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 market price change notifications
Design a system that notifies users when market prices change for the symbols they track. Context and requirements: - Users maintain a watchlist of sy...
Evaluate a cold-start rating launch
Uber Eats is considering showing an initial rating for newly onboarded restaurants that have little or no historical review data. This is a two-sided ...
Why pursue full-stack engineering?
You are interviewing for a full-stack software engineering role. Explain why you are specifically interested in full-stack work instead of focusing on...
How do you compute expected return for two projects?
Case: A TV studio's project & divestiture decisions under uncertainty You are the CEO of a media/streaming company. You run an existing TV show, "Anal...
Explain JS event loop and related concepts
You are interviewing for a frontend JavaScript position. Answer the following conceptual and practical questions. 1. JavaScript Event Loop, Microtasks...
Design paginated list UI and pagination API
Scenario You are building a web page that displays a list of items (e.g., posts, products, or users). The list must be paginated, and users can click ...
Describe surprising project learnings
Discuss a substantial project you worked on in depth. What was the most surprising finding during the project? What outcomes differed from your origin...
Analyze video flags and reviews with SQL
You are designing SQL queries for YouTube Trust & Safety. Use the schema and sample data below. Unless stated otherwise, treat a flag as reviewed if t...
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 ...
Explain BLS vs CLS; compute t-stats
Part A — Concepts: Define Brand Lift Study (BLS) vs Conversion Lift Study (CLS) in ads measurement. List key bias/variance sources for each (e.g., non...
Compute C/T metrics from bookings and visits
Given two tables, compute control vs treatment (C/T) metrics, apply 24‑hour attribution, and generate a daily plot. Treat “today” as 2025‑09‑01; use t...
Decide and test a 20% discount strategy
Case: Evaluate a 20% Discount Campaign Context Marketing proposes a 20% discount to boost purchases. You are asked to build the business case, design ...
Design a Dormitory Room-Assignment System (OOD)
You are asked to design the object-oriented model for a dormitory room-assignment system. You are given a set of students and a set of rooms. Each roo...
Describe conflict resolution and initiative
The behavioral round reportedly consisted of 7-8 standard questions. A polished version of the expected prompts would be: - Tell me about a time you h...
Prepare for a Senior Project Deep Dive Before Coding
Prepare for a senior screen where project deep dive and communication may matter more than an easy coding task. <details> <summary>Hint 1</summary> St...
How would you evaluate emoji reactions launch?
You work on a Messenger-like chat app (not Meta). The product team plans to ship a new feature: Emoji Reactions (a user can long-press a message for 5...
Design an in-memory TODO list API
Object-Oriented Design: TODO List Design an in-memory TODO list component that supports the following operations: - add(todo) → returns an id - delete...
Design a video recommendation system
Scenario You are designing an ML-driven video recommendation product (home feed + “up next”) for a consumer app. The interviewer focuses heavily on in...
Explain key React concepts and error handling
Frontend/React Fundamentals Questions Answer the following React and frontend engineering questions: 1. What is a Virtual DOM? 2. How does the Virtual...
Design a concurrent latency percentile tracker
Design a thread-safe LatencyTracker class that supports: 1. Recording samples - Input: timestamp (e.g., epoch millis) and latencyMs (integer millis...