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
Hard
Product ManagerProfile Customization for Millennials & Gen Z
Product Design Prompt: Profile Customization for Millennials and Gen Z You are a Product Manager at Tinder designing a new profile-customization featu...
Product / Decision Making
8
0
42 people solved
Jul 4, 2025
Hard
Software EngineerNew GradImplement firewall matching with CIDR rules
Implement a simple IPv4 firewall rule matcher. Problem You are given an ordered list of firewall rules. Each rule has: - an action: ALLOW or DENY - a ...
Coding & Algorithms
11
2
177 people solved
Dec 10, 2025
Medium
Software Engineer LockedExplain C++ containers, segfaults, and virtual dispatch
This question evaluates a candidate's understanding of C++ language and runtime fundamentals — covering standard container implementations and perform...
Software Engineering Fundamentals
7
0
51 people solved
Dec 10, 2025
Easy
Machine Learning EngineerContrast CNNs and fully connected networks
Compare convolutional neural networks (CNNs) with fully connected (dense) networks. Explain: - The structural differences between convolutional layers...
Machine Learning
3
0
56 people solved
Dec 8, 2025
Easy
Machine Learning EngineerImplement recent-requests counter
You are designing an in-memory component for a web service that needs to track how many requests ("hits") it has received in the last 5 minutes. Imple...
Coding & Algorithms
11
0
109 people solved
Dec 8, 2025
Medium
Data ScientistCompute maximum non-overlapping meetings
Assume you are given a list of meeting time intervals for a single person. Each meeting i is represented by a pair of integers [start_i, end_i], where...
Coding & Algorithms
2
0
49 people solved
Dec 8, 2025
Medium
Software EngineerSum numbers formed by root-to-leaf paths
You are given the root of a binary tree where each node contains a single digit from 0 to 9. Each root-to-leaf path represents a number obtained by co...
Coding & Algorithms
4
0
39 people solved
Dec 8, 2025
Medium
Software EngineerParse payroll file and answer queries
You are given a payroll "file" as a StringIO (file-like) object in Python. The underlying text represents manually-entered payroll data. Assume the fo...
Coding & Algorithms
4
0
80 people solved
Dec 8, 2025
Easy
Software EngineerDiscuss experience with company products
In an interview with a company that develops infrastructure products (for example, Cloudflare), the interviewer asks: > Do you have any experience usi...
Behavioral & Leadership
3
0
43 people solved
Dec 8, 2025
Medium
Software EngineerImplement account scheduler with locking and LRU
Design a class AccountScheduler that manages the time-based availability of a fixed set of account IDs. Initialization You are given: - accounts: a li...
Coding & Algorithms
5
1
42 people solved
Dec 8, 2025
Medium
Data ScientistMaximize revenue from inventory sales
Problem A store has n different products. For each product i (0-indexed), you are given an integer quantity[i] representing how many units of that pro...
Coding & Algorithms
6
0
64 people solved
Dec 8, 2025
Hard
Software EngineerTrack simulations and report timeouts
You are implementing a monitoring component for many concurrent simulations. Each simulation produces a stream of event objects of the form: - sim_id ...
Coding & Algorithms
2
0
29 people solved
Dec 8, 2025
Hard
Software EngineerShuffle array using random integer API
You are given an array nums of length n representing a deck of distinct cards. You do not have access to a built-in shuffle function, but you are give...
Coding & Algorithms
6
0
80 people solved
Dec 8, 2025
Hard
Software EngineerFind longest duplicated substring
You are given a string s consisting of lowercase English letters. A substring of s is any contiguous sequence of characters, i.e., s[i..j) for 0 ≤ i <...
Coding & Algorithms
10
0
142 people solved
Dec 8, 2025
Medium
Software EngineerFind user pairs with overlapping last K movies
You are given the same user movie-watching histories as in the previous problem. Each user’s history is an ordered list of movie IDs from earliest to ...
Coding & Algorithms
21
0
146 people solved
Dec 8, 2025
Medium
Software EngineerImplement a rate-limited hit counter
You are designing a hit counter that records the number of hits received in the past 5 minutes. Implement a class HitCounter with the following method...
Coding & Algorithms
20
0
328 people solved
Dec 8, 2025
Medium
Software EngineerFind common active intervals across cameras
You are now processing data from multiple security cameras. You are given: - An integer N, the number of cameras. - A threshold value T (a real number...
Coding & Algorithms
7
1
79 people solved
Dec 8, 2025
Medium
Software EngineerCompute median of two sorted arrays
You are given two sorted arrays of integers nums1 and nums2. - nums1 has length m, nums2 has length n. - Both arrays are sorted in non-decreasing orde...
Coding & Algorithms
11
0
214 people solved
Dec 8, 2025
Medium
Machine Learning EngineerFind shortest path in a grid with obstacles
You are given a 2D grid of size m x n representing a maze. Each cell in the grid is either empty (0) or blocked (1). You are also given two coordinate...
Coding & Algorithms
5
0
66 people solved
Dec 8, 2025
Medium
Software EngineerDescribe an ambiguous project you handled
Describe a time when you worked on a project with a lot of ambiguity (unclear requirements, unknown constraints, or shifting priorities). Explain: - W...
Behavioral & Leadership
2
0
48 people solved
Dec 8, 2025