Interview Questions
Practice the exact questions companies are asking right now.
"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 a crash-resilient LRU cache
Implement an LRU-based memoization helper with behavior similar to a standard Python LRU cache. You are given an interface like this: `python class LR...
Minimize deaths in spreading plant infection
You are given an m x n grid representing a garden: - 0: empty cell - 1: healthy plant - 2: infected plant The garden evolves day by day in the followi...
Determine Exact Layover Booking
You are given a layover duration target_hours and a list of experience durations durations, such as [2.0, 3.6], where each number represents the numbe...
Find Minimum Rooms Needed
You are given a list of meeting intervals, where each interval is represented as [start, end) and start < end. Two meetings conflict if their time ran...
Convert State Stream to Events
You are given an array states where states[i] is the categorical output of a monitoring function at timestamp i. Consecutive equal values belong to th...
Schedule Ready Tasks by Deadline
You are building a workflow scheduler. Each task has: - a unique task_id - an integer deadline - an optional list of prerequisite tasks that must be c...
Find Earliest Fully Connected Time
You are given n people labeled 0 to n - 1 and a list of friendship logs. Each log has the form (timestamp, personA, personB, action), where action is ...
Implement a Parallel Image Processor
You are building a batch image-processing utility. Implement a function that receives a list of jobs. Each job contains: - input_path: the source imag...
Solve 12 coding interview problems
Below are multiple independent coding problems. --- Problem 1: Reduce an integer to 0 with \(\pm 2^i\) You are given a positive integer \(n\). In one ...
Design a Hosted Notebook Platform
Design a hosted notebook platform for interactive code execution, similar to a cloud-based notebook service. The system must support 500,000 concurren...
Improve classifier with noisy multi-annotator labels
Problem You are given a text dataset for a binary classification task (label in \{0,1\}). Each example has been labeled by multiple human annotators, ...
Solve Two Array Optimization Problems
This online assessment included two coding problems. Problem 1: Maximize protected city population You are given: - an integer n - an array population...
Design a coffee ordering system
System Design: Coffee Ordering System Design a system for a coffee shop (or chain) that supports ordering drinks. Core use cases - Customer browses me...
Explain Logistic Regression, Backprop, and Adam
Answer the following machine learning fundamentals questions: 1. Logistic regression - Explain how logistic regression works for binary classificat...
Design a restaurant waitlist system
You are implementing the waitlist system for a restaurant. Parties arrive over time, can cancel, and get seated when a table becomes available. Rules ...
Can board states be transformed?
You are given two strings, start and target, of equal length representing a one-dimensional board. Each character is one of: - L: a piece that may mov...
How to stream a large file to 1000 hosts fastest
Problem You need to distribute a very large file stored in cloud object storage to 1000 servers in a data center. - The WAN link from cloud storage → ...
Compute Infection Time in a Grid
You are given an m x n grid where each cell is one of the following: - 0: empty - 1: healthy - 2: infected Every minute, each infected cell spreads th...
Design an ad frequency capping system
Design a real-time ad frequency capping system for an ads platform. When the ad server is deciding whether to show an ad, it must enforce caps such as...
Design a sandboxed cloud IDE
System design: Sandboxed cloud IDE (Colab-like) Design a multi-tenant, browser-based cloud IDE/notebook that lets users run code in an isolated sandbo...