Interview Questions
Practice the exact questions companies are asking right now.
"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"
"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"
"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."
"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."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"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."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"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."
"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."
"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."
"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."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"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."
Find Duplicate Files with a Hand-Written Directory Traversal
Find Duplicate Files with a Hand-Written Directory Traversal Implement a duplicate-file finder starting from a root directory, but do not use a recurs...
Design GPU Scheduling for a Video Generation Platform
Design GPU scheduling for a video generation platform where requests have different durations, priorities, and capacity needs. <details> <summary>Hint...
Walk Through an Agentic PDF Evaluation Codebase
Walk through an agentic PDF evaluation codebase, including architecture, deployment, data processing, embeddings, similarity, and state management. <d...
Design a Prompt Playground
Design a Prompt Playground The source reports a full-stack Prompt Playground system-design interview covering product features, UI, architecture, and ...
Minimize Replacements So Equal Product Values Are Contiguous
Minimize Replacements So Equal Product Values Are Contiguous You are given the quality value of each product in a line. In one operation, choose two d...
Stand by a Disputed Technical Judgment
Stand by a Disputed Technical Judgment Prompt Describe a situation in which others believed your technical judgment was wrong, but you continued to ad...
Explain Large Memory Allocation, Swap, and C++ Inline Trade-offs
In a low-level C++ interview, explain what happens when a program requests 8 GB of memory on a machine with 4 GB of RAM, and discuss the purpose and d...
Design a Multi-Channel Notification System
Design a Multi-Channel Notification System Design a notification platform that accepts product events and delivers timely messages through channels su...
Design Chat Deletion Semantics Under Concurrent Sends
Design Chat Deletion Semantics Under Concurrent Sends Design the backend of a chat application that supports creating threads, sending messages, readi...
Reason About and Validate Virtual Card Transactions
Reason About and Validate Virtual Card Transactions A virtual-card transaction contains a 16-digit card_number, an 8-digit transaction_id, and an inte...
Design a Website Monitoring Service
Design a website monitoring service that checks customer websites, detects outages or high latency, and alerts users when their sites fail health chec...
Design Comments for a Collaborative Whiteboard
Design Comments for a Collaborative Whiteboard Design comments for a real-time collaborative whiteboard. The product details below are practice assump...
Design Calendar Event CRUD with Unit Tests
Design and implement a small calendar application that supports creating, editing, and deleting events. The interviewer expects unit tests and clean s...
Arrange Match Results in Repeating Win-Draw-Loss Order
Arrange Match Results in Repeating Win-Draw-Loss Order You are given a string containing only W, D, and L. Rearrange all characters into rounds. In ea...
Diagnose a Decline in Order Acceptance Rate
Diagnose a Decline in Order Acceptance Rate The order acceptance rate on a delivery marketplace has decreased. Describe how you would determine whethe...
Design and Evaluate a Refund Policy for Delayed Orders
Design and Evaluate a Refund Policy for Delayed Orders A delivery marketplace is considering automatically refunding customers whose orders are delaye...
Analyze Mission Outcomes and Allocate Response Units
Analyze Mission Outcomes and Allocate Response Units You receive historical mission-level data for a set of response units. Assume one row represents ...
Extend a Banking Interface with Scheduled Payments and Account Merges
Extend a Banking Interface with Scheduled Payments and Account Merges You maintain an in-memory banking service whose public interface already support...
Design and Implement a URL Shortening Service
Design and implement a URL shortening service in a combined whiteboarding and implementation interview where AI assistance may be allowed. <details> <...
Critique a Recent Engineering Project and Explain What You Would Redo
Critique a Recent Engineering Project and Explain What You Would Redo Choose a meaningful engineering project from roughly the last two years. Give a ...