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."
Implement sequential and parallel URL requests
This question evaluates proficiency in HTTP networking, asynchronous and parallel programming (promises/futures), deduplication and order preservation...
Design query pagination for large datasets
This question evaluates a candidate's understanding of pagination strategies, cursor/keyset design, SQL query formulation, consistency guarantees unde...
Implement short algorithms on logs, grids, and strings
This multi-part Coding & Algorithms question evaluates algorithmic problem-solving skills and mastery of core competencies including temporal window r...
Compute Earliest Completion Times
You are given n tasks numbered from 0 to n - 1. Each task i has a positive duration duration[i]. You are also given a list of prerequisite relationshi...
Why do transformers struggle with long context?
In a transformer-based model, why is it difficult to process very long input context? Explain the main challenges in terms of computation, memory usag...
Analyze food-delivery data
Analyze food-delivery data You are given data for a food-delivery platform: a set of restaurants (each with a menu of items and prices, plus a geograp...
Explain Shell Script for Python Virtual Environment Setup
Explain Shell Script for Python Virtual Environment Setup Scenario Shell script for setting up a Python virtual environment during a tech screen Quest...
Design load balancing, caching, and idempotent APIs
You are designing a backend service that will be deployed across multiple instances behind a load balancer. Answer the following: 1) Load balancing - ...
Explain sync/async, Go concurrency, SQL vs NoSQL
You are interviewing for a backend engineering role. Answer the following conceptual questions clearly and with concrete examples. 1) Synchronous vs a...
Collaborate with PM and Eng as DS
Question As a Data Scientist working with Product Managers and Engineers: 1. How do you structure collaboration (requirements, timelines, ownership)? ...
Prioritize competing engineering requests
Scenario You are a Data Scientist/Analytics partner supporting multiple engineering teams. Two (or more) teams simultaneously ask you to prioritize th...
Implement a Connection Pool
You are given an existing DBConnection class that simulates a physical database connection. It exposes the following methods and must not be modified:...
Design A Low-Latency Product Price Update API
Design an API and serving system for product prices. Each product price is updated at most once every 24 hours, but the product launch page needs low-...
Code Editor with Block Shrink and Expand (Code Folding)
Implement the core of a code editor (similar to VS Code) that supports code folding: collapsing ("shrink") and restoring ("expand") indentation-based ...
Explain your career path and leadership impact
Context: This is a hiring-manager behavioral screen for an Engineering Manager / Tech Lead–type role. Answer the following prompts clearly and concret...
Design a file search module like UNIX find
Design Task: Object-Oriented module that mimics UNIX find Context Design an object-oriented library that replicates the core functionality of the UNIX...
Design ML system for self-driving perception
This question evaluates understanding of end-to-end ML system design for on-vehicle obstacle detection and collision avoidance, encompassing sensor fu...
Quantify impact of your projects using STAR
Interview-style behavioral prompt: "Pick one or two of your impactful projects and walk me through them in detail. Focus on what you did and how you m...
Design a large-scale ticketing system
Design an online ticketing system similar to Ticketmaster that supports very high concurrency for popular events where many users try to purchase tick...
Design a near-real-time weather API
Question Design a weather data platform that retrieves best-effort hourly dumps from an external Weather Service API for approximately 2,000 locations...