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."
Maximum Currency Conversion Rate
Maximum Currency Conversion Rate You are given N currency exchange rate pairs. Each pair is a triple (from_currency, to_currency, rate), meaning that ...
Solve classic array, graph, and parsing problems
Implement and analyze solutions to the following independent tasks: 1) Expression evaluator: Given a string s of digits, '+', '-', '*', '/', and space...
How would you measure shop-ads promotion success?
Context You work on an ads ranking/serving system for an e-commerce product. A new ads algorithm is intended to promote “shop ads” (ads that drive use...
Minimize image processing cost with discount
Question You have n images. For the i-th image, processing costs filterCost[i] per day and must run from startDay[i] to endDay[i] inclusive. Each day ...
Count uniques in sparse sorted array
Question A sorted array contains many duplicates but only a very small number of distinct values. Design an algorithm that counts how many unique numb...
Count subarrays summing to target
Question LeetCode 560. Subarray Sum Equals K – Given an integer array nums and an integer k, return the total number of continuous subarrays whose sum...
Aggregate Netflix metrics in SQL
Question Netflix video-streaming analytics SQL: Write a simple aggregation (e.g., total watch-time per day). Build a cumulative metric: today’s metric...
Solve programming task with follow-ups
Question Pure programming problem solving: implement the core algorithmic solution, then extend it to ( 1) support a constraint of consecutive N eleme...
Identify Duplicate Posts by User and Date
posts +---------+---------+---------------------+---------------+ | post_id | user_id | created_at | content | +---------+---------+---...
Visualize and Clean SKU Sales Data for Outliers
sales_data +------------+--------+-----------+----------+------------+---------+ | date | sku_id | unit_sold | revenue | promo_flag | store_id|...
Analyze Retention Metrics Using SQL and Python
transactions +----------+--------+------------+---------+-----------+ | user_id | txn_id | txn_date | amount | is_fraud | +----------+--------+--...
Calculate and Find Average Contacts and Sync Percentage
dw_peers +--------------+---------------+-------------+ | user_id | synced_contact| date_synced | +--------------+---------------+-------------+ ...
Design a Scalable, Fault-Tolerant Distributed Order System
Scenario Round covering distributed-system design and algorithm implementation. Question Design a highly available, low-latency distributed order-proc...
Analyze Pirate Theme Usage Growth Over Time
themes +----+--------------+-----------+ | id | name | is_pirate | +----+--------------+-----------+ | 1 | Pirate Red | true | | 2 | ...
Evaluate K-Fold Cross-Validation for Model Selection
Evaluate K-Fold Cross-Validation for Model Selection Model Selection and Validation for a New Feature Launch You are selecting and validating predicti...
Compute Customer Spend and Engineer Features for 2023
transactions +-----------+-------------+--------+------------+--------------+ | tran_id | customer_id | amount | tran_date | merchant_cat | +------...
Measure Late Deliveries and Identify Top Delayed Restaurants
orders +----------+---------+--------------+---------------------+-------------------------+-----------------------+ | order_id | user_id | restaurant...
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...
Identify Session with Maximum Overlapping Sessions Count
sessions | session_id | start_time | end_time | | 1 | 2023-01-01 09:00:00 | 2023-01-01 10:00:00 | | 2 | 2023-0...
Generate Daily Unique User Views for Each Shop
shop_views +---------+---------+---------------------+ | user_id | shop_id | view_time | +---------+---------+---------------------+ | 101 ...