The following are some of the most frequently asked Blockchain interview questions in the interview, here are the answers for them.
The blockchain is an incorruptible digital ledger of economic transactions that can be programmed to record not just financial transactions but virtually everything of value.
A block in the Blockchain is nothing but just a list of records. When these lists are joined with each other, they are known as Blockchain. For e.g. – an organization has 100 ledger books the combination of which is known as Blockchain and a single ledger would be known as a block.
Every block in this online ledger mainly consists of a hash pointer that acts as a link to the block which is previous to it, transaction data, and in fact a stamp of time.
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No, there is no such specific condition on using it. However, the network must be a peer-to-peer network under the worried protocols. It really validates the new block simply and helps enterprises to keep up the pace in this matter without capitalizing in third-party applications.
No, it is not possible to do so. In case any customization is required, the organization simply has to remove the information from all other blocks too. It is because of no other reason than this, data must be given the extreme care of while using this method.
There is no restriction of keeping records in the Blockchain approach. It must be noted that the record-keeping is not just limited to these applications only.
The common types of records that can be kept on them are:
Encryption is mainly a method that helps organizations to keep their data secure. In this method, the data is encoded up to some extent before it is sent out of a network by the sender. The only receiver can know how to decode the same. In Blockchain, this method is useful because it simply adds more to the overall security and validity of blocks and help to keep them secure.
A block cannot be customized by all the users on a network. Therefore it provides an excellent level of security. Additionally, every block is secured using cryptography that is another vote in this matter. Thus one needs not to worry about the security of data that is present in a block.
Blockchain can be trusted due to several reasons. The very first thing is its compatibility with other business applications because of its open-source nature. The second one is security. As it was intended for online transactions, the developers have paid special attention in keeping up the pace when it comes to its security. It really doesn’t matter what type of business one owns, Blockchain can easily be considered.
It is well-understood that security matters a lot in digital transactions. Secret sharing in Blockchain technology is an approach that divides secret or personal information into different units and sent them to the users on the network. The original information can only be combined when a member to whom a share of the secret is allocated agree to combine them together with others. There are several security-related advantages it can offer in Blockchain technology.
Blockchain can be trusted due to several reasons. The very first thing is its compatibility with other business applications because of its open-source nature. The second one is its security. As it was intended for online transactions, the developers have paid special attention in keeping up the pace when it comes to its security. It really doesn’t matter what type of business one owns, Blockchain can easily be considered.
Blockchain technology is like the internet in that it has a built-in robustness. By storing blocks of information that are identical across its network, the blockchain cannot:
Bitcoin was invented in 2008. Since that time, the Bitcoin blockchain has operated without significant disruption. (To date, any of the problems associated with Bitcoin have been due to hacking or mismanagement. In other words, these problems come from bad intention and human error, not flaws in the underlying concepts.)
The internet itself has proven to be durable for almost 30 years. It’s a track record that bodes well for blockchain technology as it continues to be developed
The blockchain network lives in a state of consensus, one that automatically checks in with itself every ten minutes. A kind of self-auditing ecosystem of a digital value, the network reconciles every transaction that happens in ten-minute intervals. Each group of these transactions is referred to as a “block”. Two important properties result from this:
Transparency data is embedded within the network as a whole, by definition it is public. It cannot be corrupted altering any unit of information on the blockchain would mean using a huge amount of computing power to override the entire network.
A transaction is a transfer of value between Bitcoin wallets that gets included in the blockchain. Bitcoin wallets keep a secret piece of data called a private key or seed, which is used to sign transactions, providing a mathematical proof that they have come from the owner of the wallet.
Blockchain ledger cannot be corrupted as per the developer’s claim.
Blockchain consensus mechanisms provide the benefits of a consolidated, consistent dataset with reduced errors, near-real-time reference data, and the flexibility for participants to change the descriptions of the assets they own.
Because no one participating member owns the source of origin for the information contained in the shared ledger, blockchain technologies lead to increased trust and integrity in the flow of transaction information among the participating members.
The immutability mechanisms of blockchain technologies lead to lowered cost of the audit and regulatory compliance with improved transparency. And because contracts being executed on business networks using blockchain technologies are smart, automated, and final, businesses benefit from increased speed of execution, reduced costs, and less risk, all of which enables businesses to build new revenue streams to interact with clients.
Blockchain is a truly disruptive technology that can transform business networks. We also believe that this innovation has to happen in the open, collaborating with other technology companies and industries. To this end, IBM continues to contribute code to the Hyperledger Project.
From IBM's perspective, industrial-grade blockchain technologies have the following characteristics:
In addition to these attributes, enterprise blockchain technology needs to meet key industry requirements such as performance, verified identifies, and private and confidential transactions. Hyperledger Fabric has been architected to meet these needs. It is also designed with a pluggable consensus model, allowing businesses to select an optimal algorithm for their networks.
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