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...
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...
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 ...
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 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...
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...
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...
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...
Search Monster Battle Strategies
You are given two teams of monsters. Each monster has: - hp: starting health - attack: damage dealt per attack - revive_hp: if greater than 0, the mon...
Design a stock order manager
Design an order management service for stock buy and sell requests. The system does not match trades itself. Instead, it integrates with a third-party...
Explain Logistic Regression, Backprop, and Adam
Answer the following machine learning fundamentals questions: 1. Logistic regression - Explain how logistic regression works for binary classificat...
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 ...
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...
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...
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...
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, ...
Filter Bad Human Annotations
You are given a training dataset labeled by human annotators, but some annotations are low quality, inconsistent, rushed, adversarial, or simply wrong...
Build a concurrent web crawler
Implement a web crawler that starts from a given URL and visits every reachable page on the same host. You are given: - start_url: a string representi...