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."
Simulate round-robin package assignment to servers
You are simulating a round-robin dispatcher across m servers labeled 0..m-1. - Each server i has an initial remaining capacity cap[i] (a non-negative ...
Process exchange prints, volume checks, and client orders
You are writing a broker program that interfaces with an exchange via a stream of commands on stdin. You must process commands in order and write requ...
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...
Generate values by weighted probabilities
Weighted Random Sampling Generator (Streaming) You are given: - A list of distinct integers values. - A matching list of nonnegative probabilities (we...
Design an e-commerce recommendation system
Design an Amazon-Scale E‑Commerce Product Recommendation System Context You are designing a large-scale recommendation system that powers multiple use...
Schedule and cancel delayed payments
Question Extend an existing in-memory payment system (immediate transfers between accounts, plus a top-N spenders/payers leaderboard) with scheduled p...
Design auth, session security, and top-N users
Web App Design: Authentication, Security, and Top-N Active Users Context: Build a browser-based web application where a user signs in and the page dis...
Answer general behavioral questions
Behavioral Interview Prompts (Software Engineer — Technical Screen) To prepare concise, high-impact answers, use STAR/CAR (Situation–Task–Action–Resul...
Handle feedback, change pivots, and conflict
Question In the behavioral portion of the Meta Data Scientist screen, answer the following leadership prompts using concrete examples from your own wo...
Choose single queue vs multiple queues
Bank queue design choice A bank has 5 tellers. Two possible customer-flow designs: 1. Single queue: one common line feeding the next available teller ...
Sketch distributions and compare mean/median/mode
Sketching distributions and comparing mean, median, and mode This is a conceptual statistics question with two independent scenarios. For each, you sk...
Implement a timestamped map
Implement an in-memory timestamped map. Support these operations: - put(key, value, timestamp): store value for key at the given integer timestamp - g...
Walk through project scope, ownership, and decisions
Walk through project scope, ownership, and decisions Behavioral: Walk Through a Significant Project (Technical Screen — Software Engineer) Provide a d...
Assess Adding Bicycle Dashers
DoorDash is considering allowing bicycle couriers (bike dashers) to fulfill deliveries in a city that is currently served mostly by car/scooter dasher...
Design a Product Tagging Pipeline
Design an applied machine learning pipeline that automatically assigns standardized tags to products and seller content in a short-video commerce plat...
Estimate VRAM and compare model parallelism
You are a performance engineer reasoning about GPU memory and parallelism for a transformer-like workload whose runtime is dominated by large matrix m...
Design a short-video recommender system
ML System Design — Short-video recommendation Design an end-to-end recommendation system for a short-video feed (TikTok/Reels-style). Walk through the...
Assign meetings to rooms with delays
You are given: - An integer n (number of meeting rooms, labeled 0..n-1). - A list of m meetings meetings[i] = [start_i, end_i) with start_i < end_i. A...
How do you learn new knowledge quickly?
Behavioral questions 1. How do you learn new knowledge/technology quickly? Provide a concrete example. 2. What was the most challenging project you wo...
Design first-time Kubernetes deployment in new cloud
Scenario You need to stand up a new compute cluster on a new cloud account/subscription (greenfield). The team wants a simplified, practical plan for ...