BTA Certified Blockchain Developer - Hyperledger Fabric Question and Answers

BTA Certified Blockchain Developer - Hyperledger Fabric

Last Update Apr 17, 2024
Total Questions : 195

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Questions 1

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

Discussion 0

Questions 2

The ________________________enables auditors to view transactions pertaining to a participant, providing that each auditor has been granted proper access authority, based on the role of the participants.

Options:

Audit Defense

Hyperledger Quilt

Hyperledger Burrow

Reputation Manager

Discussion 0

Questions 3

Business Network Application Model is created in Composer using:

Options:

Composer Javascript Model API

Composer Runtimes

Composer Modelling Language

Discussion 0

Questions 4

The Hyperledger Fabric framework is implemented on what programming environment?

Options:

C++

Node.js

PHP

Javascript

Python

Discussion 0

Questions 5

The Hyperledger Project consists of the following EXCEPT?

Options:

Infrastructure

Tools

Framework

Management

Discussion 0

Questions 6

All of the modeling components MUST be defined in a single file.

Options:

TRUE

FALSE

Discussion 0

Questions 7

The advantages of using Hyperledger Fabric include which of the following?

Options:

Having a modular component structure

Having a native token

Having a POW mining algorithm

Ability to use your programs from SQL

Discussion 0

Questions 8

Access to Hyperledger Fabric Business Network Application is granted based on the______of the participant

Options:

Identity

Role

Legality

Discussion 0

Questions 9

There are currently three supported ordering services in Hyperledger Fabric and one service is used by developers experimenting with Hyperledger Fabric networks.

What service is this?

Options:

PoET

Kafks

SOLO

SBFT

BFT

Discussion 0

Questions 10

Chaincode on Fabric can be developed using:

Options:

GoLang

Java

Javasacrlpt (node)

All of the above

Discussion 0

Questions 11

Exhibit.

Options:

This command issues a card for the admin user

This command issues a revocation for the user Ernesto

This command issues a card for the user Ernesto and exports the card file to the current directory

This command does none of the above

Discussion 0

Questions 12

Chaincode Services uses Docker to host (deploy) the chaincode without relying on any virtual machine or computer language.

What would be the main reason or best reason that Hyperledger chose containers over virtual machines?

Options:

Docker provides a secured, lightweight method to sandbox chaincode execution that is “locked down”.

Docker provides a secured, lightweight method to sandbox chaincode execution that is “locked down” but additional programming languages cannot be enabled

Docker provides a secured, lightweight method to sandbox chaincode execution that is not “locked down”

Docker is fully compatible with Hyperledger and Linux with an upgrade subscription.

Discussion 0

Questions 13

A member can participate in multiple Hyperledger blockchain networks by way of_______

Options:

Channels

Peers

DLT

World State

Discussion 0

Questions 14

Members of the Hyperledger Fabric DLT network may be allowed to issue certificates to their employees and for their infrastructure

Options:

FALSE

TRUE

Discussion 0

Questions 15

To ship goods, an entity needs to model an entity that is not an asset, participant transaction. or event. How would this be done?

Options:

Option A

Option B

Option D

Discussion 0

Questions 16

The pluggable world state database is:

Options:

CouchDB or LevelDB

MariaDB and file system

Both A and B

Neither A nor B

Discussion 0

Questions 17

In Hyperledger Fabric, there are three types of peer nodes depending upon the assigned roles.

What are three types? (Choose three.)

Options:

Committing Peer

Endorsing Peer

Peer

Client peer

MSP Peer

Channel Peer

Ordering Peer

Discussion 0

Answer:

B, C, G

Explanation:

