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."
Define Product Health and Experiment Design
This question evaluates competency in product analytics and experimentation, covering metric framework design, trade-offs and guardrail selection for ...
Return Binary Search Tree Values in Ascending Order
Return Serialized BST Values in Ascending Order Implement ascendingBstValues(levelOrder) -> values. levelOrder is a JSON-compatible array containing s...
Query Top Played Tracks Globally And By Country
Given a play_events table with columns user_id, track_id, timestamp, and country, write SQL to return the top N most played tracks globally and the to...
Aggregate Recent Message Events And Active Chats
Prepare for a stateful event aggregation coding prompt over chat events and active chats in a rolling five-minute window. The question is useful for d...
Advance Cyclic Ball Flips Efficiently
Determine ball colors after many synchronized marker moves around a circle, where marked positions flip before advancing. Derive an O(n + m) parity so...
Prepare for a Frontier AI Recruiter Screen
This question evaluates mature judgment, technical leadership, communication, and the ability to articulate mission alignment along with layered risk ...
Design a Priority Task Executor with Duplicate Task IDs
Design a Priority Task Executor with Duplicate Task IDs Design an in-memory component with two operations: - addTask(taskId, priority, timestamp) reco...
Design Publisher Configuration Rules
Design a supply-side advertising configuration system that manages publisher-specific rules. A publisher may own many websites, mobile apps, channels,...
Build a Paginated Provider Search Backend and React Filter UI
Build a Paginated Provider Search Backend and React Filter UI Implement a small full-stack search feature. A React page displays provider records from...
Detect Recent Duplicate Records with Bounded Memory
Detect Recent Duplicate Records with Bounded Memory A time-ordered stream contains records [id, text, title, timestamp]. Detect records whose exact (t...
Implement a Byte Pair Encoding (BPE) Tokenizer
This question evaluates practical understanding of tokenization algorithms and string processing, specifically the iterative merge-based approach used...
Implement a Safe Average Function in Python
Write a Python function average(table) that returns the arithmetic mean of a list of numbers and returns 0 when the list is empty. Explain the functio...
Design a chatbot over structured and unstructured data
This question evaluates a machine learning engineer's ability to design end-to-end systems that integrate structured and unstructured data, testing co...
Design a Recipe and Inventory Ordering Service
Design a Recipe and Inventory Ordering Service Scenario Design an object-oriented service with recipes, supplies, and orders. A recipe has a unique na...
Design a personalized news aggregator
Design a Google News-style personalized news aggregator. The system continuously collects articles from many third-party publishers by polling their A...
Design a Perishable-Goods Inventory and Location Tracking System
This system design question evaluates the ability to architect a location-tracking and inventory service for perishable goods across a distributed ret...
Design a balloon stability tracker
Implement a class BalloonFestival to manage hot-air balloons and wind fields over time, and to report rewarded balloons at inspection times. Methods a...
Design Travel Page Data APIs
A travel advisory company is launching a customer-facing product experience for browsing and requesting travel services. You are given mockups for thr...
Settle debts with minimal transactions
You are given a list of debts among a set of people, expressed as triples (debtor, creditor, amount) (equivalently (payer, payee, amount)), where each...
Design GenAI Fine-Tuning and Agent Tradeoffs
This question evaluates competency in generative AI fine-tuning techniques and production agent architecture, including trade-offs among full-precisio...