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 Engineer LockedAlternate Odd and Even Numbers with Two Threads
This question evaluates a candidate's understanding of multithreading and synchronization primitives such as locks and condition variables. It tests t...
Coding & Algorithms
0
0
6 people solved
Jun 11, 2026
Medium
Machine Learning EngineerSenior+Optimize Model Serving Under 200ms
A data science team gives you a trained model and asks you to deploy it as an online inference service. The requirement is that a single prediction mu...
ML System Design
2
0
32 people solved
Mar 7, 2026
Medium
Product ManagerDescribe your product leadership experience
Describe your product leadership experience Tell me about your product management background. Describe a product you owned, how you managed the roadma...
Behavioral & Leadership
7
0
80 people solved
Jul 22, 2025
Medium
Machine Learning EngineerHow would you prevent wrong items in deliveries?
Behavioral / Product-Process Scenario You work on a food delivery platform. Customers sometimes receive the wrong items (restaurant packed incorrectly...
Behavioral & Leadership
5
0
102 people solved
Oct 17, 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 EngineerCan the character reach the destination?
You control a character starting at a start cell and want to reach a target cell in a 2D grid. Some cells are blocked by obstacles and cannot be enter...
Coding & Algorithms
10
0
105 people solved
Dec 21, 2025
Medium
Software EngineerDesign a Real-Time Trending Hashtags System
Design the backend system that detects and serves trending hashtags from posts on a large social network (Facebook-scale). The service continuously in...
System Design
2
0
18 people solved
Mar 6, 2026
Medium
Software EngineerHow to root-cause Wi‑Fi chip stops after 30 minutes
You are running automated tests on a Wi‑Fi chip. The chip transmits normally at the beginning, but after about 30 minutes it stops transmitting (no si...
Software Engineering Fundamentals
8
0
132 people solved
Mar 6, 2026
Medium
Software EngineerCount Spellings Using Chemical Element Symbols
Count Spellings Using Chemical Element Symbols Problem Given a list of valid chemical element symbols and a target word, count how many distinct ways ...
Coding & Algorithms
0
1
9 people solved
Apr 19, 2026
Medium
Software EngineerImplement a Least-Recently-Used Cache
Design and implement an in-memory least-recently-used cache. Requirements: - The cache is initialized with a positive integer capacity. - Implement ge...
Coding & Algorithms
1
0
9 people solved
Apr 19, 2026
Medium
Software Engineer LockedDesign a Daily Puzzle Platform
This question evaluates backend system-design skills including API design, data modeling, service decomposition, scaling and consistency trade-offs, s...
System Design
6
0
81 people solved
Apr 19, 2026
Hard
Machine Learning EngineerDesign LLM search handling long token inputs
Design an LLM-powered search and question-answering system over a large corpus of documents such as internal wikis, PDFs, logs, contracts, and web pag...
ML System Design
18
0
184 people solved
Apr 6, 2025
Hard
Software EngineerSenior+Find valid split-stay listing combinations
You are building a feature that suggests a split stay: a guest stays in one home for the first part of a trip, then switches to a second home for the ...
Coding & Algorithms
142
2
918 people solved
Dec 20, 2025
Medium
Software EngineerInternFind the Best Currency Conversion Rate
Problem You are given directed currency conversions [from, to, rate]. Converting an amount across a path multiplies it by every edge rate. Return the ...
Coding & Algorithms
0
0
6 people solved
Nov 16, 2025
Medium
Software EngineerDesign a Redundant Railroad Crossing
Design a safe and redundant control system for an at-grade railroad crossing used by road vehicles and pedestrians. The system should detect approachi...
System Design
5
0
53 people solved
Jan 25, 2026
Medium
Software EngineerImplement a Connection Pool
You are given an existing DBConnection class that simulates a physical database connection. It exposes the following methods and must not be modified:...
Software Engineering Fundamentals
20
0
163 people solved
Jan 25, 2026
Medium
Machine Learning EngineerSenior+ LockedDescribe Cross-Functional Project Leadership
This question evaluates cross-functional leadership, stakeholder management, and program-level decision-making competencies in the context of machine ...
Behavioral & Leadership
3
0
28 people solved
Jun 10, 2026
Medium
Data ScientistSolve queue switch and coin change puzzles
This entry contains two separate interview-style quantitative/algorithmic questions. --- 1. Queue switching decision problem You are standing in a sin...
Coding & Algorithms
17
0
156 people solved
Oct 14, 2025
Medium
Data ScientistDecide content volume and price under uncertainty
How would you decide how many shows to produce and what subscription price to set for an online-content startup? Lay out: a) an optimization objective...
Analytics & Experimentation
9
0
68 people solved
Oct 13, 2025
Medium
Data Scientist LockedCompute precision under noisy annotators
This question evaluates understanding of statistical performance metrics and label-noise propagation by requiring computation of precision, recall, an...
Statistics & Math
8
0
113 people solved
Oct 13, 2025