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  • Exam Name: BTA Certified Blockchain Developer – Hyperledger
  • Last Update: May 22, 2024
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CBDH Practice Exam Questions with Answers BTA Certified Blockchain Developer – Hyperledger Certification

Question # 6

Blockchain services in Hyperledger Fabric manages the distributed ledger through a peer to peer protocol that is built on ______?

A.

HTTP/2

B.

TLS and SSL

C.

TLS

D.

HTTP/1

E.

SSL

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Question # 7

The chaincode’s interface implements which of the following functions?

A.

Invoke and Close

B.

Invoke and Revoke

C.

Open and Shut

D.

Open and Close

E.

Invoke and Init

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Question # 8

Instances of an asset created in Hyperledger Fabric are managed in a_________.

A.

registry

B.

JSON based storage

C.

database

D.

file system

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Question # 9

Which of the characteristic is desired in a DLT for business?

A.

Permissioned

B.

Confidential Transaction

C.

No Cryptocurrency

D.

Programmable

E.

All of the above

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Question # 10

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

A.

Composer, Fabric and Chaincode

B.

Sawtooth, Fabric and Indy

C.

Blockchain, Registration, Identity

D.

Blockchain, Chaincode and Membership

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Question # 11

Which of the following statements would be true regarding Hyperledger Composer Playground? 

A.

Composer Playground allows for CRUD (create, read, update, delete) operations to be performed on asset transactions which are logged but not created.

B.

Composer Playground allows for CRUD (create, read, update, delete) operations to be performed on asset transactions which are stored in the database and logged.

C.

Composer Playground allows for CRUD (create, read, update, delete) operations to be performed on asset transactions which are created but lot logger.

D.

Composer Playground allows for CRUD (create, read, update, delete) operations to be performed on asset transactions which are created and logged.

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Question # 12

Exhibit.

CBDH question answer

The function displayed:

A.

Stores the keys and values on the ledger on initilization

B.

Reads and returns the keys and values on the ledger

C.

Removes the keys and values on the ledger

D.

Updates the keys and values on the execution of Invoke

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Question # 13

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?

A.

PoET

B.

Kafks

C.

SOLO

D.

SBFT

E.

BFT

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Question # 14

In Hyperledger not all Nodes are created equal. What are the three distinct types of nodes? (Select three.)

A.

MSP Nodes

B.

Ordered Nodes

C.

Channel Node

D.

Client Nodes

E.

Peer Nodes

F.

Endorser Node

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Question # 15

The Hyperledger Project has a modular umbrella schema to its organization which includes three parts of the organizational schema. As part of the organizational schema, it includes an “Infrastructure” Module that is structured with four layers.

What layer below is NOT part of the structure? 

A.

Architecture

B.

Organizational

C.

Legal

D.

Technical

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Question # 16

Member in the context of Hyperledger DLT network refers to:

A.

Legally separate / Independent entities

B.

Entities involved in transactions

C.

Business sponsor of DLT application

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Question # 17

In Hyperledger, each customer, participant, or vendor can have their own ledger on the blockchain This is called:

A.

Independence

B.

Channels

C.

Chamcode

D.

Isolationism

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Question # 18

The concept of a node is common in most blockchains. Which of the following about nodes is INCORRECT? 

A.

Nodes need a valid certificate to be able to communicate to the network

B.

Nodes connect to other nodes and that is how a blockchain is formed

C.

These three types of nodes. Client, peer and Ordered

D.

Nodes use a type of client server protocol for keeping the distributed ledger in sync across the network

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Question # 19

The Hyperledger Project Framework of blockchains is meant for specific use cases for enterprise.

Which blockchain includes a novel consensus algorithm, Proof of Elapsed Time (PoET)?

A.

Hyperledger Iroha

B.

Hyperledger Fabric

C.

Hyperledger Indy

D.

Hyperledger Sawtooth

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Question # 20

Exhibit.

CBDH question answer

The lowercase "o" in the code snippet indicates:

A.

An attribute of the asset

B.

A relationship to the asset

C.

Both A and B

D.

Neither A nor B

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Question # 21

Exhibit.

CBDH question answer

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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Question # 22

Hyperledger blockchain frameworks reach consensus by performing two separate activities.

What are the two activities? (Select two.)

A.

Updating Transactions

B.

Validating Transactions

C.

Ordering Transactions

D.

Writing Transactions

E.

Packing Transactions

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Question # 23

What type of certificates act as secure identifiers, digital passports which contain information about the owner in Hyperledger Fabric certificate management?

A.

RSA

B.

PEM

C.

PKI

D.

X509

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Question # 24

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

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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Question # 25

Hyperledger supports two types of transactions. What are the two types? (Select two.)

A.

Code Provisioning Transaction

B.

Code Provisioning Transaction

C.

