Interview Questions
Practice the exact questions companies are asking right now.
Questions
10.0k
Companies
520
Updated
08.21.2026
10.0k Questions 520 Companies08.21.2026
PLTCHK
"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"
_The_TaNk_
"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"
ChrisSenior SWE, LinkedIn
"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."
sleepy33
"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."
JakeSenior ML Engineer, Lyft
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
nuggetlord
"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."
CarlosFull Stack, Shopify
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
boba.tea.vibes
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
AndySWE-II, Google
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
couchpotato99
"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."
ShrutiData Engineer, Salesforce
"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."
midnightramen
"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."
BiancaFrontend Eng, Figma
"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."
tambrahm007
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
toa
"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."
Showing 20 results
Role
Medium
Data ScientistDesign experiment for bike delivery feature
You work on a delivery marketplace (customers, merchants, couriers). The company is considering launching a “bike delivery” capability in a subset of ...
Analytics & Experimentation
5
0
75 people solved
Nov 15, 2025
Medium
Machine Learning EngineerDescribe your research and contributions
Describe your research and contributions 10–15 Minute Research Project Overview (Technical Screen) Context You are interviewing for a Machine Learning...
Behavioral & Leadership
18
0
144 people solved
Jul 17, 2025
Medium
Machine Learning EngineerExplain core ML fundamentals
Explain core ML fundamentals ML Fundamentals — Onsite Interview Task Context: Answer the following fundamentals as if in an onsite ML Engineer intervi...
Machine Learning
9
0
75 people solved
Jul 17, 2025
Medium
Software EngineerIdentify and prevent code-breaking inputs
Identify and prevent code-breaking inputs Identify inputs and scenarios that could break your implementation and explain how you would prevent them. C...
Coding & Algorithms
5
0
61 people solved
Jul 17, 2025
Medium
Software EngineerImplement O(1) randomized multiset
Implement O(1) randomized multiset Write code for a data structure that supports add(x), remove(x), and getRandom() in average O( 1) time where duplic...
Coding & Algorithms
3
0
44 people solved
Jul 17, 2025
Medium
Machine Learning Engineer LockedImplement BST Iterator and Ticket Queue
This question evaluates understanding of binary search tree traversal and iterator design with amortized time and space analysis, as well as dynamic p...
Coding & Algorithms
2
0
42 people solved
Jan 24, 2026
Medium
Software EngineerSort Three Categories In Place
You are given an array items containing only the values 0, 1, and 2, where each value represents a category. Rearrange the array in-place so that all ...
Coding & Algorithms
0
0
9 people solved
Apr 18, 2026
Medium
Machine Learning EngineerDesign a Product Search System
Design a product search system for a large e-commerce marketplace. Users enter free-text queries such as wireless headphones, apply filters such as pr...
ML System Design
10
0
85 people solved
Apr 18, 2026
Medium
Machine Learning EngineerImplement K-Means and Detect Divisible Subarrays
Solve both coding tasks. Part A: Implement K-Means Clustering Implement K-means clustering for a set of points. Given: - points: a list of n points, w...
Coding & Algorithms
1
0
17 people solved
Apr 18, 2026
Medium
Machine Learning EngineerSenior+Design In-Memory QPS Counter
Implement an in-memory traffic counter. You need to support two operations for each logical key, such as an endpoint, customer, or service name: - rec...
Coding & Algorithms
12
0
94 people solved
Apr 18, 2026
Medium
Data ScientistInvestigate Harassment Surge and Mitigation
Question You work on content integrity. Your monthly moderation analysis shows that the Harassment violation type increased sharply in the most recent...
Analytics & Experimentation
7
0
57 people solved
Nov 14, 2025
Medium
Software EngineerCount decodings of a digit string
Count decodings of a digit string You are given a non-empty digit string s consisting of characters '0'–'9' and a mapping where 1->'a', 2->'b', ..., 2...
Coding & Algorithms
3
0
42 people solved
Jul 16, 2025
Medium
Software EngineerSolve unique triplets summing to target
Solve unique triplets summing to target Implement a function that, given an integer array nums and an integer target T, returns all unique triplets [x...
Coding & Algorithms
5
0
88 people solved
Jul 15, 2025
Medium
Software EngineerDetermine winner in optimal-play card game
Determine winner in optimal-play card game Given a row of N cards with integer values (values may be positive, zero, or negative), two players alterna...
Coding & Algorithms
20
2
160 people solved
Jul 15, 2025
Medium
Software EngineerImplement a simple service with tests
Implement a simple service with tests You're given a short written specification for a small service class (no external dependencies). Implement the c...
Coding & Algorithms
9
0
110 people solved
Jul 15, 2025
Easy
Software EngineerExplain sync/async, Go concurrency, SQL vs NoSQL
You are interviewing for a backend engineering role. Answer the following conceptual questions clearly and with concrete examples. 1) Synchronous vs a...
Software Engineering Fundamentals
27
0
248 people solved
Nov 13, 2025
Hard
Software EngineerSchedule batched register operations optimally
Problem You are given a text file that describes batches of register operations (reads and writes) on integer-indexed registers. Your task is to sched...
Coding & Algorithms
16
0
123 people solved
Nov 13, 2025
Easy
Software EngineerEqualize Root-to-Leaf Sums in an N-ary Tree
Equalize Root-to-Leaf Sums in an N-ary Tree You are given a rooted tree. Node i has nonnegative value values[i]. In one operation, you may increase on...
Coding & Algorithms
0
0
11 people solved
Apr 17, 2026
Easy
Software EngineerDescribe a Favorite Project and Its Hardest Technical Challenge
Describe a Favorite Project and Its Hardest Technical Challenge Prompt Tell me about a project you are especially proud of or enjoyed working on. Expl...
Behavioral & Leadership
1
0
13 people solved
Apr 17, 2026
Hard
Software EngineerDetermine Whether a Word Exists in a Character Grid
Given a 2D character grid and a word, return whether the word can be formed by moving horizontally or vertically between adjacent cells without reusin...
Coding & Algorithms
0
0
13 people solved
Apr 17, 2026