Top 15 Blockchain interview Question and Answers

There are several opportunities from numerous reputed organizations in the world. So, you have opportunity to move ahead in your career in Blockchain. If you’re seeking for Blockchain Interview Questions, you are at right place.  Here are advanced Blockchain Interview Questions that helps you in cracking your interview.

  1. What do you mean by blocks in the Blockchain technology?

A block in the Blockcahin 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.

  1. Why Blockchain is a trusted approach

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. 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.

  1. Is Blockchain an incorruptible ledger?

Blockchain ledger cannot be corrupted as per the developer’s claim.

  1. Is it possible in Blockchain to remove one or more block from the networks?

Yes, it can be done. There are circumstances when only a particular portion of this online ledger is to be considered. With the help of default options and filters, this can easily be done without making too much effort.

  1. What do you know about Blockchain?

Blockchain is a technology which was uniquely designed for the Bitcoin and later it got a lot of publicity due to various array of advantages it brings when it comes to observing and recording all the financial transactions that are made on a network. It’s a trusted approach and there are a lot of companies in the present scenario which are using it. As everything is secure, and because it’s an open source approach, it can easily be trusted for the long run.Blockchain_QA

  1. How does a block is recognized in the Blockchain approach?

Every block in this online ledger mainly consists of a hash pointer which acts as a link to the block which is previous to it, transaction data and in fact a stamp of time.

  1. What exactly do you know about the security of a block?

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.

  1. Is there any network specific conditions for using Blockchain technology in an organization?

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.

  1. What is encryption? What is its role in Blockchain?

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.

  1. Is it possible to modify the data once it is written in a block?

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.

  1. What type of records can be kept in Blockchain? Is there any restriction on same?

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:

  • Records of medical transactions
  • Identity management
  • Transaction processing
  • Events related to organizations,
  • Management activities
  • Documentation
  1. Explain the significance of blind signature and how it is useful?

Blind signature is actually a form of digital signature and is very important part of the cryptography in which all the information is made blind before it is actually signed. This is verified approach and is mainly considered in the privacy-related protocols where both the author and the signing parties are different.

  1. What is Secret Sharing? Does it have any benefit in Blockchain technology?

It is a 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.

  1. What is a security policy?

A security policy defines what exactly needs to be secured on a system. It confines a network user under some core protocols that they all must agree and follow to improve the overall security. When it comes to information or financial records of an organization, multiple security policies are applied than just one.

  1. Name the steps that are involved in the Blockchain project implementation?

There are six steps involved in this process and they are:

  • Requirement identification
  • Project development for Blockchain
  • Screen ideas consideration
  • Implementation
  • Feasible study on the security
  • Controlling and monitoring the project. Read More



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