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."
Design a container image registry
This question evaluates a candidate's competency in designing large-scale distributed systems for artifact storage and delivery, including storage arc...
Implement Optimal Bucket Batching
You are given an array lengths of K document lengths and an integer G representing the number of available GPUs. A batch is assigned to one GPU, and e...
Design a fair event registration queue API
This question evaluates a candidate's ability to design an in-memory, FIFO event registration service using object-oriented design, testing knowledge ...
Design a Twitter hashtag metrics aggregator
This question evaluates competency in designing scalable, low-latency real-time stream processing and aggregation systems, covering concepts such as w...
Explain Transformer, GPT vs BERT, and PR metrics
Answer the following conceptual questions: 1. Transformer architecture - Describe the main components of a Transformer block and what each part doe...
Find Intersections Between Two Interval Lists
Find every non-empty intersection between two sorted lists of disjoint closed intervals. Preserve ascending order and correctly include intersections ...
Solve friend recommendations and time-versioned maps
This question evaluates the candidate's ability to design and implement specialized data structures for graph-based friend recommendation logic and ti...
Design a delivery cost dashboard with payments
Design a delivery cost dashboard with payments Object-Oriented Delivery Cost Dashboard Service Goal Design and implement an object-oriented service to...
Implement custom iterators and interfaces
Implement custom iterators and interfaces Define a minimal Iterator interface (e.g., hasNext(), next()) for integers without using IDE-generated scaff...
Interpret p-values and common pitfalls
In a Fraud Data Science interview, you are asked “some p-value questions.” Answer the following in a fraud/experimentation context: 1) Define a p-valu...
Design a ChatGPT-like web chat UI
This English summary evaluates a question that assesses front-end–focused system design competencies such as UI architecture, real-time streaming inte...
Optimize Model Serving Under 200ms
A data science team gives you a trained model and asks you to deploy it as an online inference service. The requirement is that a single prediction mu...
Answer senior behavioral questions
For a senior software engineering interview, prepare strong answers to the following leadership and impact questions: 1. Tell me about a time you infl...
Design a parking lot system
This question evaluates system design competencies such as scalable distributed architecture, real-time state management, data modeling, API design, c...
Explain owning and debugging infra modules
Describe a time you were responsible for a storage/distributed-systems/infra component (or a similarly low-level, reliability-critical module). The in...
Design a replicated cloud storage service
This question evaluates a candidate's system-design competency in distributed cloud storage, covering metadata/data separation, replication models, re...
Design a distributed key-value store
This question evaluates understanding of distributed systems concepts such as data partitioning, replication, consistency models, fault tolerance, sca...
Design Jira bug-to-team classification system
This question evaluates skills in machine learning system design, including supervised classification, feature extraction from textual and log data, l...
Design a game leaderboard service
This question evaluates a candidate's ability to design scalable, low-latency backend systems and distributed data architectures, covering competencie...
Design a rate limiter
This question evaluates a candidate's competency in designing distributed rate limiting systems, covering rate-limiting algorithms, scalability and fa...