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."
Arrange Match Results in Repeating Win-Draw-Loss Order
Arrange Match Results in Repeating Win-Draw-Loss Order You are given a string containing only W, D, and L. Rearrange all characters into rounds. In ea...
Design a News Aggregation Service
Design a News Aggregation Service Design a service that ingests articles from many news sources, normalizes and groups related coverage, and lets user...
Explain Large Memory Allocation, Swap, and C++ Inline Trade-offs
In a low-level C++ interview, explain what happens when a program requests 8 GB of memory on a machine with 4 GB of RAM, and discuss the purpose and d...
Implement a Multi-Level Recipe Management Service
Implement a Multi-Level Recipe Management Service Design and implement an in-memory recipe manager. A recipe stores a name, an ordered ingredient list...
Discuss Feedback, User Needs, Influence, Deadlines, and Learning
Discuss Feedback, User Needs, Influence, Deadlines, and Learning Answer the following behavioral questions with distinct examples where possible. Make...
Design a Distributed Rate Limiter
This question evaluates a candidate's ability to design distributed systems with globally consistent state across multiple servers. It tests system de...
Design a File Searcher With Symbolic Links
Design an in-memory file-system searcher. The file-system graph contains directories, regular files, and symbolic links. A query selects regular files...
Simulate Constant-Time Random Courier Selection
Simulate Constant-Time Random Courier Selection Problem Implement simulate_random_picker(operations, random_values). The picker maintains a changing s...
Compute Edit Distance
Compute Edit Distance Given two strings, return the minimum number of single-character operations needed to transform the first string into the second...
Reduce Cold-Food Incidents with Metrics and an Insulated-Bag Experiment
Reduce Cold-Food Incidents with Metrics and an Insulated-Bag Experiment A delivery marketplace wants to reduce the support costs, credits, and refunds...
Merge Keyed N-Ary Trees
Merge Keyed N-Ary Trees An N-ary tree node contains a unique string key among its siblings and a list of children. Implement merge_trees(a, b) for two...
Merge Overlapping Intervals
Merge Overlapping Intervals Implement merge_intervals(intervals) for a list of closed integer intervals. Each interval is [start, end] with start <= e...
Plan Eviction and Cleanup for a Production Cache
Plan Eviction and Cleanup for a Production Cache A process-local timed cache is correct for basic puts and gets, but it can still exhaust memory, reta...
Implement 1NN with NumPy
This question evaluates implementing a 1-nearest-neighbor classifier with NumPy, testing skills in vectorized numerical computation, distance metrics,...
Design Comments for a Collaborative Whiteboard
Design Comments for a Collaborative Whiteboard Design comments for a real-time collaborative whiteboard. The product details below are practice assump...
Model Effective-Dated Compliance Restrictions for Securities
Model Effective-Dated Compliance Restrictions for Securities Design a relational system that maps compliance restrictions to every affected security. ...
Evaluate Dependent Variable Assignments
Evaluate Dependent Variable Assignments Problem Implement evaluate_assignments(expressions). Each input string assigns one variable to a sum of intege...
Find Each User's Earliest Seven-Day Activity Streak
Find Each User's Earliest Seven-Day Activity Streak Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables. Schema...
Design Direct File Uploads for a Chat Application
Design Direct File Uploads for a Chat Application Design file uploads for an existing chat application. Clients should upload file bytes directly to a...
Traverse All Reachable Pages With Parallel BFS
Problem A collection of web pages is modeled as a directed graph. graph[page] lists the pages linked from page in a stable order. Implement reachable_...