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."
Implement a Paginated Medical-Record Filter Without Guessing an Ambiguous Rule
Implement a Paginated Medical-Record Filter Without Guessing an Ambiguous Rule You are given a paginated HTTP endpoint that returns medical records. E...
Build a Custom CompletableFuture: Async Primitive and Parallel Array Processing
You are asked to design and implement, from scratch, a simplified asynchronous "future / promise" abstraction in the spirit of Java's CompletableFutur...
Build and Defend a Baseline Model from a CSV
You receive a CSV during a live interview and are asked to build a useful predictive model. You may use code-completion or agent tools, but you must d...
Design a Multi-Dimensional Job Rate Limiter
Design a Multi-Dimensional Job Rate Limiter Design and implement a rate limiter for jobs. A decision may depend on the job's effort, a per-user limit,...
Debug Validation Error Aggregation
This question evaluates debugging, error-handling, and message-normalization skills in Python schema-validation libraries, focusing on aggregation of ...
Determine Whether an Integer Is a Palindrome
Determine Whether an Integer Is a Palindrome Implement is_palindrome_number(value). Return true when the base-10 digits of a non-negative integer read...
Design ad frequency capping
Design an Ad Frequency Capping System Design a frequency capping system for an advertising platform. The system must ensure that a user does not see t...
Review a Compact GPT-Style Transformer Implementation
Review a Compact GPT-Style Transformer Implementation You are reviewing a compact decoder-only Transformer implementation intended for next-token lang...
Wrap a Fixed-Chunk Stream Reader with Arbitrary-Length Reads
You are given a low-level stream API that reads exactly 4096 bytes at a time. Design a wrapper API read(n) that returns any requested number of bytes,...
Solve Probability and Logic Puzzles Under Interview Pressure
Solve a set of interview puzzles: estimate the probability of seeing at least one car in a half hour when the one-hour probability is 0.99; compute ho...
Demonstrate Customer-Centric Judgment About AI
Demonstrate Customer-Centric Judgment About AI Describe one real situation in which you had to decide whether or how to use an AI capability in a cust...
Maximize Fixed Positions After Deletions
Given an integer array a, delete zero or more elements while preserving the relative order of the elements that remain. Let the resulting array be b, ...
Scope and Design a Restaurant Scheduling System
Scope and Design a Restaurant Scheduling System The initial prompt is simply “design a restaurant scheduling system.” Begin by distinguishing three pl...
Hiring-Manager Behavioral Round: Impact, Conflict, Cross-Functional Work, and Influencing Without Authority
This hiring-manager behavioral round evaluates a software engineer's leadership, collaboration, and influence competencies through structured STAR sto...
Calculate the Monthly Share of High-Frequency Customers
Calculate the Monthly Share of High-Frequency Customers Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables. Sc...
Design a Smooth Per-Customer Calls-Per-Second Controller
Design a Smooth Per-Customer Calls-Per-Second Controller Design a service that controls outbound calls for many customers. Each customer has a configu...
Measure Customers Ordering from Bottom-Quartile Restaurants
Measure Customers Ordering from Bottom-Quartile Restaurants Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables...
Design A Real-Time VWAP Analytics Provider
Study a real-time market data system design problem for computing VWAP from high-volume trade ticks across many exchanges. The prompt covers feed hand...
Implement a Followable Microblog Timeline
Implement a Followable Microblog Timeline Design an in-memory microblog service with these operations: `text post(user_id, tweet_id) follow(follower_i...
Handle Difficult Feedback and Manager Disagreement
Answer the following leadership questions with examples in which your choices materially affected the outcome. Do not reuse the same story unless the ...