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."
Write queries to compute salary and budget stats
You are given the following interview tasks. Write solutions in SQL and/or Python (pandas) as appropriate. Task 1 — Second highest salary You have a t...
Explain GPU pipeline and execution hazards
Explain the following GPU architecture topics: 1. How a modern GPU renders a triangle from input vertices to final pixels. 2. How register read-after-...
Design an Online Coding Judge
Design a large-scale online coding practice and interview platform similar to a programming challenge website. The system should support: - browsing c...
Design Self-Dealing Detection for Marketplaces
Design a machine learning system to detect self-dealing or fake transactions in an e-commerce marketplace. In this setting, a seller may use related b...
Design an enterprise RAG agent system
Design an enterprise AI assistant for internal company knowledge. The system should answer employee questions over documents such as policies, product...
Design a distributed cron job scheduler
Design a distributed cron job scheduler System Design: Distributed Cron Job Scheduler Context You are designing a multi-tenant, internet-scale cron jo...
Implement JavaScript utility and API functions
You are given a small JavaScript coding exercise with a local dataset authors and access to the public Pokémon API. Assume authors is an array of obje...
How to evaluate lowering ETA?
Uber wants to estimate the business value of reducing ETA, where ETA is the predicted time from when a rider requests a trip until the driver arrives ...
Should a Restaurant Partner with Groupon?
You are evaluating whether a restaurant should partner with a daily-deals platform similar to Groupon. Assumptions: - The restaurant serves a certain ...
Answer Product DS HR Screen
You are preparing for a 30-minute HR screening interview for a Product Data Scientist role at Shopify. Prepare strong, structured answers to the follo...
Identify and mitigate deduplication program risks
System Design: Robust File Deduplication in the Real World Context You are designing a file deduplication tool that scans large directory trees on one...
Design in-memory trade subscription processor
You are asked to design and implement the internal logic of an in-memory trade subscription processor in C++. A simplified interface is provided: `cpp...
Implement Python feature and resolver metaprogramming
You are given a skeleton for a small Python "feature" framework. The goal is to use metaprogramming to: 1. Parse type-annotated classes into Feature o...
Investigate Falling Brand-Ad Spend
On a video ads platform, there are two ad products: - Direct Ads: optimized for immediate response. - Brand Ads: when a user clicks the video ad, they...
Find Top Creators and Login Streaks
Solve the following two interview-style tasks. Task 1: Top creators by likes You are given a list of like events for a business-facing creator platfor...
Explain Transformer and Fine-Tuning Basics
You are interviewing for an AI-focused engineering internship. Explain the following: 1. What is the difference between a transformer model and an emb...
Design an HR Document AI Platform
Design an internal AI platform for a bank's HR organization. The platform should ingest HR documents such as policies, benefits guides, onboarding man...
Design Identity-Trust A/B Test
You are interviewing for a Data Scientist role on an Identity & Trust team at a consumer product company. The team wants to launch a feature that stre...
How would you decide to cancel a TV show?
Case: Should you cancel, keep, or sell a TV series? You are the CEO of a streaming company. Your platform currently produces and distributes a scripte...
Design metrics and experiment for donation feature
Question Uber Eats is considering a new feature: when a user places an order, they can optionally add a donation (to the merchant or a merchant-select...