Machine Learning Engineer + Data Scientist + Software Engineer 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."
Solve non-repeating show substring
Question LeetCode 3. Longest Substring Without Repeating Characters – variant where the elements are show names instead of numbers. https://leetcode.c...
Implement paginated, sortable dynamic table component
Implement paginated, sortable dynamic table component React Table Component: Pagination, Sorting, Dynamic Columns Context You are building a reusable ...
Implement bank balance operations
Question Design and implement a Bank account class that supports the operations Deposit(amount), Withdraw(amount), and CashBack(percent). Ensure balan...
Implement Python Function for Longest Unique Substring Length
Scenario Real-time text analytics service enforcing uniqueness constraints Question Implement a Python function returning the length of the longest su...
Calculate Ad Performance with Click-Through and Conversion Rates
impressions +---------+---------+---------------------+-----------+ | user_id | ad_id | event_time | platform | +---------+---------+-----...
Analyze Monthly Prime vs Non-Prime Sales and Price Buckets
sales +-----------+------------+----------+-------+ | order_id | order_date | is_prime | price | +-----------+------------+----------+-------+ | 1001...
Evaluate Python Class Design in Data Pipeline
Evaluate Python Class Design in Data Pipeline Scenario You are reviewing a Python class used in an ML/data pipeline that follows the scikit-learn-styl...
Address Missing Income Bracket in California Housing Data
Address Missing Income Bracket in California Housing Data ML Case: Missing Lowest-Income Bracket in California Housing Data Context You're building a ...
Demonstrate Culture Fit and Motivation in Meta Interview
Demonstrate Culture Fit and Motivation in Meta Interview Behavioral Interview: Culture Fit and Motivation (Meta — Data Scientist, Onsite) Prompt Answe...
Measure Late Deliveries and Identify Top Delayed Restaurants
orders +----------+---------+--------------+---------------------+-------------------------+-----------------------+ | order_id | user_id | restaurant...
Forecast Next Year's Revenue Using YoY% Analysis
ad_revenue +------------+---------+ | date | revenue | +------------+---------+ | 2023-01-01 | 1000 | | 2023-01-02 | 1200 | | 2024-01-01 |...
Visualize and Clean SKU Sales Data for Outliers
sales_data +------------+--------+-----------+----------+------------+---------+ | date | sku_id | unit_sold | revenue | promo_flag | store_id|...
Calculate Day-7 Retention Rate from User Post Data
post_activity +---------+------------+-------+ | user_id | post_date | posts | +---------+------------+-------+ | 1 | 2023-01-01 | 3 | | 1 ...
Explain Window Functions and Joins in SQL and Python
TABLE transactions | transaction_id | user_id | merchant | amount | currency | transaction_ts | | 1001 | 17 | Walmart | 45.80...
Identify Repeat Advertisers from Consecutive Weeks
SUBMISSIONS +--------------+-----------+-----------+ | advertiser_id| ad_id | week_id | +--------------+-----------+-----------+ | A123 ...
Estimate Fake Accounts Using Data Signals and Sampling
Estimate Fake Accounts Using Data Signals and Sampling Estimating Fake Accounts on a Social Network Background A large social platform wants to estima...
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...
Create OHLC Aggregates from Tick Data in Python
price_stream +-----------+-------+ | timestamp | price | +-----------+-------+ | 0 | 3 | | 1 | 2 | | 2 | 4 | | 3 ...
Compute Effective Reads with SQL and Python Streaming
post_read_events +----------+---------+-----------+---------+--------------------+---------------------+---------------------+ | event_id | user_id | ...
Interpret Results and Address Multiple Testing Concerns
Interpret Results and Address Multiple Testing Concerns Experiment Interpretation with Multiple Testing Context - An A/B experiment is run independent...