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."
Design a distributed system end-to-end
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Design log queries and a buffered writer
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Reverse Words While Preserving Spaces
Implement a C++ function that reverses the order of words in a string. Assume a word is any maximal sequence of non-space characters, and the input co...
Check if each prefix forms 1..k permutation
You are given an integer array arr of length n that is a permutation of the numbers 1..n (each number appears exactly once), but in arbitrary order. F...
How to find the cheapest flight within K stops
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Implement short algorithms on logs, grids, and strings
You are given several independent short coding tasks. For each task, implement the requested function(s). Assume standard library data structures are ...
Select transactions to maximize fees under size
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Minimize operations to reduce integer to zero
You are given a non-negative integer n. In one operation: - If n is even, you may replace n with n / 2. - If n is odd, you may replace n with either n...
Walk Through One Past Project
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Design Apple News without ML
Design an initial search and content-discovery system for a news application similar to Apple News, assuming you do not have a trained ranking model y...
Write SQL for percent and window changes
Use PostgreSQL. Assume today = 2025-09-01. You must use CTEs and multiple window functions. Schema and tiny samples are below. Schema: - exposures(uni...
Design hierarchical product classification
Design an end-to-end machine learning system that classifies products into a hierarchical taxonomy such as department -> category -> subcategory. Assu...
Debug a PyTorch U-Net shape mismatch
You are given a PyTorch implementation of a U-Net-like segmentation model that should follow the original U-Net style with valid convolutions (no padd...
Respond to long-term concerns after A/B success
Your model performs well in an A/B test (statistically significant lift on the primary metric). However, your manager believes the model may harm long...
How would you answer a DS video interview?
Question You are interviewing for a Data Scientist Intern role at TransUnion. The technical screen is an asynchronous (one-way) video interview: you a...
Design Pricing Model Experiment
You work as a data scientist for a ride-hailing marketplace. The company wants to launch a new pricing model that may change the price shown to riders...
Design an Event Recommendation Engine
You are building an email marketing recommendation engine for a ticketing marketplace. The marketplace has many users and many events. The engine shou...
Explain a project’s impact and product thinking
A Head of Product asks: 1. Pick one analytics/data science project you led end-to-end. 2. What was the product problem and why did it matter? 3. What ...
Solve core probability and statistics questions
Answer the following short theory/computation questions (as in an OA multiple-choice section). Provide the key formula and a brief explanation. 1. Bay...
Solve interval merge and string dedup problems
You are given three coding questions from a phone screen. Solve each independently. 1) Merge overlapping intervals Input: A list of intervals interval...