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."
Count Trips From Vehicle Logs
You are given a text log of vehicle events on a road system. Each log record contains: - license_plate: a string identifying a vehicle - event_type: o...
Design a delivery cost dashboard with payments
Design a delivery cost dashboard with payments Object-Oriented Delivery Cost Dashboard Service Goal Design and implement an object-oriented service to...
How predict vehicles’ turn direction at intersection?
At an intersection, there are N vehicles stopped or moving slowly. For each vehicle you have historical time-series data up to the current time: - Pos...
Design a scalable, reliable system
System Design: Global Photo/Video File Storage and Sharing ("CloudDrive") Context Design a scalable, highly reliable consumer service where users uplo...
Present a project deep dive
Behavioral: End-to-End Project Deep Dive (Concise Slide Deck) In the project deep-dive round, the interviewer asks you to present one significant proj...
Design a multi-tenant CI/CD platform
Question Design a multi-tenant CI/CD system that runs pipelines triggered by Git activity, isolates tenants from one another, and scales to thousands ...
Design autocomplete with Trie
Design and implement an autocomplete service backed by a prefix tree (Trie). The service stores a dynamic dictionary of words, each carrying an intege...
Parse and build binary data in Python
Using provided interfaces ByteReader(read(n), read_uint32_le, read_string) and ByteWriter(write(b), write_uint32_le, write_string), implement function...
Merge two sorted arrays in-place
You are given two integer arrays sorted in non-decreasing order, and two integers m and n: - nums1 has length m + n. The first m elements of nums1 con...
Explain reliability and runtime fundamentals
You may be asked several short technical-fundamentals questions such as: - In a Kafka-based batch consumer, how would you prevent a batch from being p...
Design a grounded voice assistant
You are designing a voice assistant response system similar to Siri. The assistant uses a large language model together with external tools or APIs to...
Implement robust one/two-sided p-value function
Implement p_value(stat, alternative, dist, df=None) Context: You're building a small, production-quality helper to compute p-values for common one- an...
Find linked user records by similarity
You are given a list of user records. Each record has the following fields: - id (integer, unique) - name (string) - email (string) - company (string)...
Find minimum reversals to orient edges away from root
You are given a connected graph with n nodes labeled 0..n-1 and n-1 directed edges. If you ignore edge directions, the edges form a tree. Each directe...
Describe a challenging project
Behavioral Question Describe one project you worked on that was particularly challenging. Please cover: - Context: What was the goal and your role/own...
Solve the N-Queens problem
Problem Given an integer n, place n queens on an n × n chessboard so that no two queens attack each other (i.e., no two queens share the same row, col...
Design a search-to-ads ranking pipeline
Prompt Design a high-level search + ads ranking system for an app where a user issues a query and the product shows a mix of organic search results an...
Design a simple API rate limiter
Design a rate limiter for an API. Scenario You operate an HTTP API (e.g., /v1/*). You need to prevent abuse by limiting request rates. Requirements (c...
Design a real-time recommendation system
You are asked to design a real-time recommendation system for a large-scale consumer product (for example, recommending items or content to users in a...
Compute exclusive CPU time from nested logs
You are given logs from a single-threaded CPU that runs n functions (IDs 0 to n-1). Each log entry is a string in the format: - "functionId:start:time...