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."
Recommend movies by shared ratings
Recommend movies by shared ratings Write a function recommendations(user, ratings) that returns a list of movies to recommend to the given user based ...
Apply sliding window techniques
Apply sliding window techniques Explain the sliding window technique and apply it to solve: ( 1) Given an array of positive integers and a target S, r...
Compute binary tree diameter
Compute binary tree diameter Given the root of a binary tree, compute the tree's diameter defined as the maximum number of edges on any path between t...
Implement two array-cost minimization algorithms
Implement two array-cost minimization algorithms that appeared back-to-back in an AWS SDE online assessment. Each can be solved independently. Part 1 ...
Count users over n connections
Count users over n connections Given a stream of relationship events in the form [[user_a, user_b, op], ...], where op ∈ {"connect", "disconnect"}, tr...
Design image upload end-to-end
Design image upload end-to-end System Design: End-to-End Image Upload Pipeline Context Design an end-to-end system that handles user picture uploads f...
Find power-of-two subarrays within sum range
Find power-of-two subarrays within sum range Given an integer array nums and an integer k, find all subarrays whose length is a power of two and whose...
Sort a string by custom order
Sort a string by custom order Given a priority string P of distinct characters and a text string S, reorder S so that all characters appearing in P co...
Design Minesweeper and Optimize Click Performance
Design a Minesweeper game. At game start, initialize an m×n board by randomly placing k bombs. Implement: ( 1) printBoard(): return a human-readable s...
Minimize sum with halving operations
Minimize sum with halving operations You are given an array of non-negative integers nums and an integer k. In one operation, choose any index i and r...
Find buildings with rightward view
Find buildings with rightward view You are given an array of building heights aligned along a street that faces the ocean to the right. Return the ind...
Decide palindrome within k deletions
Decide palindrome within k deletions Given a string s and integer k, decide whether s can be transformed into a palindrome by deleting at most k chara...
Describe std::string copy semantics
Describe std::string copy semantics In C++, what happens with std::string when you write: std::string a = "123"; std::string b = a; Describe which ope...
Compute optimal locker placement with obstacles
Compute optimal locker placement with obstacles Given house coordinates H = {(xi, yi)} and tree coordinates T = {(xj, yj)} on a 2D integer grid, choos...
Compute minimum time with task cooldowns
You are given a multiset of task types represented by uppercase letters (e.g., A, A, A, B, B, C). Each task takes exactly 1 time unit to execute. Runn...
Solve matrix rotation and 1-D illumination
Question LeetCode 48. Rotate Image – rotate an n×n matrix 90° clockwise (extra space allowed). Find the point(s) with the maximum number of illuminate...
Solve message splitting and board crushing
Question LeetCode 2468. Split Message Based on Limit – Given a message string and a per-line width, split it into parts adding the suffix "<i/n>" (e.g...
Delete duplicate files via DFS
Question LeetCode 609. Find Duplicate File in System – Implement an algorithm (using DFS/backtracking) to delete files with duplicate content in a fil...
Solve stock trading with pattern rules
Question Given an array of daily stock prices and two pattern arrays: sellPattern and buyPattern, each consisting of 1 (price up) and -1 (price down) ...
Expand algebraic expression with distribution
Question Given an expression of lowercase letters, '+', '', and parentheses with no '+' outside any parentheses, return an equivalent expression conta...