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 trending queries ranking system
This question evaluates the ability to design scalable, low-latency ML-driven systems for detecting and ranking trending queries, covering competencie...
Assess Cultural Fit and Self-Reflection in Hiring Process
Behavioral Interview: Cultural Fit and Self-Reflection In a Pinterest Data Scientist onsite loop, hiring-manager and cross-functional panels may use p...
Measure Billboard Campaign Effectiveness and Engagement Quantification
Measure Billboard Campaign Effectiveness and Engagement Quantification A consumer social platform places billboards in train stations to drive traffic...
Explain benefits of a lockfile
When running a JavaScript app using package managers like npm or yarn, what is the purpose of a dependency lockfile (e.g., package-lock.json or yarn.l...
Design Historical Visit Tracker
This question evaluates design of in-memory data structures and event-processing APIs, focusing on efficient state maintenance for historical timestam...
Return a valid course completion order
You are given an integer n representing n courses labeled 0..n-1 and a list of prerequisite pairs prerequisites, where each pair [a, b] means you must...
Convert stack samples to trace events
Question Implement convertToTrace(samples) that, given a chronologically ordered vector of stack samples (each sample contains a timestamp and a call-...
Solve Morse and Network Access Tasks
Solve the following two independent coding problems. Problem 1: Convert Between Text and Morse Code You are given the standard Morse-code mapping for ...
Design a Synchronous Text Classification API
Design a Synchronous Text Classification API A trained machine-learning model classifies text. Design the system that exposes this model through synch...
Find Minimum Processing Rate
This question evaluates algorithmic problem-solving skills, discrete mathematics involving integer division and ceiling operations, and complexity ana...
Return Top Department Suggestions
This question evaluates proficiency in prefix-based search and top-k ranking, familiarity with in-memory data structures and preprocessing strategies,...
Design a grounded voice assistant
This question evaluates understanding of grounding strategies for large language models, causes and mitigation of hallucinations, response quality eva...
Getting Unblocked When Your Tech Lead Won't Help
This behavioral question assesses a software engineer's self-direction, ownership mindset, and professional communication when navigating organization...
Design a Resilient Document Aggregation Service
This system design question tests a candidate's ability to architect a fault-tolerant, high-throughput data aggregation service involving concurrent d...
Highest Salary Using Java Streams
This question tests a software engineer's practical proficiency with the Java Stream API, specifically the ability to perform aggregate operations on ...
Describe leadership scope and impact
Behavioral & Leadership: Largest Scope You Have Led Context You are interviewing for a software engineering role. The interviewer is assessing your ab...
Demonstrate culture fit and leadership
Behavioral & Leadership — Machine Learning Engineer (Onsite) Instructions Answer concisely using the STAR framework (Situation, Task, Actions, Results...
Build and troubleshoot image classification and backprop
Build and troubleshoot image classification and backprop CIFAR-like Noisy Dataset: Baseline, Data Quality Plan, and First-Principles Backprop Context:...
Discuss Ownership, Learning, Trust, Scope, and Delivery
Discuss Ownership, Learning, Trust, Scope, and Delivery Prepare evidence-based behavioral answers about ownership, learning, thinking broadly, earning...
Explain GPS positioning and errors
Explain how GPS works at a high level. Your answer should cover how satellites and a mobile receiver estimate location, how signal propagation time is...