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."
Design a CI/CD system with stuck-job handling
Scenario Design a CI/CD platform similar to GitHub Actions/Jenkins that: - Triggers pipelines on events (e.g., push/PR/merge). - Runs pipelines as a D...
Write SQL using joins and window functions
SQL Coding: Rank within Groups with Joins You are given two tables: accounts - account_id (string) - customer_id (string) - segment (string) — e.g., "...
Design cart management lifecycle service
Scenario You are designing the backend for an on-demand delivery app (restaurants and grocery). Users can create a cart, modify items from multiple de...
How do you design an A/B experiment?
You have an interview on your agenda titled “Experiment Design.” You are asked to design an online experiment (A/B test) for a product change. Describ...
Scale a Distributed Randomized Multiset
After designing the randomized multiset on a single machine, explain how you would scale it across multiple servers. The distributed system should sup...
Identify the CSS color function
In CSS, which color function accepts red, green, and blue channel values and can also include an optional opacity value?
Process Sharded Login Logs
You are given user login event logs generated by many servers across multiple regions. The logs are sharded by server or region, so no single machine ...
Design Product Page View Tracking
Design a view-tracking system for a large e-commerce product detail page. When a shopper opens a product page on web or mobile, the system should reco...
Design Pricing Model Experiment
You work as a data scientist for a ride-hailing marketplace. The company wants to launch a new pricing model that may change the price shown to riders...
Model other agents in simulation
Scenario You are building a driving simulation environment for training/evaluating an autonomous agent (planning or RL). Besides the ego vehicle, the ...
Design Sliding-Window Average Tracker
Design a class that tracks records in a sliding time window. Implement the following API: - init(time_window): initialize the object with a window siz...
Determine identical files ignoring metadata
Question How would you determine whether two files contain identical bytes while ignoring all filesystem metadata? Propose and justify a hashing-based...
Design a group chat system
Design a WhatsApp-like group chat system. Core features: - 1:1 and group conversations - Send/receive text messages (assume small payloads) - Group me...
Implement Sorted Search and Array Updates
Implement the following independent array functions. Part 1: Search a sorted array Given a sorted array of integers nums in nondecreasing order and an...
Design a Product or Video Recommendation System
Design a recommendation system for a large consumer platform. The platform may recommend either products in an e-commerce feed or videos in a media fe...
How would you design delay and watchlist models?
You may be asked one or both of the following machine-learning case questions: 1. Flight-delay prediction case An airline wants a model that predicts ...
How do you lead under risk and uncertainty?
Answer the following engineering leadership questions (EM/Senior level). Use specific examples. 1. Tell me about a time you rejected a technically exc...
Implement 2048 tilt move
Problem: Implement a 2048 “tilt” (move) operation You are given a 4×4 board for the game 2048. Each cell contains either 0 (empty) or a power of two (...
Solve linked list, grid BFS, and median queries
You are given three separate algorithmic tasks. 1) Reorder a linked list by odd/even positions Given the head of a singly linked list, reorder the nod...
Design centralized log ingestion and query system
Problem Design a system to collect, transmit, store, and query application/data logs from many services/hosts into a central data center database. Req...