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 nested key-value store
Design and implement a nested key–value store that supports set(path, value), get(path), and delete(path), where path is dot-delimited (e.g., "a.b.c")...
Coding & Algorithms
10
0
158 people solved
Sep 6, 2025
Medium
Software EngineerImplement a type-erased function wrapper
Implement a minimal std::function-like callable wrapper in C++ using type erasure via inheritance and a virtual call. Define a template Function<R(Arg...
Coding & Algorithms
8
0
89 people solved
Sep 6, 2025
Medium
Software Engineer LockedDesign a multi-device calendar application
This question evaluates system design competency in scalable backend architecture, data modeling for time-range queries, synchronization and conflict-...
System Design
15
0
178 people solved
Nov 9, 2025
Medium
Data ScientistHow to analyze Simpson's paradox
A marketing team wants to evaluate a new email campaign. Two email versions, A and B, were tested over two weeks in two cities: San Francisco and New ...
Analytics & Experimentation
7
0
73 people solved
Sep 5, 2025
Medium
Software EngineerDesign an OOD restaurant management system
Object-oriented design: Restaurant management system Design an object-oriented system for a dine-in restaurant that supports the following: Functional...
Software Engineering Fundamentals
10
0
97 people solved
Sep 5, 2025
Medium
Software EngineerDesign a GitHub-like user community
System design: GitHub-like user community Design the backend for a “developer community” product inspired by GitHub’s social layer. Core requirements ...
System Design
2
0
38 people solved
Sep 5, 2025
Medium
Software EngineerSenior+Determine Whether a Binary Tree Is a Valid BST
Determine Whether a Binary Tree Is a Valid BST Problem Given a binary tree, determine whether the entire tree satisfies the strict binary-search-tree ...
Coding & Algorithms
0
0
5 people solved
Apr 15, 2026
Hard
Software EngineerSenior+Solve Subarray Sum and Local Minimum
Two coding problems were reported in the same phone-screen round: 1. Count target-sum subarrays. Given an integer array nums and an integer k, return ...
Coding & Algorithms
5
0
40 people solved
Apr 15, 2026
Hard
Software Engineer LockedFind Longest Activatable Server Streak
This question evaluates array algorithm skills, specifically recognition of sliding-window or two-pointer techniques and reasoning about time and spac...
Coding & Algorithms
3
0
37 people solved
Apr 15, 2026
Medium
Machine Learning EngineerExplain challenges in training multimodal LLMs
Machine Learning discussion Answer conceptually (no code). Assume you are training or adapting a multimodal large model (e.g., text + image, or text +...
Machine Learning
9
0
64 people solved
Nov 8, 2025
Easy
Data ScientistCompute monthly signups, conversion, and YoY growth
You work at a subscription company and are given a user-level table. Table company_users - id (INT, PK) — user/customer id - signup_date (DATE) — date...
Data Manipulation (SQL/Python)
10
1
141 people solved
Nov 8, 2025
Hard
Software EngineerDesign a group chat system
Design a WhatsApp-like group chat system. Core features: - 1:1 and group conversations - Send/receive text messages (assume small payloads) - Group me...
System Design
19
0
235 people solved
Jan 19, 2026
Medium
Software Engineer LockedDesign a donation service for a 3‑day charity
This question evaluates a candidate's system design skills around building a reliable, scalable online donation service, emphasizing competencies in p...
System Design
24
0
381 people solved
Jan 18, 2026
Medium
Software EngineerSenior+Find Words in a Character Grid
Implement findWords(board, words) for a word-search game. You are given an m x n grid of lowercase English letters and a list of lowercase dictionary ...
Coding & Algorithms
0
0
7 people solved
Apr 14, 2026
Medium
Software EngineerDesign a Cross-Border Money Transfer Service
Design a cross-border money transfer service similar to a consumer remittance product. Users in one country should be able to send money to recipients...
System Design
4
0
62 people solved
Apr 14, 2026
Medium
Product ManagerHyperlink Request Flow at Facebook
End-to-End Flow: Clicking a Hyperlink in a Facebook Feature Walk through what happens end to end when a signed-in user clicks a hyperlink inside a Fac...
Product / Decision Making
14
0
50 people solved
Jul 4, 2025
Medium
Product ManagerLate but Critical Colleague
Behavioral Scenario: Late but Critical Colleague You run a recurring bi-weekly cross-functional planning or metrics review meeting. A teammate who own...
Behavioral & Leadership
7
1
63 people solved
Jul 4, 2025
Medium
Product ManagerYouTube Data Throughput Estimation
Estimation Challenge: YouTube Daily Data Streamed Estimate how much data YouTube streams to users worldwide in a typical 24-hour period. Walk through ...
Product / Decision Making
12
0
82 people solved
Jul 4, 2025
Medium
Product ManagerAmazon Fit, Motivation & Leadership Principles
Amazon Product Manager Fit, Motivation, and Leadership Principles Prepare for an Amazon Product Manager behavioral onsite focused on motivation, role ...
Behavioral & Leadership
8
0
59 people solved
Jul 4, 2025
Medium
Product ManagerFavorite App – New Feature Design
Favorite App: New Feature Design Choose a consumer app you genuinely admire and propose two new features that would improve its value. Be specific eno...
Product / Decision Making
10
0
36 people solved
Jul 4, 2025