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Blockchain Developer - Hyperledger Fabric
CBDH
BTA Certified Blockchain Developer – Hyperledger Questions and Answers

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Viewing questions 21-30 out of questions

Questions # 21:

How are "assets" in Hyperledger Fabric represented? (Select two.)

Options:

Binary

JSON

Node.JS

Yaml

Answer

A, C

Explanation

Assets in Hyperledger Fabric are represented in JSON or Binary. Assets are represented in Hyperledger Fabric as a collection of key-value pairs, with state changes recorded as transactions on a Channel ledger. Assets can be represented in binary and/or JSON form. Dont get confused of how Fabric is developed and how assets in chaincode are deployed

References:

Questions # 22:

All of the following are key terms in Cryptography EXCEPT?

Options:

Function

Root Hash

Secret

Code

Cipher

Answer

Explanation

Cryptography is used in Blockchain to address the issues and concerns of privacy. Cryptography is the study of how to send information back and forth securely in the presence of adversaries. A cryptographic function is a function for encoding or encrypting data to protect the contents from others. The following components are the basis of a cryptographic function: The Secret: The data which we are trying to protect The Key: A piece of data used for encrypting and decrypting the secret The Function: The process or function used to encrypt the secret The Cipher: The encrypted secret data, output of the function The Secret and the Key are passed into the Function to create a Cipher.

Questions # 23:

In Composer when declaring arguments are used to pass values. What argument value is NOT a value that is allowed?

Options:

string

integer

number

boolean

Answer

Explanation

References:

Questions # 24:

Exhibit.

Question # 24

Based on the displayed code snippet, the code most likely resides in which file:

Options:

permissions.acl

transfer.model

logic.js

transfer.cto

Answer

Questions # 25:

Chaincode on Fabric can be developed using:

Options:

GoLang

Java

Javasacrlpt (node)

All of the above

Answer

Questions # 26:

The security module works in conjunction with the ________________________ module to provide access control service to any data recorded and business logic deployed on a chain network.

Options:

HSM

Membership Services

Chaincode

Consensus

Answer

Explanation

The security module works in conjunction with the membership service module to provide access control service to any data recorded and business logic deployed on a chain network.

Questions # 27:

The pluggable world state database is:

Options:

CouchDB or LevelDB

MariaDB and file system

Both A and B

Neither A nor B

Answer

Questions # 28:

The fastest way to test your chaincode is to use the REST interface on your peers. There are several REST endpoints you can test and interact with chaincode. (Select two.)

Options:

/registrar

/register

/chaincode

/blockchain

/BaaS

Answer

A, C

Explanation

/chaincode is the endpoint used for deploying, invoking, and querying chaincode. Which operation you perform is controlled by the body of the request that you send. /registrar allows you to enroll users.

References:

Questions # 29:

When your developing with Fabric Composer which of the following is true?

Options:

Decrease the time of development

Simplifies the development of applications

Simplifies the code integration of applications

Increases the time of development

Answer

Explanation

Hyperledger Composer is an open-source application development framework which simplifies the creation of Hyperledger Fabric blockchain applications, thus reducing the time and complexity of development. The tool aims at helping users to create blockchain applications based on Hyperledger Fabric without needing to know the low-level (Go Programming) details involved in blockchain networks.

Questions # 30:

Exhibit.

Question # 30