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 a scalable real-time chat system
System Design: Real-Time Chat (1:1 and Groups) Context Design a mobile-first, globally available real-time chat system that supports both 1:1 and grou...
Build an end-to-end ML classification pipeline
End-to-End Tabular Classification Pipeline (Python) Context You are given a tabular dataset in a CSV file and asked to build an end-to-end machine lea...
Determine string buildability from dictionary
Given a non-empty string s and a list of non-empty words dict, determine whether s can be formed by concatenating words from dict with unlimited reuse...
Plan discovery and adoption strategy
New ML Technique: Discovery Questions and Developer Adoption Plan Context: You are a software engineer preparing to introduce a new ML technique to de...
Find max-score path in weighted DAG
You are given a directed acyclic graph (DAG). Each node v has a score w(v). Each directed edge (u→v) has a nonnegative time cost t(u,v). There is a un...
Schedule dependent services with layered startup
You are given N services and dependency pairs (u -> v) meaning u must start before v. 1) Produce a valid startup order if one exists; otherwise detect...
Plot ASCII chart for time-price pairs
Given an unsorted array of (timestamp, price) integer pairs, write a function to render an ASCII chart of the time series. The x-axis must include eve...
Design speaking scenarios and auth/profile API
System Design Task: Speaking-Scenario Practice Feature + MVP Auth API Context: You are designing a new speaking-scenario practice capability for a lan...
Walk through resume and handle ambiguity
Behavioral Interview Prompt: Resume Walkthrough and Handling Ambiguity (Machine Learning Engineer) Instructions Provide a concise, structured response...
Answer standard behavioral questions
Question Answer the standard behavioral questions asked in an Instacart Software Engineer onsite. Use the STAR framework and make your specific impact...
Explain gap and project contributions
Behavioral/Technical Screen: Recent Work and Project Deep-Dive Context You are in a technical screen for a Software Engineer role. The interviewer wan...
Merge customers and preserve history
Question Implement mergeCustomers(String oldId, String newId) for a payments/ledger platform. The call absorbs oldId into the survivor newId while pre...
Compute probability of drawing reds
Probability of Drawing at Least Two Red Balls Problem A bag contains 6 red balls and 4 blue balls. Three balls are drawn uniformly at random without r...
Deduce position from logic clues
Constraint-Satisfaction on a 2D Grid with Relational Clues Context You are given a rectangular grid with R rows and C columns. A set of named entities...
Count connected delivery zones
Given an m x n grid representing a service area, each cell is either 'Z' (deliverable zone) or '#' (blocked). Two 'Z' cells belong to the same zone if...
Describe past impact and conflict handling
Behavioral and Leadership: AI Function Calling End-to-End + Conflict Resolution Context You are interviewing for a Machine Learning Engineer role. The...
Explain XGBoost depth, regularization, and dropout
ML Conceptual Questions (Onsite) Answer the following: (a) Gradient-boosted decision trees: How does maximum tree depth affect bias/variance, overfitt...
Improve and measure service performance
Assessing and Improving a Service’s Performance Under High Load Context You are responsible for a user-facing, stateless HTTP microservice that handle...
Implement map and render to DOM
Build a Vanilla JS map-like Utility and DOM Renderer Context You are working in a basic browser environment with no frameworks or libraries. Implement...
Implement auth and profile APIs
Design an In-Memory HTTP API for Auth and Profile Management Context Design a minimal, single-node, in-memory HTTP API that supports user registration...