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Top Blockchain certified professional interview question and answers

December 18, 2021 comments off

How do you respond to blockchain?

The blockchain is a decentralized distributed database of immutable records. The technology was discovered with the invention of Bitcoins (the first cryptocurrency). It’s a trusted approach and there are a lot of companies in the present scenario which are using it.

How many types of ledgers are used in blockchain?

However, different use cases require different types of blockchain. There are four main types of blockchain networks: public blockchains, private blockchains, consortium blockchains, and hybrid blockchains. Each one of these platforms has its benefits, drawbacks, and ideal uses.

What is the first block in a blockchain called?

A Genesis Block is the name given to the first block a cryptocurrency, such as Bitcoin, ever mined. … Bitcoin’s Genesis Block was the first instance of a proof-of-work blockchain system and is the template for all other blocks in its blockchain.

What is blockchain structure?

The blockchain data structure is an ordered, back-linked list of blocks of transactions. The blockchain can be stored as a flat-file, or in a simple database. … Each block within the blockchain is identified by a hash, generated using the SHA256 cryptographic hash algorithm on the header of the block.

What technology is used in blockchain?

Blockchain, sometimes referred to as Distributed Ledger Technology (DLT), makes the history of any digital asset unalterable and transparent through the use of decentralization and cryptographic hashing.

How many Blockchains are there?

Blockchain technology is open source, meaning any software developer can use the original source code and create something new with it. Developers have done just that. There are estimated to be more than 4,500 different cryptocurrencies in circulation as of this writing, and the figure keeps increasing.

What companies use blockchain?

Microsoft, Amazon, Tencent, Nvidia, J.P. Morgan, Walmart, Alibaba, PayPal, Samsung, and the Bank of China are among the 27 companies with live blockchain operations.

How is data written to a Blockchain?

Blockchains are write-only data structures with no administrative permissions for editing or deleting the data. The data structures are known as blocks and are distributed in a P2P network. Each block contains the cryptographic hash function of the previous block and is used to develop a link between them.

What is a node in blockchain?

The term “node” is being used mostly in relation to blockchain, a decentralized digital ledger that records all cryptocurrency transactions and makes the information available to everyone via a connected device. … A blockchain node’s main purpose is to verify each batch of network transactions, called blocks.

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