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 Parallel Image Processor
This question evaluates understanding of parallel and process-based concurrency, batch image-processing pipelines, transform correctness, and per-job ...
Solve Grid Path and Graph Sampling
This question evaluates graph algorithms and probabilistic/combinatorial reasoning, covering multi-criteria shortest-path optimization (minimizing tra...
Implement Recipe Storage CRUD
Implement an in-memory RecipeStore that supports CRUD operations for recipes. Each recipe contains: - id: a string identifier in the form recipe<n> - ...
Solve substring and worker assignment
The interview included two algorithm problems: 1. Shortest covering substring: Given two strings s and t, return the shortest contiguous substring of ...
Compute Products Excluding Each Index
You are given an integer array nums of length n. Return an array answer such that answer[i] equals the product of every element of nums except nums[i]...
Design a Randomized Multiset
Implement a data structure for integers that allows duplicate values and supports the following operations in expected O(1) time: - insert(val): Add o...
Merge Sorted Arrays In Place
You are given two non-decreasing integer arrays. - A has length m + n. - The first m elements of A are valid sorted numbers. - The last n elements of ...
Simulate Plant Infection With Controlled Burning
You are given an R by C grid of plants. Each plant is initially healthy, infected, recovered, or dead. A plant has up to four orthogonal neighbors. De...
Validate bracket sequence
Given a string s containing only the characters (, ), [, ], {, and }, determine whether the brackets are properly matched. A string is valid if: - Eve...
Solve Knight and Reversal Problems
The online assessment contained two coding problems: 1. Generalized knight shortest path: Given an integer n, consider an n x n chessboard with coordi...
Implement URL Shortening Codec
Implement a small in-memory URL-shortening component in a pair-programming interview. Expose two methods: shorten(long_url: str) -> str, which returns...
Count User Journey Prefixes
This question evaluates the ability to reconstruct per-user action sequences from timestamped logs, aggregate and count path prefixes, and apply data-...
Write an average-income function
This question evaluates proficiency in data manipulation and basic statistical aggregation, particularly handling missing values and computing average...
Minimize deaths in spreading plant infection
This question evaluates a candidate's ability to model and simulate dynamic grid processes, reason about infection propagation and delayed state chang...
Build a Fuzzy Keyword Index
This question evaluates string-processing, text-indexing, approximate string-matching, and data-structure design skills for supporting many repeated q...
Implement Linear Regression Training
This question evaluates understanding of linear regression, mean squared error loss, gradient computation, parameter updates, and proficiency with vec...
Find and Merge Camera Alert Intervals
You are given surveillance camera readings as time-series data. Each reading is a pair (timestamp, value), sorted by timestamp. A camera is considered...
Maximize Profit From Cutting Rods
This question evaluates algorithmic optimization and discrete cost-benefit analysis, testing skills in integer parameter exploration, profit modeling,...
Implement array parity and tree level views
This question evaluates proficiency in array frequency analysis and binary tree traversal, testing skills in data structures, correctness reasoning, a...
Fixed-Width Text Display
Fixed-Width Text Display You are building a text display that renders a sequence of words inside a viewport of a fixed character width maxWidth. The d...