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."
Design Travel Page Data APIs
A travel advisory company is launching a customer-facing product experience for browsing and requesting travel services. You are given mockups for thr...
Design in-memory DB with TTL and history
In-Memory Database: Progressive Design in 4 Levels You are designing a simplified in-memory database to be implemented in four progressive levels. Eac...
Implement a simplified grep with extensible flags
Problem Implement a simplified version of grep that searches a text file and returns the lines that match a given query string. You should focus on cl...
Explain VPCs and private/public network connectivity
What is a VPC (Virtual Private Cloud)? Explain the difference between a private network and a public network/subnet. How do private subnets connect to...
Compare processes and threads in Linux and Python
Explain the differences between a process and a thread in Linux. Then explain how Python differs (e.g., the GIL), and when you would use Python thread...
Design an ads retrieval service using a heap
Object-Oriented Design: Ads Retrieval (Priority-Based) Design a component that manages ads and supports retrieving the “best” ads based on a score. Re...
Implement Factorial and Squares
Question In a live coding interview, write two Python functions and be ready to discuss their behavior. 1. factorial(n): Given a non-negative integer ...
How do you manage performance and disagreements?
Manager behavioral prompts Answer the following as a people manager (or manager-level tech lead). Use real examples where possible. 1. Scope and owner...
Design a highly reliable account balance system
Scenario You are designing a backend service that stores and updates user account balances (like a wallet/bank ledger). The system must be highly reli...
Design evaluation when A/B test is impossible
Scenario You want to evaluate whether a product or model change (e.g., a new ranking strategy, pricing rule, or UI change) improves business outcomes....
Design a hotel search and booking system
Assume you are asked to design a hotel search and booking service that runs inside a larger platform (similar to an online travel agency). Requirement...
Design in-memory delivery billing core APIs
You are asked to design an in-memory billing service for a food-delivery platform. The focus is on data structures and API behavior; you may ignore pe...
Design an appointment scheduling system
Design an appointment scheduling system for a clinic or similar business. The system should support viewing availability, creating appointments, accep...
Find kth element and sliding-window kth in stream
You are given two related tasks. Task 1: Kth element in an array Given an integer array nums of length n and an integer k (1-indexed), return the k-th...
Design a Twitter-like microblogging platform
Design a Twitter-like Platform Core interactions 1. Create/delete tweets 2. View your own tweets 3. View tweets for a given account 4. Follow other ac...
Debug a slow concurrent network server under load
Scenario You are on-call for a high-throughput network service (e.g., a TCP/HTTP server). Under load, users report: - Throughput suddenly drops - p99 ...
Scale a file-crawling API using async jobs
You implemented a synchronous API that lists all files under a directory (recursive crawl). Now you need to scale it. Part A — Scaling discussion (no ...
Explain bias–variance, overfitting, and vanishing gradients
Answer the following ML fundamentals questions: 1. Bias–variance tradeoff: What are bias and variance? How do they relate to underfitting/overfitting?...
Find an Exit in a URL Maze
You are given a starting URL for a web-based maze. Each URL represents one room in the maze. Your task is to write a program that discovers whether th...
Implement an Arithmetic Expression Evaluator
Implement an arithmetic expression evaluator. Part 1: Given a string expression containing non-negative integers, spaces, and the operators '+', '-', ...