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."
Decode and Explain Ambiguity in Compression Strings
Scenario Compression library that encodes an array as count-value pairs where value is one digit but count may be many digits. Question Implement deco...
Calculate Engagement Metrics for Info-Stream Content Analysis
info_stream_views +----------+-----------+--------------+----------+------------+ | post_id | viewer_id | relationship | duration | ds | +---...
List Departments with Student Counts Including Zero
Students +----+--------+---------+ | id | name | dept_id | +----+--------+---------+ | 1 | Alice | 1 | | 2 | Bob | 2 | | 3 | Caro...
Maximize Stock Trading Profits Using Dynamic Programming
Scenario Evaluating dynamic-programming skills on stock-trading profits. Question Given an array of daily stock prices and an integer K, write Python ...
Communicating Top-Down Change
Communicating Top-Down Change Across an Operations Organization A VP has mandated an operations-wide initiative to improve safety, increase efficiency...
Tiktok DS Interview Questions
Scenario: You are provided with two tables: minute_streamed and minute_viewed. The minute_streamed table records each minute of streaming activity, wh...
In-Memory Key-Value Database with Nested Transactions
In-Memory Key-Value Database with Nested Transactions Implement an in-memory key-value database that processes a sequence of commands and supports nes...
Constant-Time Insert, Remove, and Uniform Random Sampling
A data-sampling service maintains a dynamically changing pool of integer example IDs. Examples are continuously added and retired, and the service mus...
Greedy Longest-Match Tokenizer for an LLM Data Pipeline
You are building a text pre-processing step for a large-language-model training pipeline. Before raw text can be fed into the model, it must be split ...
User Activity Analytics: Unique Users per Activity and Average Time on Site
User Activity Analytics You are given a collection of records, where each record captures a single user's action on a website. Each record is a dictio...
Median, Variance, and Linear Trend of a Daily Temperature Dataset
Median, Variance, and Linear Trend of a Daily Temperature Dataset You are given n daily temperature readings collected in New York City. The data is a...
Fill Missing Time-Series Values with Linear Interpolation (Duplicate Timestamps Allowed)
Fill Missing Time-Series Values with Linear Interpolation (Duplicate Timestamps Allowed) You are given readings from a single sensor as a list of reco...
Delete a Node From a Search Tree
Given the root of a binary search tree and an integer key, delete the node whose value equals key if it exists. Return the possibly new root while pre...
[SQL] Job Ad Metrics with Applicant Filter
Job Ad Metrics Analysis Task Table Structure Table: job_activity job_id INT candidate_id INT activity_type VARCHAR -- can be 'view' or 'apply' Requi...
Solve prefix, array, and string problems
This set of problems evaluates proficiency in string and array algorithm design—covering prefix search, subsequence matching, and maximal-area computa...
How would you A/B test first trade rate?
Coinbase wants to increase the rate at which newly signed-up retail users place their first trade. Design an A/B test for a product change intended to...
Describe building and improving a dashboard
Describe a past project where you built a dashboard for business or product stakeholders. Explain the business goal, audience, metrics, data-quality w...
Solve Banana Speed and Interval Merge
During two technical phone screens for a new graduate software engineering role, the candidate was asked to solve two coding problems: minimum eating ...
Solve Grid and Counting Problems
A software engineering intern phone screen included two coding tasks: 1. Count islands in a grid Given an m x n grid of characters where '1' re...
Write SQL for content view metrics by device
Write SQL for content view metrics by device You are a reporting analyst for a news subscription product. You have a fact table of page/content view e...