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."
Determine Length of Longest Unique Substring
Scenario Online assessment: coding portion that follows the SQL questions. Question Implement a function that, given a string s, returns the length of...
Identify Number Pairs Adding to Target in Array
Scenario Coding round to identify all number pairs that add up to a target in an array containing duplicates. Question Given an integer array (may con...
Compute User Retention and Analyze Event Data
user_events +---------+---------------------+------------+-------+ | user_id | event_time | event_type | page | +---------+-----------------...
Generate Synthetic Clickstream Data with Python Function
Scenario The analytics team needs to generate synthetic click-stream records to test a new reporting pipeline before real traffic arrives. Question Wr...
Assess Cultural Fit and Motivation for Joining CloudTrucks
Assess Cultural Fit and Motivation for Joining CloudTrucks Behavioral Interview — Data Scientist Phone Screen (CloudTrucks) Scenario A recruiter is as...
Pre-process Financial Data for Linear Regression Modeling
market_data +------------+----------+----------+--------+ | date | feature1 | feature2 | target | +------------+----------+----------+--------+ ...
Analyze Recent User Activity from Video Call Logs
video_calls caller | recipient | ds | call_id | duration 123 | 456 | 2019-01-01 | 4325 | 864.4 032 | 789 | 2019-01-01 | 9395 | 263.7 456 | 032 | 2019-...
Calculate Daily Visibility Score for Each Shop
shop_events | user_id | event_time | event_type | product_id | shop_id | |---------|------------|------------|------------|---------| | 101 | 2023...
Measure Late Deliveries and Identify Top Delayed Restaurants
orders +----------+---------+--------------+---------------------+-------------------------+-----------------------+ | order_id | user_id | restaurant...
Select Top Customers Using Transaction Data Filters
transactions +----+---------+------------+--------+ | id | user_id | order_date | amount | +----+---------+------------+--------+ | 1 | 101 | 202...
Analyze Cross-Country Call Data for Recent Trends
Users +---------+-------------+----------+ | user_id | signup_date | country | +---------+-------------+----------+ | 1 | 2021-01-04 | US ...
Retrieve First Active and Last Inactive Dates per User
Given a table activity that tracks user activities, write a SQL query to retrieve the first active date and last inactive date for each user. Table Sc...
Analyze User Engagement and Spammer Read-Rate in SQL
messages +------------+------------+-------------+--------------+-----------+ | sender_id | receiver_id| message_id | sent_date | read_date | +--...
Design A/B Test to Measure PayPal Cashback Value
Design A/B Test to Measure PayPal Cashback Value Scenario PayPal plans to offer a targeted cashback incentive for purchases at Walmart. You need to de...
Understand SQL: DELETE vs TRUNCATE, VIEW vs TABLE, CROSS JOIN
employees +----+--------+---------+ | id | name | dept_id | +----+--------+---------+ | 1 | Alice | 10 | | 2 | Bob | 20 | | 3 | Car...
Measure and Improve Listing Quality with Key Metrics
Measure and Improve Listing Quality with Key Metrics Evaluating and Improving Listing Quality in an Online Marketplace Scenario You are a product/anal...
Analyze Top 10 Items' Revenue Contribution by Category
sales +----------+------------+---------+---------+------------+ | order_id | category | item_id | revenue | order_date | +----------+------------+-...
Find available reservation time slots
Problem You are building an API to show which time slots are available for booking at a restaurant. You are given: - The restaurant’s opening hours (p...
Compute longest palindromic subsequence
Given a string s (1 ≤ |s| ≤ 2000), implement a function that returns the length of the longest subsequence of s that reads the same forward and backwa...
Compute cumulative metrics with full joins
Tables: - daily_metrics(date DATE, content_id STRING, daily_value BIGINT) - cumulative_metrics(date DATE, content_id STRING, cumulative_value BIGINT) ...