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 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...
Find maximum value in huge text file
You are given the path to a very large text file on disk. The file has the following properties: - Each line contains exactly one signed 64-bit intege...
Design a blob storage system for lunar environment
You are asked to design a blob storage system deployed on a lunar base. The interviewer is intentionally making the environment unusual (the Moon) to ...
Describe conflict and failure using STAR framework
You are in a behavioral interview for a software/ML engineering role. The interviewer asks you to: 1. Describe a time you faced a significant conflict...
Design a Secure Medical Audio Pipeline
You are reviewing a backend service for a healthcare application. The service accepts a medical audio recording, converts it to text, sends the transc...
Assemble DNA payload strings from tagged fragments
You are given a list of DNA-like fragments. Each fragment is a tuple: - start_tag: string - end_tag: string - payload: string A valid DNA chain is for...
Design notification and feed recommenders
Design two recommendation systems for a large visual-discovery platform: 1. Notification recommendation system: Decide whether to send a notification ...
Implement minimal RLE encode/decode with max run K
You are given a run-length encoding (RLE) format that compresses a string by grouping consecutive repetitions of a short substring. Encoding format An...
Answer leadership and quality tradeoff questions
Answer the following behavioral questions with specific examples. 1. Describe a project you led. Why was it challenging? 2. Have you changed any hobbi...
Count closed islands in a grid
Problem You are given an m x n 2D grid representing a map after flooding: - 0 = water - 1 = land An island is a maximal 4-directionally connected comp...
Implement decoder-only GPT-style transformer
Goal Implement a simplified decoder-only Transformer language model (similar in spirit to GPT) for next-token prediction. The implementation should be...
Answer multi-round grid and data-structure questions
You are given several independent interview-style coding questions. 1) Find first/last occurrence in sorted array (+ dynamic updates follow-ups) Given...
Implement an LRU cache
Design and implement a data structure for a Least Recently Used (LRU) cache with a fixed capacity. The cache must support: - get(key): return the valu...
Implement spreadsheet cells with formulas
Design an in-memory spreadsheet that supports these operations on cells such as A1, B2, and ranges such as A1:B2: - Set(cell, value): assign an intege...
Design an ad-click aggregation and enrichment pipeline
Scenario You are designing a data platform to measure advertising performance. Mobile apps and web browsers send ad impression and ad click events. An...
Describe a Python design-and-coding approach in Colab
Python Coding-and-Design Exercise in Google Colab You are given an open-ended coding-and-design exercise to complete in Python, and the interviewer re...
Design a scheduled payment system
System Design: Scheduled Payment Service Context You are designing a backend service that allows end users to: - Schedule a payment for a future date/...
Solve four algorithmic problems
Answer the following independent algorithmic questions: 1) Count extendable prefixes for '10' subsequences: Given a binary string s and an integer k, ...
How to test account ranking change
A product team is evaluating a change to the account switcher in a multi-account app. Current experience: - When a user opens the account switcher, ac...