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."
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...
Compute balances and array queries
Question Given a list of transactions where each transaction has a userId and an amount (positive for credit, negative for debit), compute the final b...
Solve string match and DashMart BFS
Question Implement a string-matching function that returns the first index of a pattern in a text (akin to LeetCode 28 Implement strStr()). 2) “Dash M...
Check diagonal and compute window statistics
Question Given a square matrix, determine whether all elements on its main diagonal are identical. LeetCode 346. Moving Average from Data Stream – des...
Solve odd-string, digit swap, patient slot assignment
Question Task 1 – Odd-occurrence string: Write a function that, given an integer N (1..200 000), returns a length-N lowercase string in which every le...
Design cloud & k8s architecture
Design cloud & k8s architecture Technical Screen: Kubernetes, Cloud Services, and Secure CI/CD Context You are designing and operating services on Kub...
Design test-run logging and query functions
Question Implement log(test_id, timestamp, status) to record a test run, where timestamps are strictly increasing across all test IDs. Implement get_m...
Estimate Venmo Revenue and Boost User Engagement Metrics
Estimate Venmo Revenue and Boost User Engagement Metrics Growth and Monetization Case: Venmo (Peer-to-Peer Payments) Context You are evaluating growth...
Calculate Week-over-Week Revenue Change Using SQL
transactions +----+---------+---------+------------+ | id | user_id | revenue | order_date | +----+---------+---------+------------+ | 1 | 101 | ...
Calculate Response Rate and Compare New vs. Existing User Scores
survey_events +---------+------------+-----------+--------------+---------------------+ | user_id | is_new_user| responded | survey_score | event_time...
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...
Identify 3-Person Call Cycles in Video-Calling App
Calls callerid | recipientid | ds | call_id | duration 1001 | 2001 | 2023-02-20| 555 | 180 2001 | 3001 | 2023-02-20| ...
Compute Total Spent in 2023 Excluding Refunds
transactions +----------------+---------+-------------+--------+------------------+ | transaction_id | user_id | merchant_id | amount | transaction_da...
Compare Instagram and Facebook Stories Using Key Performance Metrics
Compare Instagram and Facebook Stories Using Key Performance Metrics Scenario You are a data scientist tasked with quantitatively comparing the succes...
Simulate Radioactive Decay to Validate Analytical Solution
Scenario Same radioactive-decay problem, but now validate the analytical answer via simulation during the interview. Question Share screen and write r...
Find Index Pairs of Matching Elements in Arrays
Scenario Marketing analytics team needs to find common elements between two sorted arrays of user IDs. Question Given two sorted integer arrays withou...
Calculate Customer Lifetime Value for Spokeo Using Models
Calculate Customer Lifetime Value for Spokeo Using Models Estimate Customer Lifetime Value (CLV) for Spokeo Context Spokeo monetizes via consumer subs...
Design a Controlled TV-Advertising Experiment for Sign-Ups
Design a Controlled TV-Advertising Experiment for Sign-Ups Controlled TV Advertising Experiment: Incremental Website Sign-ups Context You are asked to...
Explain Your Career Transition and Motivation for Joining Spokeo
Explain Your Career Transition and Motivation for Joining Spokeo Behavioral Interview — Data Scientist (Onsite) Context You are in an HR/Manager behav...
Diagnose Causes of High Out-of-Stock Rate in Groceries
Diagnose Causes of High Out-of-Stock Rate in Groceries Product and Operations Case: Grocery OOS, Delivery Radius, and Free Delivery Context You are a ...