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 for TikTok Live creator metrics
You are analyzing TikTok Live sessions and their engagement. Tables live_room Each row is a Live session (“room”) launched by a creator. | column | ty...
Match a string with wildcard pattern recursively
This question evaluates proficiency in string pattern matching, recursive problem decomposition, and algorithmic optimization including handling wildc...
Find start indices of anagram substrings
You are given two strings: - s: the text string - p: the pattern string Return a list of all starting indices i such that the substring s[i : i + len(...
Implement Cache and Key-Value Store
The interview report mentions coding tasks similar to the following: 1. Bounded cache Implement a cache with a fixed capacity. Support: - get(ke...
Implement a recent-use eviction cache
This question evaluates a candidate's ability to design and implement a fixed-capacity key-value cache with a recent-use eviction policy, emphasizing ...
Implement k-th largest in a number stream
You are designing a small library to monitor statistics over a stream of integers. Implement a data structure that, given an integer k and an initial ...
Compute square root to 1 decimal
Problem Given a non-negative real number x, implement a function sqrt1dp(x) that returns \(\sqrt{x}\) rounded (or truncated—clarify with interviewer) ...
Write SQL for character safety and engagement metrics
You are working with a conversational product that has users, AI characters, and conversations. Write SQL queries for each of the tasks below. Assume ...
Design top-K frequency structure
Design an in-memory data structure that supports: add(x) to observe an item, inc(x) to increment its frequency, dec(x) to decrement (deleting when zer...
Detect cycles in lists and graphs
Given a singly linked list, determine whether it contains a cycle. Implement an O( 1)-space algorithm and explain the intuition and correctness. Follo...
Design payment-to-invoice matcher with priorities
Design and implement a payment-to-invoice matcher. Inputs: (a) invoices, a list like ["invoice-id-1, 10000, 2022-01-01", "invoice-id-2, 30000, 2022-01...
Design card deck with shuffle and order
Design a playing-card deck library with two methods: shuffle() to return a uniformly random permutation of a standard 52-card deck, and order() to ret...
Decide transform via one-to-one mapping
You are given two strings s and t of equal length over the lowercase English alphabet. In one step, you may pick any character x and replace all its o...
Merge two sorted arrays in-place
You are given two nondecreasing arrays A and B, where A has enough trailing empty slots to hold all elements of B. Merge B into A in-place so that A r...
Compute max profit from single stock trade
Given an array prices where prices[i] is the stock price on day i, compute the maximum profit achievable with at most one transaction (one buy and one...
Compute unique-dasher concurrency with tie-breaking
You are given N delivery assignments, each as (dasherId, startTime, endTime) with 0 <= startTime < endTime. A single dasher may hold multiple overlapp...
Solve library SQL and Python tasks
You are given a library domain. Assume these tables: - books(book_id, author_id, title) - authors(author_id, name) - copies(copy_id, book_id, conditio...
Solve a Skyscraper puzzle efficiently
Design and implement a solver for the Skyscraper logic puzzle on an $N \times N$ grid, where $3 \le N \le 7$. The board is a grid of building heights....
Solve BST range average and merge intervals
1) Given a binary search tree and an inclusive range [L, R], compute both the sum and the average of all node values where L <= val <= R. Use the BST ...
Implement binary tree in-order traversal
Given the root of a binary tree, return the in-order ordering of its node values. Implement both a recursive solution and an iterative solution using ...