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."
Design an ad frequency capping system
This question evaluates a candidate's ability to design scalable, low-latency distributed systems that enforce ad frequency caps across users, devices...
Analyze and debug Python utilities
Analyze and debug Python utilities You are given a snippet where a Python helper class repeatedly reads from an HTTP response stream and writes output...
Should a Restaurant Partner with Groupon?
This question evaluates the ability to analyze unit economics, marginal profitability, and cannibalization effects using quantitative assumptions and ...
Describe conflict resolution and leadership
In a senior software engineering phone screen, you may be asked several behavioral questions around collaboration, conflict management, and leadership...
4.2 Design a Collaborative Document Editor
Real-time collaborative editing is one of those features that feels magical when it works — and absolutely nightmarish to build from scratch. Google D...
Implement Sliding Windows and LRU Cache
You are given two coding tasks. Task 1: Longest Subarray of Ones Given a binary array nums and an integer k, return the maximum length of a contiguous...
Prioritize Under a Tight Deadline
Tell me about a project where you had to deliver under a tight deadline. In your answer, be prepared to explain: - What the project was and why the de...
Validate KYC CSV Records
This question evaluates skills in CSV parsing, string normalization, field-level validation, and rule-based text matching, emphasizing attention to ed...
Design Sliding-Window Average Tracker
This question evaluates design and implementation of a time-windowed tracking data structure, focusing on streaming aggregation, handling monotonic ti...
Solve movie ratings, array, release scheduler
Question This is a three-part coding screen used for a Data Scientist role at DRW. You will work through three independent array/sequence problems, ea...
Implement account CRUD and transfer
Implement account CRUD and transfer Design and Implement Money Movement APIs Context You are building a small money-movement service for a single curr...
Compute probability with colored balls draws
Compute probability with colored balls draws Probability with Replacement-on-Green Draws Context You have a bag with colored balls. You draw balls one...
Build pipeline for imbalanced classification
Build pipeline for imbalanced classification Build an Imbalanced Classification Pipeline (scikit-learn + imbalanced-learn) Context You are given a tab...
Explain motivation and background
Explain motivation and background Behavioral Phone Screen — Software Engineer Context You are in a technical phone screen for a Software Engineer role...
Design file-embedding storage system
Design file-embedding storage system System Design: Multimodal Embedding Service for User Uploads Context You are designing a backend service that, fo...
Discuss complex project choices
Discuss complex project choices Behavioral Interview Prompts — Software Engineer (Onsite) Prompt 1: Most Complex Project Describe the most complex pro...
Describe Your Path and Key Data Science Project
Describe Your Path and Key Data Science Project Onsite Behavioral + Project Deep Dive (Data Scientist) Context You are in an onsite behavioral round f...
Analyze Causes of November and June Shopify Traffic Spikes
Analyze Causes of November and June Shopify Traffic Spikes Analyzing Recurring and One-off Spikes in Weekly Shopify Sessions Scenario You have a three...
Calculate Expected Users Adopting Wallet Feature
Calculate Expected Users Adopting Wallet Feature Wallet Feature Adoption – Probability and Expectation Setup - You are analyzing adoption of a new wal...
Estimate Viewer Engagement with Super Bowl QR Code Promo
Estimate Viewer Engagement with Super Bowl QR Code Promo Estimation Case: Super Bowl QR Promo Scans and Redemptions Scenario Coinbase runs a Super Bow...