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."
Deep dive a technical project and its impact
Describe one technical project you led or significantly contributed to (DS/analytics/ML/engineering). The interviewer wants both a high-level story an...
Evaluate shift from branch to digital channel
Business case: OneMain credit card — branch vs. digital acquisition OneMain runs a credit-card business with two acquisition/servicing flows: - Tradit...
Implement Social Follow Recommendations
This question evaluates graph data structure design and traversal, set-based aggregation and ranking logic, and the ability to justify data structure ...
Explain RF/analog IC interview fundamentals
Explain RF/analog IC interview fundamentals You are interviewing for an RF/analog IC design role. Answer the following conceptual questions (no code r...
Choose and Explain a Classical Hypothesis Test
Choose and Explain a Classical Hypothesis Test Explain null and alternative hypotheses, significance level, p-value, Type I error, and Type II error. ...
Design log management with auto-deletion
Design log management with auto-deletion Design a Bounded Log Management System with O(1) Victim Selection Context You are designing an in-memory log ...
Interpret AUC Values and Handle Class Imbalance Techniques
Interpret AUC Values and Handle Class Imbalance Techniques AUC and Class Imbalance in Binary Classification Context You are evaluating a binary classi...
Diagnose Low CTR in an Advertising Campaign Funnel
Diagnose Low CTR in an Advertising Campaign Funnel An analysis has flagged several ad campaigns because their click-through rate (CTR) is below the av...
Compute minimum added stones to balance a tree
This question evaluates competency in tree algorithms, subtree aggregation, and integer resource balancing by requiring reasoning about hierarchical s...
Join Tables and Rank Users
You are given two analytics tables: - users(user_id, country, signup_date) - listening_events(event_id, user_id, played_at, minutes_played) Because th...
Find Conflicting Events
This question evaluates algorithmic problem-solving in coding and algorithms, focusing on grouping, sorting, and sliding-window techniques applied to ...
Kth Largest Perfect Binary Subtree
This question evaluates a candidate's ability to combine tree traversal with structural validation, requiring recognition of perfect binary subtrees a...
Diagnose and Validate a Regression Model
You fit a regression model to predict a continuous outcome. The headline error metric looks acceptable, but the team asks whether the model is trustwo...
Discuss team fit and leadership with manager
Discuss team fit and leadership with manager Behavioral Interview Prep: 30‑Minute Hiring Manager Conversation (Software Engineer) Context You are prep...
Design a Scalable Product Authentication Platform
Design the authentication infrastructure for a cloud product. Users log in with email and password; the design should be able to add external identity...
Explain overfitting and how to prevent it
You are asked rapid-fire ML fundamentals questions. 1. What is overfitting? Explain it in terms of training vs. validation performance and generalizat...
Compute Sentence Similarity
Given two text inputs, design and implement a method to compute their semantic similarity. You may use either of the following approaches: 1. Encode e...
Rearrange array to maximize positive prefix sums
This question evaluates array manipulation, prefix-sum reasoning, and greedy/combinatorial optimization skills for maximizing a permutation-based metr...
Implement a React flag loader with typewriter effect
Scenario You are given a small React + TypeScript project with a Mocha test runner (and an autograder). The task is a practical front-end mini-project...
Design a Test Orchestration System
Design a test orchestration service for an engineering organization. The service should let users define different kinds of tests, schedule when they ...