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."
Explain and Harden Two Shell Commands
Explain and Harden Two Shell Commands Explain the behavior, operator semantics, and failure risks of these shell commands: `sh ps aux | grep foo | gre...
Refactor a Chatbot into Clean Object-Oriented Components
Prepare for a OpenAI software engineering interview question about refactor a chatbot into clean object-oriented components. The prompt highlights pra...
Implement Stable Sigmoid, Softmax, and Scaled Dot-Product Attention
Implement Stable Sigmoid, Softmax, and Scaled Dot-Product Attention Implement the mathematical core of three common neural-network operations without ...
Rank Newly Launched Ads Under Cold Start
Rank Newly Launched Ads Under Cold Start Design a ranking model dedicated to ads launched within the last seven days, where direct performance history...
Design a Population-Weighted Random Country Picker
Design a Population-Weighted Random Country Picker Design a class initialized with country names and positive population weights. Each call to pick() ...
Design the Control Plane for a Compute Cluster: Host Monitoring + Job Dispatch
This question assesses the ability to design a distributed control plane that tracks live host state across a large compute fleet under high write con...
Design a Discord-Style Communication Platform
Design a Discord-Style Communication Platform Design a communication platform with organizations, channels, direct messages, and real-time text delive...
Design a Usage-Based Credit Tracking System for a SaaS Platform
This question evaluates a candidate's ability to design a distributed metering and billing system that tracks account balances, authorizes consumption...
Explain Lazy Loading and Frontend Code Splitting
Explain Lazy Loading and Frontend Code Splitting A single-page application has grown until its initial JavaScript bundle delays interactivity. Explain...
Solve Timed Logical and Quantitative Reasoning Cases
Solve Timed Logical and Quantitative Reasoning Cases Work through the seven short assessment cases below. For each reasoning case, use only the stated...
Implement and Defend an AI-Assisted Repository Change
Implement a feature in an unfamiliar repository with AI assistance while remaining able to explain and defend every change. Record prompts, respect re...
Design a Text-to-Video Generation System
Design a Sora-like text-to-video generation platform. Users submit a text prompt, optional generation settings (duration, resolution, fps, seed, model...
Maximize Valid Trains from Shared Equipment
You have a pool of locomotives and railcars. Partition any subset of them into valid trains while using each locomotive and railcar at most once. A va...
Project Deep Dive + Core-Values Behavioral Round
This behavioral and leadership interview question evaluates a software engineer's ability to demonstrate genuine technical ownership through a deep di...
Debug a GRPO training loop and explain ratios
You are given a simplified implementation of a GRPO (Group Relative Policy Optimization) training step for an RLHF-style policy model. The training is...
Machine Learning Fundamentals: Optimizers, Scaling Laws, and Clustering
This question evaluates conceptual grasp of core machine learning fundamentals: gradient-based optimizers, neural scaling laws, and unsupervised clust...
Design a Synchronized Watch Party System (LLD)
Design a Watch Party system that lets a host create a virtual room and have multiple users join — via a unique Room ID — to watch the same video conte...
Describe Your Analysis and Visualization Toolkit
Give a recruiter-friendly overview of the data-analysis and visualization tools you use in your work. Explain what each tool helps you accomplish, how...
Design an LLM Agent System That Automatically Resolves Jira Tickets and Opens Pull Requests
This ML system design question evaluates the ability to architect an autonomous LLM-agent pipeline spanning retrieval-augmented generation, tool integ...
Design a Security Monitoring Framework
This question evaluates a candidate's understanding of designing security monitoring frameworks for cloud infrastructure, covering competencies in sys...