Assalamu alaikum I hope everyone is very well, and I am also good Alhamdulillah. Today I have share my Home Work Task on Blockchain Tutorials with you. This is a very important post about blockchain. So let's get started my homework.

Explain the security feature of Blockchain.

Blockchain is decentralized technology, the security of blockchain technology is very strong. Data entered in blockchain technology cannot be deleted. In blockchain technology each data is stored in a specific block, when the block is completed it merges with the previous block like a chain. Since the blocks are in the form of chains, it is called blockchain. And it's so strong that no one here can permanently delete or change the data even if they want to. And since it is decentralized, it is out of control, so it is very safe. At present blockchain technology can provide us with maximum security.

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What do you mean by mining in Blockchain?

In blockchain technology, the transaction verification process is called mining, and those who are involved in mining activities are rewarded for conducting mining activities. You can participate in these mining activities in any country, but the systems of different blockchains may be different for participating in mining activities. The main function of mining is to verify the transactions of that blockchain. A new hash is created for each transaction, many blocks are created by matching hashes. And this block is associated with the previous block.

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What do you mean by DPoS system of mining? Differentiate Proof of Stake and Proof of Work.

In the DPoS (Delegated Proof of Stake) system, miners are selected in accordance with democracy. Those who have a coin stake in the selection of miners vote. The ability to vote depends on the coin stakeholder. The one who gets more votes will be more likely to be elected. Those who win the vote will have the opportunity to mine.

• Proof of Stake requires more energy but Proof of Work requires less energy Proof of Work.
• Proof of Stake is to acquire mining by buying coin. Proof of Work is to acquire mining by buying hardware.
• Proof of Stake is more expensive. Proof of work is less expensive.
• Proof of Stake has to solve important algorithms Proof of Work has to solve difficult puzzles
• There is no competition in Proof of Stake to create blocks. Proof of Work has competition to solve difficult puzzles.

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Why boundaryless trading is important?

Introducing cryptocurrency globally will be safe for all people as cryptocurrency is a boundaryless currency. We see that I am currently in Bangladesh. If I go to another country from Bangladesh then all I have to do is get down at the airport of that country and convert our country's Bengali money into that country's money. You have to go to that country and use the currency of that country. But if the world adopts this cryptocurrency then it can be used in all countries then there will be no problem of exchange from one country to another and it will be much more convenient for people from all countries to travel anywhere. So if the cryptocurrency process is adopted in all countries and it inspires the common man to use it, then it will be of great benefit to the people of all countries of all kinds in the world.

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Differentiate Cryptocurrency and Blockchian

Many people think that blockchain technology is for cryptocurrency, but in fact cryptocurrency is a part of blockchain technology, that is, cryptocurrency has been created with the help of blockchain technology. But blockchain technology is a technology that can be used for many important purposes in today's world. The advantage of blockchain technology is that it decentralizes and if any information is entered here it cannot be deleted and anyone from all over the world can see it. In that case we can use it for many other purposes. And cryptocurrency is a digital currency, cryptocurrency is decentralized so it is not under anyone's control. Recognizing cryptocurrency as a global currency will benefit all types of people. Cryptocurrency is an innovation with the help of blockchain technology.