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."
Find minimum processing rate
Find minimum processing rate You are given an array piles where piles[i] is the number of items in the i-th pile and an integer H (total hours). Find ...
Validate 9x9 grid in one pass
Validate 9x9 grid in one pass Given a partially filled 9x9 board using digits '1'–'9' and '.' for empty cells, determine whether the current configura...
Implement LRU cache with O(1) ops
Implement LRU cache with O(1) ops Design and implement a fixed-capacity cache supporting get(key) -> value and put(key, value) in O( 1) average time. ...
Compute courier pay with peak-hour rules
Implement compute_pay(deliveries) to calculate a delivery driver's daily pay from a list of delivery records. Each record may include times, miles, ba...
Find odd-frequency element with O(1) space
You're given an integer array where exactly one value appears an odd number of times and all other values appear an even number of times. Implement a ...
Count vowel-only substrings with all vowels
Count vowel-only substrings with all vowels Given a lowercase English string s, return the number of contiguous substrings that ( 1) consist only of v...
Design limited-time donation platform
Design limited-time donation platform System Design: Donations Platform for a Three-Day Global Fundraising Campaign Context You are to design an inter...
Solve capital selection and grid escape
Solve capital selection and grid escape Implement two functions for algorithmic practice: 1) MaximizeCapitalAfterProjects(k, initialCapital, requiredC...
Find longest substring with at least k repeats
Find longest substring with at least k repeats Longest substring where each character appears at least k times You are given: - a string s consisting ...
Solve graph path, interval deletion, and robbery
Solve graph path, interval deletion, and robbery Part A — Optimal path with transport modes: You are given a directed weighted graph of a city. Each e...
Generate the next lexicographic array arrangement
Generate the next lexicographic array arrangement Given an integer array nums (which may include negative numbers and duplicates), modify nums in plac...
Find users with access to all cameras
Given entities and relationships (user, owns, camera), (user, belongs_to, group), (group, owns, camera), and (group, belongs_to, group) where groups c...
Explain multithreading and locks
Explain multithreading and locks Multithreading, Locks, Concurrency Hazards, and a Bounded Queue Design Context: Technical screen for a software engin...
Fix a BST with two misplaced keys
Fix a BST with two misplaced keys You are given the root of a binary search tree in which exactly two nodes’ keys were accidentally swapped. Restore t...
Implement distinct islands and sliding maxima
Implement distinct islands and sliding maxima 1) Given a binary grid where 1 represents land and 0 represents water, count how many distinct island sh...
Solve swaps, graph paths, and movie DP
Solve swaps, graph paths, and movie DP Design and implement solutions for three tasks derived from a HackerRank-style assessment. 1) Minimum swaps to ...
Determine string segmentability with dictionary
Determine string segmentability with dictionary Given a string s and a dictionary of words, determine whether s can be segmented into a sequence of di...
Compute nearest courier for each customer
Compute nearest courier for each customer You are given two sets of 2D points: customers C = {c1..cn} and active couriers (dashers) D = {d1..dm}. Each...
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...
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 ...