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."
Answer Staff-level leadership scenarios using STAR
Behavioral prompts (Staff/L6) Provide structured answers (e.g., STAR) for scenarios like: 1. Most important technical decision you drove: how you deci...
Support Dynamic Range Sums
Implement a data structure over an integer array nums. Part 1: If the array never changes, support sumRange(left, right) that returns the sum of eleme...
Explain ROC-AUC vs PR-AUC tradeoffs
Question You trained a binary classifier that outputs predicted probabilities. Compare ROC-AUC and PR-AUC (the latter usually reported as Average Prec...
How should you renew or replace a show?
You are a data scientist at a streaming company similar to Netflix or Hulu. Your team helps decide whether existing series should be renewed or cancel...
How should you handle misaligned interviews?
A backend engineer prepared for a coding interview after the recruiter explicitly said the round would assess concurrency. The candidate chose Java as...
Implement FizzBuzz
Implement the classic FizzBuzz problem. Given a positive integer n, return the sequence from 1 to n as strings with the following rules: - If a number...
Design a collaborative spreadsheet
Design an online spreadsheet service similar to Google Sheets. Users can open the same workbook concurrently and directly edit cells, formulas, rows, ...
Implement Rate-Limited Wikipedia Crawler
Implement a rate-limited Wikipedia crawler. You may use an AI coding assistant during the interview, such as Cursor or Claude Code. You are expected t...
Optimize a core kernel for throughput
You are given a mocked “core kernel” function (similar in spirit to a GPU kernel / tight compute loop) that is functionally correct but slow. Task - O...
Design a ride-sharing system (Uber)
Design a large-scale ride-sharing platform similar to Uber. Cover: - Rider and driver apps (account, availability, requesting rides). - Real-time driv...
Choose models for trading tasks
You are given several modeling options for quantitative trading or pricing work: linear regression, convolutional neural networks, transformers, and r...
How do you explain work to non-technical partners?
Behavioral questions 1. Communicating with non-technical people: How do you explain a complex technical/ML topic to a non-technical stakeholder (e.g.,...
Implement stack variants and path-sum check
Coding tasks Solve the following algorithmic problems. 1) MinStack Design a stack supporting: - push(x), pop(), top() - getMin() returning the minimum...
Compute max planes shot and session count
Problem 1: Max planes you can shoot before any lands You are given two equal-length arrays: - altitude[i]: the initial altitude of plane i (positive i...
Predict output when iterating ordered keys
Assume you have a data structure global_var[a][time] that behaves like an ordered map: - Keys (time) are kept in sorted ascending order. - order(map, ...
Count Trips From Vehicle Logs
You are given a text log of vehicle events on a road system. Each log record contains: - license_plate: a string identifying a vehicle - event_type: o...
Describe Learning, Conflict, and Mistakes
You are interviewing for a Data Scientist role. Answer the following behavioral questions using specific examples from work, research, or internships:...
Compare Data Infrastructure Storage Choices
You are designing data infrastructure for an autonomous-driving company. Discuss the following storage and processing concepts and trade-offs: 1. In P...
Design a temporary email service
Design a Disposable Email Service with Auto-Expiring Addresses Design a receive-only disposable email service (e.g., 10‑minute inboxes) that issues au...
Design a delivery cost dashboard with payments
Design a delivery cost dashboard with payments Object-Oriented Delivery Cost Dashboard Service Goal Design and implement an object-oriented service to...