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."
How would you measure product success?
You are interviewing for a Data Scientist role supporting a subscription-based collaborative design software product used by teams. The product is sol...
Calculate Transaction Fees
You are building a payment processor. Each transaction has an amount in cents, a payment type, and a payment status. The platform charges a percentage...
Solve probability and expectation problems
You are asked to solve the following probability and mathematical interview problems: 1. Squid Game glass bridge: There are B sequential bridge steps....
Rearrange Tasks With Cooldown
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Implement a Snowflake Query Client
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Print the File System State
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Exception Handling in a RESTful Service with @ControllerAdvice
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First Non-Repeating Character in a String
First Non-Repeating Character in a String Given a string s, find the first character that appears exactly once when scanning the string from left to r...
Resolve conflict across teams
Describe a time when you had to coordinate between two teams that were in conflict or seriously misaligned. What caused the disagreement, how did you ...
Design Harmful Content Detection
Design an end-to-end machine learning system to detect harmful user-generated content on a large online platform. Assume the platform accepts text and...
Design a Rental Marketplace Backend
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Design load balancing, caching, and idempotent APIs
You are designing a backend service that will be deployed across multiple instances behind a load balancer. Answer the following: 1) Load balancing - ...
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...
Design a ChatGPT-like serving system
Design a ChatGPT-like system for inference serving. Your design discussion should cover: 1. High-level architecture for chat completion (request routi...
Analyze vision model failures
For a computer vision product, discuss the following: 1. Explain the core machine learning fundamentals that matter most in vision work, including bia...
Explain dataset size, generalization, and U-Net skips
You are interviewing for an ML Engineer role in an image/video team. Answer the following conceptual questions clearly and concisely. 1) Small vs. lar...
Remove duplicates and find constrained longest subsequence
You are given two independent coding tasks. Task 1: Remove duplicates from a linked list Given the head of a singly linked list (not necessarily sorte...
Design RL reward for speed limits
RL for Autonomous Driving — Conceptual + Practical You are training a reinforcement-learning agent to drive a vehicle. The interview moves from policy...
Compute transfers to balance account debts
Problem: Balance accounts by generating transfers You are given a dictionary/map balances from accountId -> netBalance. - A positive balance means the...
How to Identify Best Battery Group
You have historical quality data for batteries that were randomly assigned to one of 5 groups. Each battery then goes through 3 different quality test...