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."
GRPO Deep Dive: Critic-Free RL, Parallelism, MLA, and Reward Design for a Reasoning LLM
This question assesses understanding of reinforcement learning algorithms used to post-train large reasoning language models, including critic-free po...
Design GPU inference request batching
Design a system that serves online model-inference requests on GPUs. Requests arrive one at a time from clients, but GPU throughput is far higher when...
Implement a Range Module with Add, Query, and Remove
Process Range Tracking Operations Implement processRanges(operations) -> queryResults. The tracker is initially empty. Process every operation from le...
Longest Substring Without Repeated Characters
Problem Implement longest_unique_substring(s). Return the longest contiguous substring of s that contains no repeated character. If several substrings...
Consolidate Three Partner APIs into a Query Service
Consolidate Three Partner APIs into a Query Service Design a service that retrieves data from three partner APIs, consolidates their different represe...
Handle an AI-Led Screening Interview
Handle an AI-led screening interview that asks about your background, projects, design thinking, and conflict handling. `hint Hint 1 Start by stating ...
Design a "Future Best-Sellers" Prediction and Recommendation System
Design a "Future Best-Sellers" Prediction and Recommendation System An e-commerce platform wants a new feature on its category pages. A user selects a...
Describe a Failure or Mistake and Its Lasting Lesson
Describe a Failure or Mistake and Its Lasting Lesson Tell me about a meaningful professional failure or mistake. What did you own, how did you respond...
Calculate Monthly Restaurant Sales Growth
Calculate Monthly Restaurant Sales Growth Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables. Schema delivery_...
Compare Logistic Regression and Random Forest in Python
Compare logistic regression and random forest for a binary classification problem implemented in Python. Cover preprocessing pipelines, regularization...
Design a Food-Delivery Backend (Uber Eats-style)
This system design question tests a candidate's ability to architect a large-scale, multi-actor backend involving geospatial matching, real-time data ...
Explain Customer-Focused Technical Work and AI Verification
Answer the following customer-focused engineering questions using concrete examples from your own work. Part 1: Technical Optimization for a Customer ...
Diagnose why a scaled system became slow
This question evaluates proficiency in diagnosing performance regressions in scaled production services, emphasizing observability, bottleneck identif...
Design a Real-Time Chat System
This system design question tests a candidate's ability to architect a scalable real-time messaging platform, focusing on transport protocol selection...
Answer Hiring Manager Behavioral Questions
This question assesses a software engineer's behavioral competencies across three dimensions: technical depth, interpersonal conflict resolution, and ...
Design a Notebook App That Synchronizes Notes
Design a Notebook App That Synchronizes Notes Design a web notebook application in which users can create and edit notes and automatically synchronize...
Design a RAG system with evaluation
Scenario Design a Retrieval-Augmented Generation (RAG) system that answers user questions over a private corpus (internal docs, PDFs, knowledge-base a...
Design Insert/Delete/GetRandom with Weighted Sampling
Design a data structure that supports inserting values, deleting values, and returning a random value. Then extend it so each inserted value has a wei...
Choose the right test for proportions
A/B Test on Delivery Completion Rate (Binary Outcome) Context: You are evaluating an A/B test on a binary metric (delivered_bool). Treat each order as...
Design an A/B test with causal inference
A/B Test Design: Checkout Nudge (Guest-Level Randomization) You own experimentation for an e-commerce checkout flow. You're launching a checkout nudge...