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."
Explain production model drop to a PM
Role Play: Communicate Model Degradation to a Non-Technical PM You are a data scientist. A PM says: > “Your model performed great on the validation se...
Design a flexible expense reimbursement system
System Design: Expense Reimbursement with Pluggable Rules and Group Constraints Context Design an enterprise expense reimbursement platform where admi...
Build and design a Mistral RAG agent
Design and Implement a Minimal LLM-Powered RAG Agent (Python, Mistral API) Context You are asked to build a minimal, but production-minded, retrieval-...
Design product catalog service
Design product catalog service Design a product catalog service for a large e-commerce / grocery platform. The catalog must support a hierarchical cat...
Hiring Manager Behavioral Round: Project Impact, Influence, Communication, and Setbacks
Hiring Manager Behavioral Round: Project Impact, Influence, Communication, and Setbacks This is a hiring-manager video round centered on your project ...
Introduce yourself and explain why Bloomberg
Behavioral questions 1. Self-introduction / resume walkthrough - Give a 1–2 minute overview of your background. - Highlight 1–2 projects you’ve ...
Introduce yourself for a senior role
Prompt You’re interviewing for a senior engineering role. 1. Give a concise self-introduction (2–3 minutes). 2. Highlight 1–2 impactful projects, your...
Answer range queries for alternating parity subarrays
Problem You are given an integer array nums of length n and q queries. Each query is a pair [l, r] (0-indexed, inclusive). A subarray nums[l..r] is ca...
Solve theatre seating and ticker extraction
Implement the following two coding tasks. 1. Allocate groups in a movie theater You are given an integer n representing the number of rows in a movie ...
Hiring-Manager Round: Project Ownership, Influence, Communication, and Setbacks
This is the hiring-manager video round for a data/software engineering role. The interviewer opens by asking you to walk through a recent project you ...
Design a hybrid-cloud GPU allocation service
System Design: Hybrid-Cloud GPU Resource Allocation & Job Management Design a service that allocates and manages GPU resources for ML training jobs in...
Compute max planes shot and session count
Problem 1: Max planes you can shoot before any lands You are given two equal-length arrays: - altitude[i]: the initial altitude of plane i (positive i...
Count Connected Components in an Undirected Graph
You are given n nodes labeled from 0 to n - 1 and a list of undirected edges. Each edge is represented as a pair [u, v], meaning there is an undirecte...
Answer conceptual true/false and caching questions
You are asked several quick technical screening questions. Answer each with Yes/No and provide a brief justification. 1. (Integer representation) “64-...
Solve remembered OA coding tasks
The online assessment reportedly had five coding questions, but only the following three were described clearly enough to reconstruct: 1. Find the top...
Design and analyze a switchback experiment
Design and Analyze a Switchback Experiment: Reducing Cold-Food Incidents for Bike Couriers You are a data scientist on a delivery-marketplace team. A ...
Describe influencing without authority
Behavioral (STAR) Prompt: Disagreeing With a Senior Engineer's Design Without Authority Context You are interviewing for a Data Scientist role in an o...
Validate whether a binary string is good
You are given a binary string s consisting only of characters '0' and '1'. Define a good string recursively by the grammar: - '0' is a good string. - ...
Write SQL to analyze CA residency history
You have two SQL tables. Table 1: user_info (current snapshot) - id (user id) - shard (partition column) - name - country - state - created_date Table...
Implement a BFS web crawler
A web crawler starts from a URL and explores reachable pages level by level. You are given: - start_url: string - An interface fetch_links(url: string...