--- title: "Meet Kumar Jain (@meetjain74) | Hashnode" description: "Learning Web3 | Blockchain | Android | Java. Read the latest articles by Meet Kumar Jain on Hashnode." url: "https://hashnode.com/@meetjain74" --- @meetjain74 # Meet Kumar Jain @meetjain74 路 Joined July 2021 Learning Web3 | Blockchain | Android | Java ### [Blockchain foundation and smart contracts (BFSC)](https://meetjainblogs.hashnode.dev/blockchain-foundation-and-smart-contracts-bfsc?utm_source=hashnode&utm_medium=feed) Blockchain Decentralization Consensus Everyone coming to an agreement 1980 Two general problem Imagine you live in the Land of Computing and you鈥檙e a general of the army. Your title is General A. You and your soldiers are strategically positioned in ... 54 min read 路 [meetjainblogs.hashnode.dev](https://meetjainblogs.hashnode.dev/blockchain-foundation-and-smart-contracts-bfsc?utm_source=hashnode&utm_medium=feed) [May 15, 2024](https://hashnode.com/posts/blockchain-foundation-and-smart-contracts-bfsc/6644bd6ea82b0dd6143b7aaa) ### [Basic features for designing a secure system](https://meetjainblogs.hashnode.dev/basic-features-for-designing-a-secure-system?utm_source=hashnode&utm_medium=feed) We all might have looked and some of us have created many apps as well as websites but have you ever focused on the security of that software? Is your software safe from hackers attacking it? If not, what security features should a software contain? ... 3 min read 路 [meetjainblogs.hashnode.dev](https://meetjainblogs.hashnode.dev/basic-features-for-designing-a-secure-system?utm_source=hashnode&utm_medium=feed) [Feb 6, 2024](https://hashnode.com/posts/basic-features-for-designing-a-secure-system/65c2790715a669c282ad5b6b) ### [What are POAPs?](https://meetjainblogs.hashnode.dev/what-are-poaps?utm_source=hashnode&utm_medium=feed) Hello readers馃憢 The NFT space is booming so much and so are its applications. Whether used as digital artwork, an avatar, or an in-game asset, the applications of non-fungible tokens (NFTs) have grown exponentially over the past few years. One of the... 2 min read 路 [meetjainblogs.hashnode.dev](https://meetjainblogs.hashnode.dev/what-are-poaps?utm_source=hashnode&utm_medium=feed) [Feb 6, 2024](https://hashnode.com/posts/what-are-poaps/65c276b26ac6094172ffe673) ### [Operating System(OS) Preparation for Interviews](https://meetjainblogs.hashnode.dev/operating-systemos-preparation-for-interviews?utm_source=hashnode&utm_medium=feed) Complete operating system guide to learn or revise before placement interviews. 27 min read 路 [meetjainblogs.hashnode.dev](https://meetjainblogs.hashnode.dev/operating-systemos-preparation-for-interviews?utm_source=hashnode&utm_medium=feed) [Aug 23, 2022](https://hashnode.com/posts/operating-systemos-preparation-for-interviews/6304e3ad8f733542b12127ea) ### [Graph data structure](https://meetjainblogs.hashnode.dev/graph-data-structure?utm_source=hashnode&utm_medium=feed) What are graphs? A graph is a non-linear kind of data structure made up of nodes or vertices and edges. The edges connect any two nodes in the graph, and the nodes are also known as vertices. This graph has a set of vertices V= {1,2,3,4,5} and a set... 15 min read 路 [meetjainblogs.hashnode.dev](https://meetjainblogs.hashnode.dev/graph-data-structure?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/graph-data-structure/62c71791353b847f29e89676) [Jul 7, 2022](https://hashnode.com/posts/graph-data-structure/62c71791353b847f29e89676)