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."
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...
Implement an in-memory database with TTL and backup
In-Memory Database (Levels 1–4: TTL and Backup/Restore) Implement an in-memory database that stores records identified by a string key. Each record co...
Design booking and settlement systems
You may be asked one or more backend-heavy system design problems such as: 1. Design a reserved-seat ticketing platform similar to a concert or sports...
Calculate CTR and ad revenue
This interview included two SQL tasks. Task 1: Compare CTR during peak and non-peak hours You are given three tables: - ads(ad_id BIGINT, advertiser_i...
Walk Through an ML Project
Prepare a deep dive on one machine learning project you have worked on. In a 60-minute interview, explain: - the problem statement and why it mattered...
Build a Searchable Sentence Index
Design and implement an in-memory data structure for a collection of sentences. Each sentence has a unique integer id and a text body. Support the fol...
Make a Parentheses String Valid
Given a string s containing lowercase English letters and the characters '(' and ')', remove the minimum number of parentheses so that the resulting s...
Design an in-memory cloud storage system
In-Memory Cloud Storage Service (Take-home) Design and implement an in-memory cloud storage service that maps files (objects) to their metadata. The s...
Design and implement an Airbnb wallet
Design and Implement an Airbnb-Style Wallet (OOD + Runnable Code) You are asked to design and implement an in-app wallet system for a marketplace like...
Design signals across power and clock domains
Question In a SoC with two power domains A and B, design the interface for a control signal signal_1 (a registered 1-bit control such as an enable/sta...
List regularization methods and trade-offs
Question: Compare Regularization Techniques and When to Use Them Context: You are interviewing for a machine learning engineering role and are asked 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-...
Evaluate an arithmetic expression
Given a valid string expression containing non-negative integers, spaces, and the operators +, -, *, and /, return the computed result. Requirements: ...
Explain your fit and motivation
Prepare strong answers for these behavioral prompts: 1. Why do you want to work at Arm? 2. Why are you a strong fit for this role? 3. Describe a proje...
Answer Cross-Functional Workplace Prompts
Prepare answers for the following behavioral and communication prompts for a software engineering interview: 1. Why are you interested in working for ...
Optimize a small-string C++ class
You are implementing a high-performance C/C++ string type that uses a small-string optimization: short strings are stored inline in a fixed buffer, an...
Investigate marketplace metrics and experiment rollout
You are interviewing for a Senior Data Scientist role at a two-sided marketplace like Instacart, where customers place delivery orders and shoppers ch...
Explain bias-variance and evaluate a classifier
You are interviewing for an Applied Scientist internship. Answer the following ML foundations questions. 1) Bias–variance - Define bias and variance i...
Optimize Model Serving Under 200ms
A data science team gives you a trained model and asks you to deploy it as an online inference service. The requirement is that a single prediction mu...
Compute expected max/min of n die rolls
You roll a fair six-sided die n times independently. 1) Compute the expected value of the maximum roll. 2) Compute the expected value of the minimum r...