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."
Calculate Expected Draws for X > 0.8 in Uniform(0,1)
Calculate Expected Draws for X > 0.8 in Uniform(0,1) Scenario Quick probability check during a first-round screen to gauge statistical intuition. Ques...
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| ...
Solve Data-Structure Problems in Python Interview Round
Scenario Interview coding round focusing on simple data-structure problems in Python. Question Given an integer, rearrange its digits (considering onl...
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...
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...
Diagnose Business Decline Using Key Data Metrics
Diagnose Business Decline Using Key Data Metrics Diagnose a Sudden Business Downturn Using Data Context You are the data scientist supporting a large ...
Resolve Conflicts Between Data Findings and Team Opinions
Resolve Conflicts Between Data Findings and Team Opinions Behavioral Scenario: Resolving Conflicts Between Data Findings and Team Beliefs Scenario You...
Identify Repeat Advertisers from Consecutive Weeks
SUBMISSIONS +--------------+-----------+-----------+ | advertiser_id| ad_id | week_id | +--------------+-----------+-----------+ | A123 ...
Visualize and Clean SKU Sales Data for Outliers
sales_data +------------+--------+-----------+----------+------------+---------+ | date | sku_id | unit_sold | revenue | promo_flag | store_id|...
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...
Select Top Customers Using Transaction Data Filters
transactions +----+---------+------------+--------+ | id | user_id | order_date | amount | +----+---------+------------+--------+ | 1 | 101 | 202...
Measure Pirate-Theme Usage and Revenue Growth Over Time
theme_usage +-----------+------------+-------------+ | user_id | theme_name | created_at | +-----------+------------+-------------+ | 101 | p...
Compute User Retention and Analyze Event Data
user_events +---------+---------------------+------------+-------+ | user_id | event_time | event_type | page | +---------+-----------------...
Identify Top-3 Users by Recent Total Spend
Users +----+-------+-------------+ | id | name | joined_date | +----+-------+-------------+ | 1 | Alice | 2023-01-02 | | 2 | Bob | 2023-02-14 |...
Identify Key Metrics for Monitoring Shipment Defects
shipment +-------------+----------+------------+---------+---------+ | shipment_id | order_id | ship_date | carrier | status | +-------------+------...
Find Minimum Path Sum in Integer Triangle
Scenario Tech interview round 1 – dynamic programming challenge Question Given a triangle of integers, find the minimum path sum from top to bottom. A...
Calculate Longest Transaction Streak for Each User
transactions +---------------+---------+--------+----------------+-----------+----------+ | transaction_id| user_id | amount | transaction_date| merch...
Merge and Clean Customer Order Data for Analysis
customers +----+---------+---------+ | id | name | country | +----+---------+---------+ | 1 | Alice | US | | 2 | Bob | UK | | 3 ...
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...
Solve Search Insert Position Using Binary Search
Scenario Live coding round for an Amazon Applied Scientist position; candidate must solve LeetCode 35 (Search Insert Position) without helper librarie...