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
Easy
Software Engineer LockedImplement flood fill using BFS and DFS
This question evaluates proficiency in graph traversal and matrix manipulation, specifically the implementation of BFS and DFS variants for flood fill...
Coding & Algorithms
16
0
194 people solved
Jan 22, 2026
Easy
Machine Learning Engineer LockedImplement an LRU Cache
This question evaluates a candidate's competency in designing efficient cache mechanisms and managing time and space complexity for operations require...
Coding & Algorithms
17
0
179 people solved
Jan 22, 2026
Medium
Data EngineerSolve two interval array problems
You are given two interval-based tasks from a technical screen for a data engineering role. 1. Merge overlapping intervals - Input: an array of int...
Coding & Algorithms
8
0
90 people solved
Feb 18, 2026
Medium
Software Engineer LockedDebug a Project Assignment Codebase
This question evaluates debugging, state management, test-driven troubleshooting, data filtering correctness, and the ability to maintain a public API...
Software Engineering Fundamentals
31
0
233 people solved
Jan 4, 2026
Easy
Data ScientistInternFour Fair Coins: Expected Payoff and Pricing Two Magic Wands
You play the following game: four fair coins are tossed at the same time. For every coin that lands heads, you are paid \$1. The interviewer walks you...
Machine Learning
4
0
64 people solved
Sep 11, 2025
Medium
Software EngineerNew GradSolve tree and DP problems
This coding round contained two algorithm questions: 1. Deepest shared ancestor in a binary tree You are given the root of a binary tree and two ...
Coding & Algorithms
40
0
277 people solved
Oct 24, 2025
Medium
Software Engineer LockedDesign a Global Marketing Email Platform
This question evaluates a candidate's ability to design a scalable, reliable distributed system for global marketing email delivery, encompassing time...
System Design
18
0
169 people solved
Jan 21, 2026
Medium
Software EngineerExplain code complexity and design two games
You are given three independent interview prompts. 1) Code comprehension & complexity - Given two short code snippets (language-agnostic), explain in ...
Software Engineering Fundamentals
53
0
373 people solved
Feb 8, 2026
Hard
Software EngineerImplement Persistent KV Store Serialization
Implement a persistent in-memory key-value store. Requirements: - Keys and values are arbitrary byte strings or UTF-8 strings; do not rely on delimite...
Coding & Algorithms
8
0
48 people solved
Apr 20, 2026
Medium
Software EngineerQuery an Indexed In-Memory Numeric Table
Query an Indexed In-Memory Numeric Table Problem Implement queryIndexedRows(rows, queries) -> answers for one immutable in-memory table containing onl...
Coding & Algorithms
0
0
5 people solved
Jul 27, 2026
Medium
Software EngineerDesign in-memory trade subscription processor
You are asked to design and implement the internal logic of an in-memory trade subscription processor in C++. A simplified interface is provided: `cpp...
System Design
14
0
287 people solved
Oct 16, 2025
Hard
Software EngineerDesign and backtest a trading strategy
Minute-Level Mean-Reversion Strategy: Design, Backtest, Validation, and Significance Context You are given minute-level OHLCV data (open, high, low, c...
Analytics & Experimentation
19
0
370 people solved
Aug 13, 2025
Hard
Software EngineerDesign a News Aggregator
Design a news aggregation system that collects articles from many external news sources and serves a unified feed to end users. A key constraint is th...
System Design
14
0
134 people solved
Mar 18, 2026
Easy
Data Scientist LockedSketch distributions and compare mean/median/mode
This question evaluates understanding of distributional shape, central tendency (mean, median, mode), skewness, outliers, and the effects of combining...
Statistics & Math
10
0
92 people solved
Feb 16, 2026
Easy
Software EngineerSolve four classic algorithm problems
You are given four independent coding tasks. For each task, implement the required function. --- Problem 1: Zigzag level-order traversal of a binary t...
Coding & Algorithms
21
0
172 people solved
Nov 30, 2025
Medium
Software Engineer LockedDesign a Merchant Ledger Service
This question evaluates system design skills related to modeling monetary values, transactional integrity, idempotency, auditability, concurrency cont...
System Design
16
0
198 people solved
Oct 7, 2025
Medium
Software Engineer LockedExplain a Difficult Project and a Colleague Conflict
Prepare evidence-based stories about your most difficult project and a substantive colleague conflict. Explain constraints, alternatives, personal dec...
Behavioral & Leadership
3
0
21 people solved
Jun 9, 2026
Medium
Frontend Engineer LockedExecutive-Round Behavioral: Proactive Decision-Making in Career and Projects
This question evaluates a candidate's ability to communicate agency and ownership across career choices and past project work. It tests whether someon...
Behavioral & Leadership
3
0
57 people solved
Jun 9, 2026
Medium
Software Engineer LockedJava Core Deep Dive: Concurrent Collections and Java 8 Features
This question evaluates a candidate's depth of knowledge of the Java standard library, covering thread-safety mechanics in concurrent collections and ...
Software Engineering Fundamentals
1
0
39 people solved
Jun 9, 2026
Medium
Software Engineer LockedDesign a one-to-one chat system
This question evaluates a candidate's ability to design scalable, real-time one-to-one messaging systems, testing competencies in transport choice for...
System Design
35
0
642 people solved
Mar 28, 2026