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 disk space manager with eviction
Design and implement an in-memory disk space manager that stores datasets by datasetId with a given size (e.g., in MB). The manager has a fixed total ...
Maximize sum of non-adjacent values
Problem You are given an integer array nums representing the amount of money available at each house along a street. If you take money from house i, y...
Compute minimum rooms for time intervals
You are given a list of meeting time intervals, where each interval is represented as [start, end) (start time inclusive, end time exclusive) and star...
Solve DFS grid and keypad problems
You may be asked to solve one or more DFS/backtracking problems: 1. Grid connectivity problem: Given an m x n grid where 1 represents land and 0 repre...
Compute minimum rooms for meeting schedule
This question evaluates a candidate's competency in interval-based scheduling and resource allocation, assessing understanding of overlapping time int...
Detect fraud events and extract PII
This question evaluates skills in parsing nested event data, extracting and deduplicating PII fields, and performing key-based correlation to detect r...
Check and infer custom alphabet
You are working with an unknown language that uses a custom alphabetical order, such as ['a', 'd', 'c', 'b', ...]. Implement the following: 1. Check s...
Model Driver Acceptance Probability
This question evaluates a candidate's competency in production machine learning system design and operationalization, including label definition and u...
Implement FizzBuzz
This question evaluates a candidate's ability to implement basic control flow, use modulo operations, iterate over sequences, and reason about time an...
Find Smallest Common Row Value
You are given a 2D integer matrix where each row is sorted in strictly increasing order. Return the smallest integer that appears in every row. If no ...
Parse and expand an IPv6 address
Implement an IPv6 address parser/normalizer. You are given a string s that may represent an IPv6 address using standard notation: - Up to 8 groups (“h...
Find degrees of connection in a LinkedIn graph
You are given an undirected graph representing professional connections: - n people labeled 0..n-1 - a list of undirected edges connections, where (a,...
Compute the Eddington number from ride distances
Given a list of positive integers distances, where distances[i] is the distance traveled on day i, compute the cyclist’s Eddington number E: E is the ...
Traverse an Org Chart by Level
You are given an organization's reporting structure as a flat list of employee-manager relationships. Exactly one employee is the root (the CEO) and h...
Implement lossless dictionary encoding and decoding
Dictionary encoding is a lossless compression technique for a list of tokens. You are given an input string consisting of words separated by commas, e...
Implement a Database Connection Pool
This question evaluates skills in concurrent resource management, synchronization primitives, and robust connection lifecycle handling within database...
Find Kth Smallest in BST
You are given the root of a binary search tree and an integer k. Return the value of the node that would appear in the kth position if all node values...
Serialize Expression Tree Minimizing Parentheses
This question evaluates proficiency with binary expression trees, operator precedence and associativity, and the ability to serialize an abstract synt...
Implement an LRU cache
Design a key-value cache with a fixed capacity. It must support: - get(key): return the value for the key if it exists, otherwise return -1. - put(key...
Implement cache and merge intervals
This question evaluates proficiency in designing and implementing efficient data structures (a fixed-capacity LRU key-value cache) and interval-proces...