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."
Solve Throughput, Rate Limiting, and LFU
This set of tasks evaluates algorithmic problem-solving, data structure design, and systems-oriented reasoning by testing throughput calculation, roll...
Implement an In-Memory File System
Design an in-memory file system that supports file management, search, user ownership, capacity limits, copying, and compression. Each file has a uniq...
Solve two online assessment problems
This two-part prompt evaluates algorithmic problem-solving skills: the first problem tests optimization under index-based movement and number-theoreti...
Make a Parentheses String Valid
Given a string s containing lowercase English letters and the characters '(' and ')', remove the minimum number of parentheses so that the resulting s...
Solve Four Online Assessment Problems
Complete the following four independent coding tasks. For each task, write a function that returns the requested result. 1. Find the best value index ...
Solve Three Algorithmic Tasks
You were asked three coding problems: 1. Count events inside a time window - You are given an initial collection of event timestamps in HH:MM:SS fo...
Find Minimum Time Across a Grid
This question evaluates algorithm design and problem-solving skills related to grid-based reachability with time-dependent constraints, assessing the ...
Find Maximum Envelope Nesting
This question evaluates algorithmic problem-solving skills, particularly reasoning about multi-dimensional ordering, sequence optimization, and time-c...
Design body camera checkout system
This question evaluates competency in in-memory data structure design, algorithmic complexity (achieving O(1) average operations), and randomized reso...
Merge Weekly Time Intervals
You are given a list of time intervals within a single week. Each time is written as a day-of-week plus a 24-hour clock, for example Sat 13:00 or Mon ...
Implement Calendar Layout and String Packing
The interview reportedly included two separate coding exercises: 1. Day-view calendar layout - You are given a list of events for a single day. Eac...
Match Bookings to Payments
You are given two unsorted lists: - bookings: each record contains at least a unique booking_id - payments: each record contains at least a booking_id...
Determine Straight Flush
This question evaluates competency in algorithmic pattern detection and data-structure manipulation applied to domain-specific representations, focusi...
Count Islands in a Grid
This question evaluates skills in graph traversal and grid connectivity detection, testing competency in reasoning about adjacency, state management, ...
Implement Order Modification Feature
You are given an existing C++ trading system with a client/server architecture. The current system already supports two request types: - AddOrder(orde...
Check connectivity between two subway stations
You are given a description of subway stations A, B, C, D, E, ... as a graph. For each station, you are told which other stations it directly connects...
Maximize Earnings by Converting Days Off into Workdays
Maximize Earnings by Converting Days Off into Workdays An employee is planning a work schedule for n consecutive days. For day i you are given whether...
Design an Editable Text Buffer
This question evaluates data structure design, mutable state management, undo/redo semantics, and prefix-based autocomplete indexing with dynamic freq...
Debug Queues and Solve Arrays
This multi-part question evaluates competencies in data structures (heap invariants and in-place array manipulation), concurrent programming (designin...
Implement weighted random choice
This question evaluates understanding of weighted random sampling, probability distributions, input validation, and algorithmic time and space complex...