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."
Match payments to invoices with fallback rules
This question evaluates a candidate's ability to design robust record-matching logic that handles identifier-based matches, fallback heuristics, and n...
Debug online worse than offline model performance
This question evaluates the ability to diagnose discrepancies between offline and online model performance by reasoning about data distributions, feat...
Answer core Python, CS, DB, and testing questions
This multi-part prompt evaluates core software engineering competencies including Python fundamentals (OOP, object/model behavior, iterators/generator...
Design first-time Kubernetes deployment in new cloud
This question evaluates system design and cloud platform engineering skills focused on first‑time Kubernetes deployment, covering account bootstrappin...
Reverse Linked List Groups
This question evaluates linked list manipulation, pointer/reference management, in-place iterative algorithms, and the ability to enforce O(1) extra s...
Replace Delimited Tokens in a String
This question evaluates string parsing, token recognition, and dictionary lookup competencies for robust text replacement, including handling malforme...
Execute TTL Cache Operations with Fetch-on-Miss
Execute TTL Cache Operations with Fetch-on-Miss Implement a pure simulator for a TTL cache. The simulator includes put, get, delete, size, and a deter...
Implement Snapshot Iterator Without Order Guarantees
Design and implement a mutable collection that supports snapshot iteration. The collection stores unique values and supports the following operations:...
Split Markdown Into Header-Aware Chunks
Implement a function that splits a Markdown document into ordered chunks, where each chunk must not exceed a given size limit. A Markdown header is a ...
Implement Caches, Undo, and Traversal
Solve the following coding tasks. For each task, define clean APIs, implement the core logic, and be prepared to explain time and space complexity. Ta...
Solve path and inventory problems
This question evaluates algorithmic problem-solving skills around numeric robustness and stateful stream processing, specifically testing reasoning ab...
Simulate Plant Infection Spread
This question evaluates graph traversal and grid-based simulation skills, including modeling a 2D grid as a graph, propagation dynamics with obstacles...
How to evaluate a new homepage feature
Question PayPal is planning to launch a new homepage feature (for example, a new CTA module, personalized content, or a redesigned layout) and wants t...
Settle Group Expenses with Transfers
You are given a list of group expense transactions from a trip. Each transaction contains: - payer: the person who paid the full amount. - amount: the...
Design an image crawler for unlimited URLs
Design a service that crawls images starting from a set of root URLs. Requirements: - Input: one or more root URLs. - Crawl pages, discover links, and...
How do you answer common HR screen questions?
You are interviewing for a senior-level role and have a first-round HR/recruiter screening call. Prepare strong, concise responses to the following co...
Compute probability at least one user uses feature
Problem Assume there are \(n\) users. Each user independently uses a certain feature with probability \(p\). 1) What is the probability that at least ...
Design versioned in-memory key-value store
This question evaluates understanding of in-memory data structures, versioning semantics, rollback mechanisms, and performance trade-offs between time...
Implement a Snowflake Query Client
Build a lightweight query client for a Snowflake-like data warehouse. Implement a QueryClient that can: 1. Connect to the warehouse using configuratio...
Implement Game Physics and Block Mining
You are given two independent coding tasks from the same interview category. Solve both. Task A: Flappy-Bird-Style Jump Boundary Function Implement a ...