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
Hard
Software EngineerSenior+Plan a Safe Repository-Wide Identifier Migration
Plan a Safe Repository-Wide Identifier Migration You have a very large repository whose internal variables and function names use snake case. A conver...
Software Engineering Fundamentals
4
0
28 people solved
Apr 16, 2026
Medium
Software EngineerDesign a content moderation platform
Design a large-scale content moderation system for a short-video platform. Users can upload videos, captions, comments, audio, and other metadata. The...
ML System Design
10
0
72 people solved
Feb 18, 2026
Hard
Software EngineerInternReturn all valid word-break sentences
Given a string s and a dictionary of strings wordDict, insert spaces into s to form a sentence such that every token is in wordDict. Return all possib...
Coding & Algorithms
12
0
216 people solved
Jan 15, 2026
Medium
Frontend EngineerDesign a Photo Album App
Design a web-based photo album application for the browser (a frontend-focused system design). The product has three main screens, each provided to yo...
System Design
8
0
143 people solved
Apr 5, 2026
Medium
Software EngineerDesign a supermarket checkout system
Design the software for a supermarket checkout system. A grocery store has multiple checkout lanes operated by cashiers, and the design should also be...
System Design
18
0
158 people solved
Jan 6, 2026
Medium
Data ScientistEvaluate Smart Wait Launch Impact
A ride-hailing or autonomous-vehicle product launches a feature called Smart Wait. Before a user confirms a ride, Smart Wait shows a more conservative...
Analytics & Experimentation
10
0
114 people solved
Mar 7, 2026
Hard
Software EngineerDesign sequential reveal classification and policy
FashionMNIST: Row-wise Reveal Evaluation, Reward-Optimal Masking, Augmentation, and Early Exit Context You have a trained CNN classifier for FashionMN...
ML System Design
42
0
367 people solved
Sep 6, 2025
Medium
Software EngineerDesign an OpenAI chatbot in two hours
Design and Build a Minimal Conversational Chatbot (2-Hour Coding Exercise) You are given an OpenAI API key and two hours. Design and implement a minim...
ML System Design
31
0
446 people solved
Sep 6, 2025
Medium
Software Engineer LockedExplain C++ References, Pointers, Virtual Methods, and Overrides
Prepare for a Zoox software engineering interview question about explain c++ references, pointers, virtual methods, and overrides. The prompt highligh...
Software Engineering Fundamentals
5
0
36 people solved
May 7, 2026
Hard
Backend EngineerIntern LockedExplain Backend Fundamentals and AI Tooling
This question evaluates understanding of core backend and AI tooling topics including operating system concepts (processes vs threads), networking (TC...
Software Engineering Fundamentals
5
0
51 people solved
May 31, 2026
Medium
Software Engineer LockedDesign a Neighborhood Newsfeed System
This question evaluates a candidate's ability to design a scalable, privacy-preserving neighborhood social feed system, testing competencies in distri...
System Design
3
0
69 people solved
May 31, 2026
Easy
Data EngineerInternDescribe ETL and pipeline challenges
Question You are interviewing for a Data Engineer co-op / intern role at RBC (Royal Bank of Canada). The technical screen is a set of resume-based and...
Behavioral & Leadership
15
0
127 people solved
Jan 14, 2026
Medium
Software EngineerSenior+Design a Global Calendar Service
Design a calendar system for users in multiple time zones. The system should support: - creating, updating, deleting, and viewing calendar events - on...
System Design
10
0
111 people solved
Feb 16, 2026
Hard
Software EngineerBuild a Reliable Streaming Chat UI
You are building a React-based chat interface where assistant responses stream into the UI token by token in real time (the same UX as a typical LLM c...
Software Engineering Fundamentals
16
0
184 people solved
Apr 4, 2026
Medium
Software EngineerSenior+ LockedDesign a global real-time notification system
This question evaluates competency in designing large-scale distributed systems for global real-time notifications, covering scalability, multi-region...
System Design
19
0
212 people solved
Jan 12, 2026
Medium
Software Engineer LockedImplement an In-Memory File System
This question evaluates understanding of file-system abstractions, tree-based data structures, path parsing, and stateful directory and file managemen...
Coding & Algorithms
1
1
22 people solved
May 30, 2026
Hard
Software EngineerSenior+How do you conduct a code review exercise?
In a live interview, you are shown a short code change — a diff, a pull request, or a standalone function — and asked to produce written code review c...
Software Engineering Fundamentals
22
0
401 people solved
Jan 19, 2026
Easy
Machine Learning Engineer LockedDesign an ML Platform Portal
This question evaluates design and engineering skills for building an end-to-end machine learning platform, including experiment tracking, model regis...
ML System Design
8
0
85 people solved
Feb 23, 2026
Medium
Data ScientistCritique a CNN-Based Bridge Safety Proposal
A proposed project collects bridge drawings from Wikipedia, trains a CNN to predict whether a bridge will collapse within the first X years after cons...
Machine Learning
0
0
6 people solved
May 17, 2026
Medium
Machine Learning EngineerDesign a Real-Time Sensor Intelligence System
Design an end-to-end real-time sensor intelligence system for a product team. Start from ambiguous product requirements and cover the full lifecycle: ...
ML System Design
9
0
125 people solved
Apr 13, 2026