real-time features for a web application and the interviewer probes your networking fundamentals across several layers of the stack. ...
Software Engineering Fundamentals
3
0
54 people solved
Jan 4, 2026
Easy
Data ScientistInfer posterior after losing pick
Conditional probability after observing a loss You have three cats in a jumping contest: - Cat 1 (most athletic) wins with probability p1 - Cat 2 (mid...
Statistics & Math
7
0
78 people solved
Aug 11, 2025
Medium
Backend EngineerDistribute Annual Revenue Across Twelve Months
Distribute Annual Revenue Across Twelve Months Implement distribute_revenue(annual_cents). The input is a non-negative integer amount of annual revenu...
Coding & Algorithms
1
0
12 people solved
May 12, 2026
Hard
Software Engineer LockedFind a Valid Course Order
This question evaluates graph algorithm skills—specifically topological ordering, directed cycle detection, and analysis of time and space complexity....
Coding & Algorithms
0
0
6 people solved
May 12, 2026
Hard
Software Engineer LockedImplement a hierarchical file store
This question evaluates proficiency in modeling hierarchical file systems, path parsing and manipulation, managing mutable file contents, and analyzin...
Coding & Algorithms
4
0
21 people solved
May 12, 2026
Medium
Software EngineerImplement Employee Validation and Snake
This interview covered two coding tasks: 1. Employee validation - Implement a function that validates a collection of employees against a set of bu...
Coding & Algorithms
4
0
52 people solved
Mar 3, 2026
Easy
Software EngineerCount completed car journeys from sensor logs
You are given a time-ordered list of highway sensor logs. Each log entry contains: - timestamp (integer; strictly increasing) - sensor_type (one of "E...
Coding & Algorithms
6
0
100 people solved
Jan 3, 2026
Medium
Software Engineer LockedDesign an online ticket booking system
This question evaluates a candidate's proficiency in system design and distributed systems concepts, including scalability, availability, concurrency ...
System Design
5
0
67 people solved
Jan 3, 2026
Medium
Software Engineer LockedCompute shortest path in cyclic graph
This question evaluates understanding of graph algorithms and shortest-path computation in weighted directed graphs, including handling cycles, non-ne...
Coding & Algorithms
2
0
50 people solved
Jan 3, 2026
Medium
Software EngineerExplain why EDG and why you fit
Prompt You have 4 minutes of total time per question to prepare and answer. You may re-record / answer each question up to 2 times. Answer the followi...
Behavioral & Leadership
4
0
45 people solved
Jan 3, 2026
Hard
Software EngineerFix and harden an object pool
Fix and harden an object pool Refactor a Buggy C++ Object Pool Into a Correct, Thread-Safe Template Context You are given a buggy C++ object pool that...
System Design
8
0
120 people solved
Aug 10, 2025
Medium
Software EngineerSolve set equality and ad log top‑K
Problem Set (Coding) 1) Check whether two sets are equal You are given two integer arrays A and B that represent sets, except they may contain duplica...
Coding & Algorithms
19
0
201 people solved
Nov 11, 2025