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."
Implement NumPy neural-network layers
You are given a neural-network coding task in NumPy. Let X be a batch input matrix of shape (B, d_in), W a weight matrix of shape (d_in, d_out), and b...
Build model to predict package delivery time
You are building an ML model to predict package delivery time (ETA) for shipments. Given historical shipping data (order created time, origin/destinat...
Why Use a t-Statistic?
In the context of an A/B test or a linear regression, explain why the t-statistic is a useful measure for evaluating whether an estimated effect diffe...
Design a subscription push service
Design a subscription push service Object-Oriented Design: Publish/Subscribe Notification Service Design an object-oriented publish/subscribe notifica...
Design cart and pricing engine classes
Design the core classes and interfaces for a cart & pricing engine for a food delivery marketplace (e.g., Uber Eats). This is an object-oriented / low...
Explain Runnable vs Callable and thread-safe Singleton
Concurrency & Design Patterns (Java) 1. In Java concurrency, what is the difference between Runnable and Callable? - When would you choose one over...
Define a one-way function and its uses
What is a one-way function (also called a one-direction function) in cryptography? Define it precisely and explain common uses in real systems (e.g., ...
Validate transactions with risk rules and reporting
You are building a small fraud-screening validator that reads transactions from a CSV file and outputs a human-readable report. Input 1) Transactions ...
Handle traffic spikes and estimate server capacity
Scenario You are designing and operating a backend service that receives API requests from clients. Recently, the service becomes slow or times out wh...
Implement Game Physics and Block Mining
You are given two independent coding tasks from the same interview category. Solve both. Task A: Flappy-Bird-Style Jump Boundary Function Implement a ...
When should products use AI?
A product-oriented interview asks you to discuss AI adoption in software products. Explain how you would decide whether a feature should use AI or a t...
Diagnose Transformer training and inference bugs
Debugging a Transformer That Intermittently Throws Shape/Dtype Errors and Fails to Converge You inherit a Transformer-based sequence model (decoder-on...
Design a High-Frequency Job Scheduler
Design a distributed job scheduler that supports one-time and recurring jobs, including high-frequency tasks that may run every few seconds. The syste...
Describe Product and Team Collaboration
Behavioral interviews focused on: - how you collaborate with product managers, - how you communicate and align across teams, - how you handle disagree...
Debug and mitigate a CPU spike incident
Production Debugging: CPU Spike Incident (Open-Ended) You are on-call for a backend service. An alert fires: CPU usage suddenly spikes on the service’...
Build a hit/miss word guessing game
Two players play a word guessing game. - Player A chooses a secret word. - Player B repeatedly guesses single letters. - After each guess, the game re...
Calculate win chance in three-player dice game
Probability of Winning with Rerolls on Ties Setup - Three players: A (you), B, and C. - A fair six-sided die is used. - B and C have already rolled an...
Handle payment-service outages
You own a service that computes courier payouts and then submits payout requests to a downstream payment processor. What should your system do if the ...
Evaluate Top-Dasher Program's Benefits and Challenges
Evaluate Top-Dasher Program's Benefits and Challenges Scenario DoorDash is considering several driver-facing initiatives: a Top-Dasher status, cash in...
Implement CRUD API and tests
You are given two software-engineering tasks. 1. Implement a simple REST API for a resource such as Note or Message. - Support basic CRUD operation...