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."
Deep-dive a project architecture
Question Pick one of your recent, non-trivial projects and conduct a deep, end-to-end technical review. This is an open-ended architecture deep-dive: ...
Explain differences between Python list and tuple
In Python, what are the key differences between a list and a tuple? Cover: - Mutability and implications - Performance and memory considerations (high...
Transform clickstream with pandas sessionization
Given a pandas DataFrame events with columns [user_id:int, ts:str ISO8601 or NaT, url:str, server_log_ts:datetime], build 30-minute inactivity session...
Design navigation-safety simulation parameters and experiments
You must design a simulation-based evaluation for navigation safety of an autonomous agent. Be specific: a) Enumerate scene parameters to vary and jus...
Implement string reduction and time map
In a coding interview, you are asked to solve two algorithm problems. 1. String reduction with adjacent duplicates - Basic version: Given a string ...
Find longest subsequence of x that is a substring of y
Given two strings x and y, compute the maximum length of a string s such that: - s is a subsequence of x (can delete zero or more characters from x wi...
Design a secure trading app on AWS
Scenario Design a secure, Robinhood-like mobile/web application on AWS, with a deep dive into: 1. User profile management (account creation, authentic...
Implement a Batch Image Processor
Implement a program that applies basic image transformations to a batch of images. You are given a list of input image paths and, for each image, a se...
Design log-query stream processor
Design log-query stream processor Stream Processor: Query Registration and Log Tagging Context You are designing a streaming component that ingests a ...
Evaluate Top-Dasher Program's Benefits and Challenges
Evaluate Top-Dasher Program's Benefits and Challenges Scenario DoorDash is considering several driver-facing initiatives: a Top-Dasher status, cash in...
Implement Social Graph Snapshot Queries
You are given a read-only snapshot of a social network. The snapshot is represented as a directed graph where an edge (u, v) means user u follows user...
Design a production RAG system
Question Design a production retrieval-augmented generation (RAG) system for enterprise document QA. Walk through the end-to-end architecture and just...
How to debug an apparent D14 retention drop
Scenario A dashboard shows D14 retention (users retained on day 14 after signup/first activity). In the last week, the chart shows a sharp decline. As...
Design an in-memory cloud storage system
Design an in-memory cloud storage system In-Memory Cloud Storage: Files, Discovery, Users, and Compression Context: Design an in-memory storage librar...
Design a Hybrid Evaluation Platform
Design an evaluation platform for model outputs that supports both human evaluation and automated LLM-based evaluation. The system should: - ingest pr...
Design production-ready dedup service
System Design: Production-Ready File Deduplication Service Context Design a multi-tenant cloud service that stores files and achieves space savings vi...
Design cache for DAG-based query views
System Design: Caching Strategy for a DAG of Materialized Views Context You are designing an analytics system that computes materialized query views. ...
Plan for timed probability assessment
Timed Probability/Statistics Assessment Strategy Company: Optiver · Role: Software Engineer You are taking a timed online assessment of 30 probability...
Design task scheduler with dependencies
Design a Distributed Task Scheduling Infrastructure Context Design a distributed task scheduling and orchestration system that can run at scale, suppo...
Design multi-tab browser history and trade-offs
Design: Multi-Tab Browser History Context: Extend a single-tab browser-history component into a multi-tab manager that supports opening/closing tabs, ...