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."
Defend the Complexity and Scalability of a Project
Defend the Complexity and Scalability of a Project Prepare a project deep dive in which the interviewer repeatedly challenges what was technically dif...
Explain motivation for QA and career goals
Questions Answer the following as if speaking to a hiring manager: 1. Where do you want to develop your career in the next 2–5 years, and why? 2. Why ...
Design several backend components
This set of prompts evaluates backend system design, API and data-modeling skills, low-level software architecture, and competencies in consistency, c...
Implement stream queries and bounded-difference subarrays
This question evaluates proficiency in data structures and algorithmic problem-solving, covering streaming uniqueness tracking (first-non-repeated ele...
Implement a Credit API Workflow
You are given documentation for a sandbox credit-management API. The documentation describes API operations for creating an account, adding credits, c...
Build a Reliable Streaming Chat UI
You are building a React-based chat interface where assistant responses stream into the UI token by token in real time (the same UX as a typical LLM c...
Design a Parking Garage Object Model
Design an object-oriented model for a multi-level parking garage. The garage should support: - Multiple floors and parking spots. - Different vehicle ...
Compute Parking Clustering Probability and P-Value
This question evaluates combinatorial probability and hypothesis-testing skills, specifically counting-based calculation of exact probabilities under ...
Design an RBAC Relational Schema
This question evaluates relational schema design and access-control modeling skills by testing understanding of RBAC concepts (users, roles, permissio...
Present and critique an airline delay analysis
Predicting Airline Departure Delays — Technical Screen Prompt Context You have 15 minutes to review a slide deck on predicting airline departure delay...
Maximize distinct values after unique ± offsets
This question evaluates combinatorial reasoning and algorithmic optimization skills, focusing on transforming arrays under distinct integer-offset con...
Design an ads event reporting system
This question evaluates a candidate's ability to design scalable, reliable event ingestion and analytics systems, testing competencies in distributed ...
Design a Figma-like collaborative editor
System Design: Collaborative design editor (Figma/Google Docs style) Design the backend (and key client interactions) for a real-time collaborative de...
Design real-time kitchen order fulfillment system
Backend Engineering Challenge: Real-time order fulfillment Design and implement (conceptually) a single-process, real-time backend system for fulfilli...
Implement a Time-Aware Task Manager
This question evaluates the ability to design and implement in-memory data structures and algorithms for time-aware state management, including per-us...
Solve three algorithmic OA problems
This is an online assessment (Codility-style, 150 minutes) consisting of three independent coding problems. Solve each one separately; they do not sha...
Implement CRUD API and tests
You are given two software-engineering tasks. 1. Implement a simple REST API for a resource such as Note or Message. - Support basic CRUD operation...
Design a Multi-Agent Document Search and Visualization Product
Design a Multi-Agent Document Search and Visualization Product Design a document-analysis product that searches PDF content, extracts figures and tabl...
Design a multi-tenant quota system
Design a Global Multi-Tenant Quota Service (Single Global Quota per User) Context Multiple upstream products (e.g., Drive, Photos) share a single glob...
Design a resilient dasher payment system
Question Design an end-to-end payment system for DoorDash delivery drivers (Dashers) that computes payouts from order/delivery lifecycle events. The e...