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."
Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests
Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests Scenario A key revenue metric on Coinbase's dashboard suddenly declines—for...
Explain Bayes’ Theorem and P-Value in Decision-Making
Explain Bayes’ Theorem and P-Value in Decision-Making Statistics Fundamentals: Bayes' Theorem and p-Values Context Stakeholders want clear, decision-f...
Investigate Sudden Metric Changes and Design A/B Test
Investigate Sudden Metric Changes and Design A/B Test Scenario A core business metric (e.g., conversion, cancellations, or gross bookings) shows a sud...
Analyze Rider Behavior in Dynamic-Pricing Trial
Analyze Rider Behavior in Dynamic-Pricing Trial Dynamic-pricing trial: rider behavior Context (assumptions made explicit) - Each day the rider has two...
Evaluate Top-Dasher Program's Benefits and Challenges
Evaluate Top-Dasher Program's Benefits and Challenges Scenario DoorDash is considering several driver-facing initiatives: a Top-Dasher status, cash in...
Assess Cultural Fit Through Behavioral Interview Questions
Assess Cultural Fit Through Behavioral Interview Questions Onsite Behavioral & Leadership Interview — Data Scientist Scenario - 1-on-1 conversation wi...
Validate a Binary Search Tree
Validate a Binary Search Tree Problem Given a binary tree, return whether it is a valid binary search tree. For every node, every value in its left su...
Implement Cache Eviction And Seat Assignment
This question evaluates understanding of data structure design and algorithmic reasoning, covering cache eviction policies (least-recently-used) and s...
Solve Two Algorithm Challenges
These two problems evaluate algorithmic skills in array optimization and graph pathfinding: the first focuses on selecting three ordered, non-overlapp...
Design chat and online chess
This question evaluates a candidate's ability to design large-scale, real-time consumer systems, testing competencies in scalable architecture, data m...
Design transactional in-memory key-value store
Problem Design and implement an in-memory key–value store that supports basic operations plus transactions. Core API Implement the following operation...
Compute Top-K word frequencies under a path
Compute Top-K word frequencies under a path Given a filesystem path that may contain nested subdirectories and files, compute the top K most frequent ...
Describe communication to resolve ambiguity
Describe communication to resolve ambiguity Behavioral: Proactive Communication to Improve Outcomes Context: In a technical screen for a Machine Learn...
Explain Python, Java, and Memory Management
This question evaluates understanding of programming language concepts and runtime behavior—covering typing disciplines, runtime models, performance a...
Find balanced subarray and increasing tree path
You are given two coding problems. Problem 1: Longest balanced subarray (0/1) Given an integer array nums of length n where each element is either 0 o...
Compute p-values for 2 variants vs control
A/B/n test: compute p-values and make a ship decision You ran an online A/B/n experiment with 1 control and 2 treatment variants (A/B/C). You are give...
Remove Global Duplicates While Preserving Order
Remove Global Duplicates While Preserving Order Implement global_unique(values). values is a list of strings. Return a new list containing the first o...
Explain Option Greeks and Futures Pricing
This question evaluates understanding of derivatives and quantitative finance concepts—option Greeks (delta, gamma), PnL approximations, futures prici...
Design an online bookstore for browse and purchase
Design an online bookstore for browse and purchase System Design: Online Bookstore (Browse + Purchase) Context Design an online bookstore that allows ...
Find and count target-sum subarrays
Find and count target-sum subarrays Given an integer array nums and an integer target, implement: ( 1) a function that returns true if any non-empty c...