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  5. BTA Certified Blockchain Developer – Hyperledger Questions and Answers

CBDH BTA Certified Blockchain Developer – Hyperledger Questions and Answers

Questions 4

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

Options:

A.

Identity

B.

Role

C.

Legality

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Questions 5

Hyperledger blockchain frameworks reach consensus by performing two separate activities.

What are the two activities? (Select two.)

Options:

A.

Updating Transactions

B.

Validating Transactions

C.

Ordering Transactions

D.

Writing Transactions

E.

Packing Transactions

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Questions 6

What Hyperledger sponsored tool is a new 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?

Options:

A.

Hyperledger Quilt

B.

Hyperledger Composer

C.

Hyperledger Explorer

D.

Hyperledger Cello

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Questions 7

You are writing chaincode and you need to access the ledger’s state. What two functions of the chaincode shim API do you select? (Select two.)

Options:

A.

GetState

B.

PutState

C.

InvokeChaincode

D.

GetStringArgs

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Questions 8

Hyperledger fabric business network is divided into which of the following categories?

Options:

A.

Composer, Fabric and Chaincode

B.

Sawtooth, Fabric and Indy

C.

Blockchain, Registration, Identity

D.

Blockchain, Chaincode and Membership

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Questions 9

Model defines the representation of

Options:

A.

Assets

B.

Participants

C.

Transactions

D.

Events

E.

All of the above

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Questions 10

Exhibit.

Options:

A.

This command issues a card for the admin user

B.

This command issues a revocation for the user Ernesto

C.

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

D.

This command does none of the above

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Questions 11

In Hyperledger Composer resources are declared which three ways? (Choose three.)

Options:

A.

Assets, orderers, transactions, and events

B.

Concepts

C.

Assets, participants, transactions, end events

D.

Collections

E.

Non Enumerated types

F.

Enumerated types

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Questions 12

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.

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

B.

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

C.

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

D.

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

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Questions 13

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

Options:

A.

ChaincodeStubInterface.getFunctionAndParameters

B.

ChaincodelLedgerInterface.PlaceState

C.

ChaincodeStubInterface.PlaceState

D.

ChaincodeStubInterface.PutState

E.

ChaincodeLedgerInterfaceStoreState

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Questions 14

In Hyperledger Fabric,_______always validate transactions against endorsement policies and enforce those policies.

Options:

A.

World State DB

B.

Orderer nodes

C.

Committing peers

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Questions 15

Which of the following syntaxes will compile the chaincode?

Options:

A.

go int

B.

go build

C.

go create

D.

go compile

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Questions 16

Consensus on the Blockchain defines________________

Options:

A.

The distribution of each data block

B.

Agreement of a valid transaction by all the network nodes

C.

Security between two blocks of data

D.

Basic security of the blockchain

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Questions 17

In Hyperledger Fabric, miners are called?

Options:

A.

Committer Peer

B.

There are no miners in Hyperledger

C.

Endorser Node

D.

Channels

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Questions 18

Hyperledger Fabric Consensus is planned out into 3 phases. (Select three.)

Options:

A.

Validation

B.

Scheduling

C.

Ordering

D.

Endorsement

E.

Processing

F.

Batching

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Questions 19

State data by default is implemented in LevelDB but it can be replaced by way of configuration with CouchDB.

Options:

A.

FALSE

B.

TRUE

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Questions 20

Business Network Application Model is created in Composer using:

Options:

A.

Composer Javascript Model API

B.

Composer Runtimes

C.

Composer Modelling Language

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Questions 21

What type of peer endorses and executes a transaction?

Options:

A.

Endorsement Peer

B.

Peered Peer

C.

Executing Peer

D.

Endorsing Peer

E.

Peer Node

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Questions 22

Did you know that Blockchain Training Alliance offers a discount for Udemy students to save $90.00 on any BTA Exam?

.

Options:

A.

NO, that’s ok Use Code JH30UDEMY

B.

YES, Use Code JH30UDEMY

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Questions 23

In Hyperledger Fabric channels are used to ensure privacy and confidentiality. Which of the following is not correct about channels?

Options:

A.

Peers are connected to the channel and can receive all the transactions that are broadcasted on that channel

B.

Each channel maintains their own chaincode and ledger

C.

Channels are membership based.

D.

Consensus takes place within a channel by members of the channel and other channels.

E.

Channels partition the network in order to allow transaction visibility for specific stakeholders only

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Questions 24

What is the best description of how Kafka is utilized for consensus approach in Hyperledger Fabric?

Options:

A.

Kafka does not support crash tolerance but it does not offer protection against rogue nodes in the network.

B.

Provides Byzantine fault tolerance. Finality happens in a matter of seconds. Scale to petabytes of data, distributed across many clusters.

C.

Provides Byzantine fault tolerance. Finality happens in a matter of seconds.

D.

Permissioned voting based Leader does ordering. Only in-sync replicas can be voted as leader.

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Questions 25

Every time there is a change in state of asset a/an___________gets added to DLT

Options:

A.

Entry

B.

Transaction

C.

value

D.

Line item

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Questions 26

Hyperledger Fabric Composer allows for an easy front end application development experience without having to know the network internal application structure.

How is this done in Hyperledger Fabric? 

Options:

A.

LoopBack connector for business networks exposes a running network as a RPC API which can easily be consumed by client applications and integrate non-blockchain applications.

B.

LoopBack connector for business networks exposes a running network as a SOAP API which can easily be consumed by client applications and integrate non-blockchain applications.

C.

LoopBack connector for business networks exposes a running network as a SOAP or RESTFUL API which can easily be consumed by client applications and integrate non-blockchain applications.

D.

LoopBack connector for business networks exposes a running network as a REST API which can easily be consumed by client applications and integrate non-blockchain applications.

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Questions 27

Exhibit.

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

Options:

A.

main.

B.

Invoke

C.

Init

D.

get

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Questions 28

Which of the following is a role in Fabric that has permission to create transactions and query network data?

Options:

A.

Chain Transactor

B.

Chain Administrator

C.

Chain Auditor

D.

Chain Member

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Questions 29

Which of the following would not be a good use case for Hyperledger Fabric?

Options:

A.

Cryptocurrency Exchange

B.

Compliance Ledger

C.

Business Contracts

D.

Asset Exchange

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Exam Code: CBDH
Exam Name: BTA Certified Blockchain Developer – Hyperledger
Last Update: Nov 21, 2024
Questions: 195

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