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."
Compute maximum currency exchange rate
Compute maximum currency exchange rate You are given a set of currencies and the direct exchange rates between some pairs of them. Each direct exchang...
Find max min-plus-max over all subarrays
Find max min-plus-max over all subarrays You are given an array arr of n integers. A subarray is a contiguous non-empty segment of the array. For any ...
Validate normalized palindromes with variants
Implement a function isNormalizedPalindrome(s) that returns true if s reads the same forward and backward after removing non‑alphanumeric characters a...
Explain Java DI, AOP, and transactions
Explain how dependency injection and AOP proxies are implemented in a modern Java framework such as Spring: bean lifecycle (creation, post-processing,...
Identify OS component causing process starvation
A system with 2 CPU cores runs 5 identical processes continuously. Four processes get equal CPU time, but the fifth appears to get none. Which part of...
Implement tiered shipping calculator
Implement tiered shipping calculator Implement in JavaScript a shipping-cost calculator with three progressively richer pricing models based on a conf...
Implement a simplified multi-level banking system
Implement a simplified multi-level banking system Implement a simplified banking system with multi-level requirements. All operations accept a stringi...
Solve three mini-game algorithm tasks
Solve three mini-game algorithm tasks Solve three mini-game algorithm tasks: (a) Move-House Puzzle: Given initial and target arrangements of N labeled...
Compute nearest dashmart and busiest assignments
Compute nearest dashmart and busiest assignments You are given an m x n grid of characters where 'D' marks a dashmart, 'X' marks an impassable cell, a...
Design event timeout detector
Design and implement an event-timeout detector for a job scheduler. Inputs: a global timeout T and a stream of events; each event has {event_id, type ...
Implement inventory allocation with backorders
Implement inventory allocation with backorders Design and implement a function to process an event stream for an e-commerce marketplace. Input: ( 1) i...
Implement range-sum tree and sort merged lists
Implement range-sum tree and sort merged lists 1) Given a binary tree whose nodes store integer values, and two integers low and high defining an incl...
Parse chemical formula with multipliers
Parse chemical formula with multipliers Given a string representing a chemical formula, parse it and return the total count of each element. The formu...
Describe achievements, ambiguity, conflict, efficiency, challenges
Describe achievements, ambiguity, conflict, efficiency, challenges Behavioral Technical Screen — Multi-part Prompt Context: You are interviewing for a...
Compute sum of longest positive subarray
Compute sum of longest positive subarray Given an integer array that may contain positive and negative numbers, find the sum of the longest contiguous...
Detect currency arbitrage with costs
You are given a K×K matrix R of currency exchange rates where R[i][j] is the amount of currency j obtainable for one unit of currency i, and R[i][i] =...
Count decodings of a digit string
Count decodings of a digit string You are given a non-empty digit string s consisting of characters '0'–'9' and a mapping where 1->'a', 2->'b', ..., 2...
Design refundable transaction ledger and prioritization rules
Design and implement a transaction ledger that ingests a stream of records where each record is either a payment or a refund. Each payment has {id, us...
Compute minimal cost to merge numbers
Compute minimal cost to merge numbers Given an array of positive integers, you may repeatedly perform the following operation until one number remains...
Compute total covered interval length
Compute total covered interval length Given a list of integer intervals [l, r) (half-open), compute the total length covered by at least one interval....