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 RAG question-answering system
This question evaluates system design and machine-learning engineering competencies for building Retrieval-Augmented Generation (RAG) systems, includi...
Design an IP Address Filtering Service
Design an IP Address Filtering Service Design a service that decides whether network requests should be allowed or denied based on source or destinati...
Find A Low-Quality Annotator From Label Data
Practice a pandas-style data analysis prompt for identifying a low-quality annotator from label data. The question emphasizes cleaning, agreement or g...
Design Top-K, Crawler, and Chess Systems
This question evaluates system-design competency across scalable distributed services, covering real-time streaming Top-K aggregation, large-scale dis...
Implement Focal Loss for Class-Imbalanced Classification
This question evaluates a candidate's ability to implement a specialized loss function for class-imbalanced classification from basic tensor operation...
Design a Real-vs-Fake DNA Classifier
Question You are given DNA sequences over the alphabet {A, C, G, T}, where sequence lengths may vary. You have: - a small labeled dataset containing b...
Driving a Project Forward Despite Internal Opposition
This question evaluates a candidate's ability to drive initiatives and influence others without formal authority, a core competency in behavioral and ...
Design Sensor Data Processing With AI-Assisted Implementation
Design a system that ingests sensor data, processes it, stores it, and supports queries over the processed results. In the coding round, the candidate...
Explain Logistic Regression, Backprop, and Adam
Walk through the mathematical foundations that connect logistic regression to modern deep-learning training. The interviewer expects you to write the ...
Design a scalable logging system
Design a centralized logging system for a large organization — an internal observability platform (think a self-hosted Splunk / Datadog Logs / ELK) th...
Debug a Broken Transformer
This question evaluates proficiency in debugging and reconfiguring Transformer-based deep learning models, covering competencies in model internals (a...
Design Catalog Update Pipeline
This question evaluates a candidate's ability to design scalable, fault-tolerant catalog update pipelines, including partitioning for horizontal scala...
Discuss a Proud Project, Conflict, Challenge, and Team Advice
Discuss a Proud Project, Conflict, Challenge, and Team Advice Answer the following behavioral questions with distinct, concrete examples where possibl...
Design a Write-Ahead Log Writer with Batch Writes
Design a Write-Ahead Log Writer with Batch Writes Design the low-level behavior of a write-ahead log writer that accepts records from concurrent calle...
Design a Text-to-Video Generation Service
This question evaluates understanding of ML system design, distributed scheduling, durable asynchronous job pipelines, GPU resource orchestration, and...
Design CI/CD Build Caching
This question evaluates design skills around CI/CD build caching, including distinguishing cache types (dependency caches, compiler outputs, container...
Generate a ride map image via POST API
This question evaluates a candidate's competency in geospatial data processing and HTTP API integration, including JSON parsing, coordinate batching f...
Design a Donation Platform
Question Design an online donation platform that lets users discover and contribute to charity campaigns or nonprofit organizations. Payment execution...
Design a multi-carrier parcel delivery system
Design a system for shipping customer parcels that supports multiple delivery partners/carriers (e.g., UPS, USPS, FedEx). Your system should enable an...
Describe Deadline, Mistake, Problem-Solving, and AI Experiences
You are interviewing for a Software Engineer (Intern) role at Amazon, in an on-site loop of two back-to-back 60-minute rounds. Each round mixes a beha...