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."
Evaluate Fresh Content and Video Experiments
Pinterest wants to improve the perceived freshness and engagement of the home feed. Answer the following interview questions: 1. Define a practical me...
Implement a rate limiter and a pub/sub API
You have two coding/design (low-level design) tasks. 1) Rate limiter Design and implement a rate limiter with an API like: - boolean allow(String clie...
Explain bias–variance, overfitting, and vanishing gradients
Answer the following ML fundamentals questions: 1. Bias–variance tradeoff: What are bias and variance? How do they relate to underfitting/overfitting?...
Join Tables and Rank Users
You are given two analytics tables: - users(user_id, country, signup_date) - listening_events(event_id, user_id, played_at, minutes_played) Because th...
Implement an ASCII Art Printer
Implement an ASCII art printer. A font defines each supported character as a glyph with the same height. A glyph is a list of equal-length text rows. ...
Implement Game Physics and Block Mining
You are given two independent coding tasks from the same interview category. Solve both. Task A: Flappy-Bird-Style Jump Boundary Function Implement a ...
Implement 2D convolution forward pass
Problem Implement the forward pass of a 2D convolution (conv2d) from scratch (no deep learning libraries). You are given: - Input tensor x with shape ...
Design a restaurant recommendation system
Question Design a restaurant recommendation system for a food delivery marketplace such as Uber Eats. When a user opens the home page, the system shou...
Implement a Spreadsheet With Formulas
Design and implement a small spreadsheet engine. Part 1: Basic cells Implement a Spreadsheet class that supports: - set_cell(cell_id, value): set a ce...
Design an OpenAI chatbot in two hours
Design and Build a Minimal Conversational Chatbot (2-Hour Coding Exercise) You are given an OpenAI API key and two hours. Design and implement a minim...
Design a Relational-to-DynamoDB Migration System
Design a production migration system that moves an existing e-commerce service from a relational database to DynamoDB with minimal downtime. Your desi...
Handle value conflicts and disagreeing with leadership
Behavioral / Values prompts Answer the following with specific examples (use the STAR method): 1. Have you ever made a decision that was “politically ...
Compute early signals for user retention
You are given two tables that track signups and user transactions. Tables users - user_id (STRING, PK) — unique user - signup_ts (TIMESTAMP) — time th...
Design a key-value store
System Design: Durable Key–Value Store Design a single-node, embeddable key–value store library with a simple API that must remain correct and durable...
Partition a Target String by Source Substrings
You are given two strings: - target: the string that must be represented. - source: the string whose substrings may be used. Return a partition of tar...
Answer leadership and ambiguity scenarios
Question Answer the following behavioral & leadership questions with concrete examples. Use a structured format such as STAR (Situation, Task, Actions...
Validate an IPv4 address string
Given a string s, determine whether it is a valid IPv4 address. A valid IPv4 address: - Has exactly 4 parts separated by dots (.): x1.x2.x3.x4 - Each ...
Investigate MAU Drop and Test Coupons
You are interviewing for a Data Scientist role at a ride-hailing company. The company defines MAU (Monthly Active Users) as the number of unique rider...
Count User Journey Prefixes
You are given a list of user activity logs. Each log record has the form [user_id, timestamp, action]. Example input: `text logs = [ [100, 1, "A"], ...
Design an Extensible Python File Parser
In Python, design a pluggable file parsing framework that can process multiple file formats such as CSV, JSON, and XML. Requirements: - Expose a commo...