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."
Solve scheduling and collision problems
This question evaluates a candidate's understanding of algorithm design and data structures for resource allocation and dynamic interaction problems, ...
Implement store, evaluator, and parser
This question evaluates implementation skills in data structures and algorithms, covering time-based versioning and TTL in an in-memory key-value stor...
Discuss AI Safety and Ethics
In an initial recruiter screen for an AI-focused company, you are asked to briefly introduce your background, explain whether you reviewed the company...
Compute Sliding Window Averages
This question evaluates proficiency in array manipulation, sliding-window techniques, and algorithmic efficiency including time and space complexity. ...
Return a Package Build Order
You are given an API: `python get_dependencies(package) -> list[str] ` It returns the direct dependencies of a given package. If package A depends on ...
Implement File Tail and Sensor Health
This question evaluates skills in large-file streaming and buffer/pointer manipulation for tailing files, along with data-structure and time-window re...
Solve Two Grid Search Problems
This question evaluates proficiency in graph traversal on grids, specifically competencies in identifying connected components and modeling propagatio...
Implement a consistent hashing ring
Implement a class ConsistentHashRing that distributes keys across servers using a hash ring with virtual nodes. Required API: - ConsistentHashRing(rep...
Explain ML basics and recommender tuning
Explain the following machine learning topics clearly and discuss their practical trade-offs: - overfitting and common ways to prevent it, - bagging a...
Build a model to predict wine quality
Modeling task: Predict wine quality from a CSV You are given a clean CSV dataset about red wine. The target (dependent) variable is: - quality (intege...
Design a chunking strategy for RAG
You are building a Retrieval-Augmented Generation (RAG) system that uses an LLM plus a vector database. Before creating embeddings and indexing docume...
Count Connected Land Regions
You are given an m x n 2D grid representing a map. Each cell is either land ('1') or water ('0'). A land region is formed by connecting adjacent land ...
Design a time-windowed key-value store
Implement a time-windowed key-value store ("Windowed Map") that receives key/value updates at irregular times and only keeps entries from the most rec...
Find Feature Activation Order
This question evaluates graph-algorithms and dependency-resolution skills, including reasoning about prerequisite relationships, ordering constraints,...
Design a Versioned Key-Value Store
This question evaluates understanding of time-versioned data structures, temporal indexing, and efficient lookup strategies for storing and retrieving...
Solve four OA coding problems
This set of four problems evaluates core algorithmic competencies including array manipulation and counting in sorted arrays, resource-constrained opt...
Optimize Autonomy Mapping Components
An autonomy team runs perception and state-estimation code on a resource-constrained embedded computer. Discuss both of the following technical review...
Find Top Hashtags
You are given two arrays of length n: - tweets[i]: the content of the i-th tweet as a string - timestamps[i]: the publish time of the i-th tweet as an...
Design a recursive distributed file crawler
Design a distributed service that crawls a large file system starting from a root path. A client should be able to call an API to start a crawl job, a...
Compute worst-case guesses for adaptive hangman
You are given a set of distinct lowercase words, all of the same length. A hidden word is chosen from this set, but the host is adversarial: after eac...