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."
Recover from a Missed Deadline
Recover from a Missed Deadline Prompt Tell me about a deadline you missed or were on course to miss. Explain how the commitment was made, when you rec...
Design an Alert Notification Service for Downstream Consumers
Design an Alert Notification Service for Downstream Consumers Design an alert-notification system whose recipients are downstream services rather than...
Implement Masked Cross-Entropy with Label Smoothing
Implement numerically stable masked cross-entropy in NumPy with label smoothing and optional temperature scaling. Validate shapes, dtypes, finite logi...
Design Retrieval-Augmented Answers from a Document Vault
Design a service that accepts a user's prompt, searches a large document vault, and returns a grounded answer with citations to relevant source passag...
Implement A Prioritized Task Scheduler With Parent Dependencies
Implement a task scheduler. Each task has an id, due date, create time, high-priority flag, assignee, completion status, description, and optionally a...
Design a News Subscription Processing Engine
Design a news subscription processing engine with four core capabilities: receive a news item, add a subscription, remove a subscription, and publish ...
Design the GPU Job Scheduler for a Text-to-Video Generation Service
This system design question evaluates a candidate's ability to design a resource-scheduling layer for scarce, expensive compute under sustained overlo...
Implement Deterministic Merkle Hashing for a Repository
Implement Deterministic Merkle Hashing for a Repository You are given a repository abstraction with operations to identify files and directories, read...
Deduplicate and Order Batch and Streaming Logs
Deduplicate and Order Batch and Streaming Logs Each log entry is a pair (timestamp, message). Two entries are duplicates when their message strings ar...
Design a Rule Evaluation Engine for Spending Policy Violations
Design an extensible rule-evaluation engine for a corporate spending product. Employees submit expenses, and managers choose policies that flag expens...
Design an Embedding and Classification API
Design an Embedding and Classification API Design a service that accepts text items, generates vector embeddings, and optionally classifies each item ...
Design a Robust Feature Flag Evaluation Engine
You are given feature definitions and user records as JSON. Each feature flag has a key, an enabled switch, a default Boolean, and an ordered list of ...
Design a Tunable Recurring-Transaction Detector
Design a Tunable Recurring-Transaction Detector You receive a file of transactions and need to identify likely recurring payments such as subscription...
Find the Minimum Absolute Difference
Find the Minimum Absolute Difference Implement minimum_absolute_difference(values). Given at least two integers, return the smallest absolute differen...
Implement Generalized Tic-Tac-Toe
Implement Generalized Tic-Tac-Toe Implement a TicTacToe class for two players on an m by n board with a configurable winning length k. `text TicTacToe...
Implement a Removable Nested-List Iterator
Implement a Removable Nested-List Iterator Implement an iterator over a mutable array of integer arrays. Traversal goes left to right within each inne...
Minimize Replacements So Equal Product Values Are Contiguous
Minimize Replacements So Equal Product Values Are Contiguous You are given the quality value of each product in a line. In one operation, choose two d...
Solve a Set of Probability and Quantitative Reasoning Problems
Solve the following quantitative reasoning problems. Show enough work to make each result auditable, state any interpretation you need, and keep exact...
Design a Stateful Working Hours Register
Design a working-hours register for employees who badge into and out of an office. Describe the data model, public operations, validation rules, and a...
Clarify and Design Social-Graph Milestones
Clarify and Design Social-Graph Milestones An interview exercise progresses through a social graph with snapshots, a milestone for retrieving follower...