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."
Find nearest common manager for multiple employees
Given an organizational hierarchy modeled as a rooted tree, build the tree from (employee, manager) pairs and implement a function that, for k ≥ 2 emp...
Explain motivation, strengths, dislikes, and tech stack
Explain motivation, strengths, dislikes, and tech stack Behavioral & Technical Self‑Assessment (Software Engineer, Take‑Home Project Round) Context: Y...
Design a weather aggregation system
Design a weather aggregation system System Design: Weather Data Aggregation (10-minute Updates) Context Build a service that periodically fetches weat...
Check diagonal equality in a matrix
Given an m x n integer matrix, determine whether every top-left to bottom-right diagonal contains identical values (all elements along each such diago...
Compute max simultaneous drivers last 24 hours
Given delivery intervals (driverId, startTime, endTime) already recorded, implement maxSimultaneousDriverInPast24Hours() that returns the maximum numb...
Implement sliding-window moving average
Design a class MovingAverage that supports a constructor MovingAverage(k) and a method next(val) returning the average of the last k values from a dat...
Merge overlapping time intervals efficiently
Given a list of closed intervals [start, end] with 0 <= start <= end, merge all intervals that overlap or touch and return a minimal set of non-overla...
Implement version string comparator with extensions
Implement a function compareVersions(a, b) that compares two software version strings. Each version consists of dot-separated numeric components (e.g....
Compute prices, distances, and Top-K for orders
Compute prices, distances, and Top-K for orders Build functions for a food‑delivery analytics module. Data: - Restaurants: id, (x, y) location, menu m...
Determine feasible task ordering
You are given n tasks labeled 0..n−1 and a list of dependency pairs (a, b) meaning task a requires task b to be completed first. Implement functions t...
Implement Connect Four with win detection
Implement a Connect Four game engine. Support a general m×n board (default 6× 7) and a win condition of k in a row (default 4). Provide an API: Connec...
Explain using MapReduce
Explain using MapReduce Using the MapReduce Programming Model to Process Large Datasets You are asked to explain how the MapReduce programming model p...
Solve BFS grid delivery routing
You are given an m×n grid representing a city: 'S' are DashMart stores, 'H' are homes, '.' are roads, and '#' are obstacles. Movement is allowed in fo...
Implement 64-bit modular exponentiation safely
Implement a function to compute (a^b) mod m where 0 ≤ a,b < 2^61−1 and 1 ≤ m < 2^61−1 using only 64-bit operations without overflow. Provide implement...
Design test logging and failure-window queries
Build an in-memory service to log test run results and answer two queries. Assumptions: events arrive with strictly increasing timestamps across all t...
Implement island counting with BFS and DFS
Question You are given an m x n grid of characters where '1' represents land and '0' represents water. Count the number of distinct islands (connected...
Design document-tag classes with concurrency safety
Design document-tag classes with concurrency safety System Design: In‑Memory Document–Tag Manager (Single Node) Context You are designing an in-memory...
Compare cloud compute; design Kubernetes security and CI/CD
Compare cloud compute; design Kubernetes security and CI/CD Cloud Compute Models, Testing Strategies, Kubernetes Deep Dive, Security, and CI/CD to GKE...
Pivot data without date libraries
Transform a tall dataset into a wide, pivoted view without using any date/time libraries. Input: a list of records (date, store_id, metric, value) whe...
Write conditional aggregates with CASE WHEN
Write conditional aggregates with CASE WHEN Write a query that produces conditional aggregates using CASE WHEN (e.g., counts of approved vs declined t...