So not all peer nodes are same. There are different types of peer nodes with different roles in the network: Endorser peer Anchor peer Orderer peer Endorser peer Peers can be marked as Endorser peer (Endorsing peer). Upon receiving the “transaction invocation request” from the Client application the Endorser peer Validates the transaction. Check certificate details and roles of the requester. Executes the Chaincode (Smart Contract) and simulates the outcome of the transaction. But it does not update the ledger. At the end of the above two tasks the Endorser may approve to disapprove the transaction. As only the Endorser node executes the Chaincode (Smart Contract) so there is no necessity to install Chaincode in each and every node of the network which increases the scalibility of the network. Anchor peer Anchor peer or cluster of Anchor peers is configured at the time of Channel configuration. Just to remind you, in Hyperledger Fabric you can configure secret channels among the peers and transactions among the peers of that channel are visible only to them. Anchor peer receives updates and broadcasts the updates to the other peers in the organization. Anchor peers are discoverable. So any peer marked as Anchor peer can be discovered by the Orderer peer or any other peer. Orderer peer Orderer peer is considered as the central communication channel for the Hyperledger Fabric network. Orderer peer/node is responsible for consistent Ledger state accross the network. Orderer peer creates the block and delivers that to all the peers. Orderer is built on top of a message oriented architecture. There are two options are currently available to implement Orderer peer: Solo: Suitable for development. Single point failure. Solo should not be used for the production ready network. Kafka: Production ready Hyperledger Fabric network uses Kafka as the Orderer implementation. Kafka is a messaging software that has high throughput fault tolerant feature.

Questions 18

When creating Chaincode for your application what are two tasks you need to perform before running chaincode?

Options:

Make sure that a directory is created for your chaincode application as a child

Fork the hyperledger Github.

JS programming language installed and correctly configured.

Go programming language installed and correctly configured.

Create a directory on every peer node.

Discussion 0

Questions 19

Exhibit.

The function displayed is called

Options:

On the instantiation of the chaincode

On the 3rd call to the chaincode

On every invocation of the chaincode

On the teardown of the chaincode

Discussion 0

Questions 20

You would like to download Hyperledger Fabric.

What would be the command to start the process?

Options:

ftp clone https://github.com/hyperledger/fabric.sh

git clone https://github.com/hyperledger/fabric.git

ftp clone https://github.com/hyperledger/fabric.git

Discussion 0

Questions 21

Exhibit.

Based on the chaincode displayed, which function will call shim, Start?

Options:

main.

Invoke

Init

get

Discussion 0

Questions 22

Exhibit.

In Hyperledger Fabric Composer the above code is an enumeration. Enumerations are used:

Options:

As a way to group properties with known values to make validation easier

As the primary means of creating channels

To discourage reusable code

As a way to prevent users from access the asset properties

Discussion 0

Questions 23

Concepts, like other resources, can be instantiated

Options:

TRUE

FALSE

Discussion 0

Questions 24

When deploying a database option there are some important things to consider from a deployment perspective. CouchDB and LevelDB can be deployed with Fabric.

Which of the following is a true statement in regards to ledger deployment?

Options:

A CouchDB database is closely co-located with a network node and runs in a separate operating system process

A LevelDB database is closely co-located with a network node and runs in a separate operating system process

A CouchDB database is closely co-located with a network node and it is embedded within the same operating system process

A LevelDB database is closely co-located with a network node and it is embedded within the same operating system process

Discussion 0

Questions 25

Which tool would you select to that would allow users to measure performance of a specific implementation with predefined use cases?

Options:

Hyperledger Caliper

Hyperledger Explorer

Hyperledger Cello

Hyperledger Quilt

Discussion 0

Questions 26

What function in chaincode will be used to store a state on the blockchain ledger?

Options:

ChaincodeStubInterface.getFunctionAndParameters

ChaincodelLedgerInterface.PlaceState

ChaincodeStubInterface.PlaceState

ChaincodeStubInterface.PutState

ChaincodeLedgerInterfaceStoreState

Discussion 0

Questions 27

Each channel manages its own_____and______

Options:

Chamcode, Ledger

Peers, Chamcode

Ledger, Peers

Discussion 0

Questions 28

Which of the following is the BEST definition of Decentralization?

Options:

Peer-to-Peer data sharing, hosting hardware owned by many not few, fault tolerant, secure, lower performance

Distributed data sharing, hosting hardware owned by many not few, fault tolerant, secure, lower performance

Peer-to-Peer data sharing, hosting hardware owned by a few not many, fault tolerant, secure, lower performance

Discussion 0

Questions 29

What type of peer endorses and executes a transaction?

Options:

Endorsement Peer

Peered Peer

Executing Peer

Endorsing Peer

Peer Node

Discussion 0

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