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 a video-on-demand streaming service
Scenario Design a large-scale video-on-demand (VOD) streaming service similar to a major streaming platform. Users should be able to: - Sign in and br...
Design a shopping cart with coupons and tax
Design an object-oriented shopping cart module for an e-commerce system. Requirements: - A cart can add items and update item quantities. - The cart s...
Design an online auction system
Design a scalable online auction service. Users can: - Create an auction (item info, start/end time, reserve price optional). - Place bids while the a...
Minimum Character Changes to Make Every k-Length Block a Palindrome
Minimum Character Changes to Make Every k-Length Block a Palindrome You are given a password string and an integer k. The length of password is guaran...
Implement KV cache for inference
Design Task: Key–Value Cache for Transformer Decoder Inference Context You are building an autoregressive inference engine for a Transformer decoder-o...
Design and operate a monolith on Kubernetes
Design and Operate a Monolith on Kubernetes Context You are joining an infrastructure team. The backend is a single monolithic service. The company is...
Answer general behavioral questions
Behavioral Interview Prompts (Software Engineer — Technical Screen) To prepare concise, high-impact answers, use STAR/CAR (Situation–Task–Action–Resul...
Design a scalable real-time chat system
System Design: Real-Time Chat (1:1 and Groups) Context Design a mobile-first, globally available real-time chat system that supports both 1:1 and grou...
Implement a robust Python generator
Given a list of integers, write a Python generator that yields the integers from the list while handling edge cases such as None values, empty input, ...
Design a key-value store
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Debug using logs and allocate tasks
You inherit a service where unit tests pass locally, but production logs show intermittent errors. Without a debugger, outline a step-by-step debuggin...
Set up a Python LLM dev environment
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Explain Shell Script for Python Virtual Environment Setup
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Prioritize Tasks and Respond to Coworker Concerns
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Determine Channel Performance with Additional Metrics Needed
Determine Channel Performance with Additional Metrics Needed Compute Expected Purchases and Revenue by Channel Context A company sells a product throu...
Solve two interview coding problems
This interview included two coding tasks: 1. Currency conversion graph You are given a set of directed currency exchange rates, for example: - C...
Design a URL Shortening Service
Design a production-ready URL shortening service. The system should: - Accept a long URL and return a short, unique alias. - Redirect a short URL to t...
Implement AUC-ROC, softmax, and logistic regression
You are asked to implement a few core ML building blocks from scratch (no ML libraries such as scikit-learn). You may use basic numeric operations and...
Design a parking lot system
Design a parking lot system (software + core components) that supports multiple entry/exit gates, different spot types, ticketing, and payment. Functi...
Explain FlashAttention, KV cache, and RoPE
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