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 rate limiter
Design a rate limiting system for an API gateway. Your design should address: - Rate limits such as "N requests per second/minute" per key (e.g., per ...
Simulate Monster Team Battles
Design and implement a battle simulator. Data model: - Team: a team name and an ordered list of monsters. - Monster: a monster name, a type, current h...
Can All Courses Be Completed?
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Evaluate Piecewise Linear Function
Given a list of 2D points [(x1, y1), (x2, y2), ..., (xn, yn)], where the points are ordered by strictly increasing x, connect each consecutive pair of...
Design config rollout and click aggregation
The system design rounds included two prompts: 1. Global configuration deployment - Design a system that allows engineers to publish configuration ...
Explain linear regression and Transformer fundamentals
Answer the following conceptual questions: Part A — Linear Regression 1) What objective does linear regression optimize, and what is the closed-form s...
Design a multi-channel notification system
Design a notification system that receives alert events from other internal systems and notifies all subscribed users through multiple channels (e.g.,...
Design and Evaluate a Home Carousel
Pinterest is considering adding a horizontally scrollable carousel at the top of the Home feed, similar to Instagram Stories. The carousel may surface...
How would you optimize large-scale training/inference?
You’re discussing your experience with large-scale model training and inference on GPUs. The interviewer wants you to proactively cover optimization t...
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 LinkedIn Learning course recommendations
Design a mini ML system to recommend LinkedIn Learning courses to a user. Product goal: - Recommend courses that help the user succeed in their job se...
Implement a Connection Pool
You are given an existing DBConnection class that simulates a physical database connection. It exposes the following methods and must not be modified:...
Design an in-memory hotel booking system
Design a hotel booking system that supports reservations without using any database. You may only use in-memory data structures. Requirements Define A...
Solve chat, grid paths, and car rentals
You are given three independent programming tasks. For each, describe and implement an efficient algorithm, and be prepared to analyze its time and sp...
Solve tree and DP problems
This coding round contained two algorithm questions: 1. Deepest shared ancestor in a binary tree You are given the root of a binary tree and two ...
Design synchronization for water molecule assembly
Concurrency: Build H2O from concurrent H and O actions Context You are given two kinds of threads that repeatedly call the following functions: - hydr...
Identify and mitigate deduplication program risks
System Design: Robust File Deduplication in the Real World Context You are designing a file deduplication tool that scans large directory trees on one...
Decide and experiment on Group Call feature
Assume today is 2025-09-01. You have only one table, calls_daily_agg(date, user_id, country, device_tier, one_to_one_calls_started, one_to_one_call_du...
Design and diagnose a regression pipeline
CLV_90 Prediction Pipeline under Zero-Inflation, Heavy Tails, and Multicollinearity Context You need to predict 90-day customer value (CLV_90) at the ...
Calculate valid daily usage with gap constraints
Write Standard SQL to compute, for a given date (use 2025-09-01), each user's total valid usage minutes. Schema and rules: Schema (timestamps are UTC)...