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."
How would you answer these behavioral prompts?
You are in a behavioral interview. Prepare structured answers (with concrete examples) for the following prompts. Expect follow-ups such as: Why was y...
Introduce yourself and explain your project
Behavioral questions 1. Introduce yourself (education/background, current role, what you focus on). 2. Where are you from? (brief personal background ...
Answer behavioral questions about delivery and influence
Behavioral questions Prepare structured answers (e.g., STAR) to the following: 1. Complex problem, simple solution: Give an example of a complex probl...
Design a Recipe Manager
Design an in-memory recipe manager with four levels of functionality. No UI is required; focus on clean APIs, data structures, and edge-case handling....
Implement matrix transforms and discuss eigenvalues
This question evaluates understanding of matrix manipulation and numerical linear algebra, including in-place matrix transforms and rotations, sparse ...
Choose Optimal Network Retry Threshold
You work on a mobile music streaming team responsible for improving playback reliability while minimizing battery drain. When the app is streaming aud...
How would you measure impact?
This question evaluates competency in causal inference and experimental design for production analytics, covering delayed outcomes, interference, conf...
Design an Extensible Rule Engine
Design an object-oriented rule engine that evaluates declarative rules against a record. The rule language must support comparison predicates such as ...
How would you investigate a metric decline?
Scenario You are a Data Scientist supporting a consumer marketplace product. A key business metric (e.g., orders/day, conversion rate, revenue, profit...
Design a Global Marketing Email Platform
This question evaluates a candidate's ability to design a scalable, reliable distributed system for global marketing email delivery, encompassing time...
Compute top-N posts in a workspace
Design a feature that returns the top-N posts (e.g., Confluence pages/blog posts) in a workspace. Requirements: - Define what “top” means (e.g., views...
Design a Ride Scheduler
This question evaluates object-oriented design, event-driven scheduling and simulation, state management for ordered task execution, API design, and h...
Design real-time modules communication and overload handling
You are designing a real-time system running on a single machine with two modules (e.g., producer -> consumer) that must communicate with low latency....
Minimum Cells to Bridge a Magic Grid
This question evaluates proficiency in graph traversal and shortest-path optimization within a 2D grid, testing the ability to find minimum-cost conne...
Design and Implement an LRU Cache
This question evaluates a candidate's ability to design and implement an LRU cache data structure with O(1) time complexity for both reads and writes....
Implement a uniq-like function
Implement a function similar to the Unix uniq utility. You are given a sequence of strings representing lines of text in the order they appear in a fi...
Implement Article Vote Tracking
This question evaluates data structures, state-management, and algorithmic skills for tracking per-user votes, detecting vote flips, maintaining a mos...
Design an Extensible Python File Parser
This question evaluates skills in designing extensible, modular file-parsing frameworks in Python, covering interface and API design, format detection...
Calculate Expected Users Linking Coinbase Wallets
Expected Coinbase Wallet Linking When users sign up for Coinbase, each of the n users is independently prompted to link a crypto wallet. Each user lin...
Describe leadership under changing priorities
Prepare structured answers for these behavioral questions: - Tell me about a time you went above and beyond expectations. - Tell me about a time you f...