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."
Describe algorithm to find function maximum
This question evaluates understanding of gradient-based optimization and numerical methods for locating extrema, assessing competency in interpreting ...
Compute maximum non-overlapping meetings
Assume you are given a list of meeting time intervals for a single person. Each meeting i is represented by a pair of integers [start_i, end_i], where...
Sum numbers formed by root-to-leaf paths
You are given the root of a binary tree where each node contains a single digit from 0 to 9. Each root-to-leaf path represents a number obtained by co...
Parse payroll file and answer queries
You are given a payroll "file" as a StringIO (file-like) object in Python. The underlying text represents manually-entered payroll data. Assume the fo...
Compute trigger counts in a DAG
You are given a directed acyclic graph (DAG) that represents trigger dependencies between tasks. - Each node represents a task. - There is exactly one...
Explain debugging methodology for production issues
In a technical interview, you are asked: > What is your methodology when debugging or when something goes wrong? Describe a systematic approach you wo...
Describe experience performing code reviews
During the interview, you are asked: > Have you ever done any code reviews? If yes, the interviewer may follow up with questions about how you review ...
Explain technical details of a past project
After you give a high-level overview of a recent project, the interviewer follows up with: > Can you walk me through the technical details of this pro...
Find linked user records by similarity
You are given a list of user records. Each record has the following fields: - id (integer, unique) - name (string) - email (string) - company (string)...
Design backend for Uber-like ride-hailing service
Design the backend system for a ride-hailing platform similar to Uber. Focus on: - How ride requests are placed and matched with drivers ("order takin...
Compute city skyline outline
You are given a list of rectangular buildings in a 2D city skyline. Each building is represented by three integers [L, R, H]: - L: the x-coordinate of...
Maximize revenue from inventory sales
Problem A store has n different products. For each product i (0-indexed), you are given an integer quantity[i] representing how many units of that pro...
Track simulations and report timeouts
You are implementing a monitoring component for many concurrent simulations. Each simulation produces a stream of event objects of the form: - sim_id ...
Shuffle array using random integer API
You are given an array nums of length n representing a deck of distinct cards. You do not have access to a built-in shuffle function, but you are give...
Find user pairs with overlapping last K movies
You are given the same user movie-watching histories as in the previous problem. Each user’s history is an ordered list of movie IDs from earliest to ...
Detect cycle in directed dependency graph
You are given a directed dependency graph representing services in a system. - There are n services, labeled from 0 to n - 1. - You are given a list o...
Find common active intervals across cameras
You are now processing data from multiple security cameras. You are given: - An integer N, the number of cameras. - A threshold value T (a real number...
Compute median of two sorted arrays
You are given two sorted arrays of integers nums1 and nums2. - nums1 has length m, nums2 has length n. - Both arrays are sorted in non-decreasing orde...
Find shortest path in a grid with obstacles
You are given a 2D grid of size m x n representing a maze. Each cell in the grid is either empty (0) or blocked (1). You are also given two coordinate...
Design an online coding platform
Design an online coding practice and interview platform (similar to well-known coding challenge sites). The platform should allow: - Users to sign up,...