Code Deploying Transaction

D.

Code Invoking Transaction

E.

Code Declaring Transaction

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Question # 26

Exhibit.

CBDH question answer

Based on the code snippet displayed, what does the following line do

return assetRegistry.update(transfer.stock) ;

A.

Updates the world state database

B.

Persists the state of the asset to the blockchain ledger

C.

Updates the assetRegistry variable

D.

Returns the assetRegistry to the transfer, stock

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Question # 27

There are two popular approaches to defining assets in most blockchain solutions. (Select two.)

A.

Stateless UTXO model, where account balances are encoded into past transaction records.

B.

Account model, where account balances are kept in state storage space in memory registers.

C.

Stateful UTXO model, where account balances are encoded into past transaction records.

D.

Account model, where account balances are kept in stateless storage space on the ledger.

E.

Stateless UTXO model, where account balances are encoded into current transaction records.

F.

Account model, where account balances are kept in state storage space on the ledger.

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Question # 28

Hyperledger Fabric is a blockchain implementation that is designed for deploying a modular and extensible architecture.

Which of the following is NOT true about the architecture of Hyperledger? 

A.

It is modular and extensible

B.

It allows for interoperability

C.

It has a native cryptocurrency token

D.

It has a rich API development capacity

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Question # 29

What type of organization can be thought of as a corporation run without any human involvement under the control of an incorruptible set of business rules?

A.

Limited Liability Corporation

B.

Decentralized Autonomous Organization (DAO)

C.

Corporation

D.

Trust

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Question # 30

Which of the following statements would be the best answer when it comes to channels and the use of ordering services in Hyperledger Fabric?

A.

Channels ensure privacy in a blockchain network and ordering services may support many channels not just one channel.

B.

Channels ensure privacy in a blockchain network and ordering services may not support more than one channel.

C.

Channels do not ensure privacy in a blockchain and ordering services may not support more than one channel.

D.

Channels do not ensure privacy in a blockchain and ordering services may support many channels not just one channel.

E.

Channels do not ensure privacy in a blockchain network and ordering services may support many channels not just one channel.

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Question # 31

The Hyperledger Fabric framework is implemented on what programming environment?

A.

C++

B.

Node.js

C.

Go

D.

PHP

E.

Javascript

F.

Python

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Question # 32

Which of the following syntaxes will compile the chaincode?

A.

go int

B.

go build

C.

go create

D.

go compile

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Question # 33

The Hyperledger Project consists of the following EXCEPT?

A.

Infrastructure

B.

Tools

C.

Framework

D.

Management

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Question # 34

Where are models stored when you develop a business network application model on Playground?

A.

On the web server hosting the Playground

B.

File system

C.

Browser storage

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Question # 35

Which Hyperledger tool would you select to invoke, deploy or query blocks, transactions and associated data, network information (name, status, list of nodes), chain codes and transaction families, as well as other relevant information stored in the ledger?

A.

Hyperledger Quilt

B.

Hyperledger Cello

C.

Hyperledger Caliper

D.

Hyperledger Explorer

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Question # 36

Query is called whenever you query your chaincode's state.   Queries do not result in blocks being added to the chain, and you cannot use certain functions.

Which function can you not use inside a Query? 

A.

Error

B.

Getstate

C.

Putstate

D.

Read

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Question # 37

When creating a network according to an organization's structure and also bootstrap a channel what are the following artifacts we would need to generate? 

A.

Genesis Block, License File and Anchor Peer Configs for each organization.

B.

Genesis Block, ledger Configuration and Anchor Peer Configs for each organization.

C.

Genesis Block, Channel Configuration and Anchor Peer Configs for each organization.

D.

Genesis Block, Channel Configuration and Anchor MSP Configs for each organization.

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Question # 38

Based on the code snippet, the reference —> to Contract indicates:

CBDH question answer

A.

A pointer to a contract class

B.

A bidirectional resource

C.

Expedited delivery

D.

A unidirectional relationship

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Question # 39

What type of node commits transactions & keeps the data in sync across the ledger?

A.

Committed

B.

Endorsed

C.

Client

D.

Peer

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Question # 40

Exhibit.

CBDH question answer

Based on the chaincode displayed, which function returns the value of the specified asset key?

A.

main

B.

Init

C.

Invoke

D.

get

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Question # 41

In Hyperledger Fabric, miners are called?

A.

Committer Peer

B.

There are no miners in Hyperledger

C.

Endorser Node

D.

Channels

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Question # 42

Chaincode with Hyperledger Fabric can be written in what development languages? Select All that apply.

A.

Node.js

B.

Go

C.

Java

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Question # 43

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

A.

Having a modular component structure

B.

Having a native token

C.

Having a POW mining algorithm

D.

Ability to use your programs from SQL

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Question # 44

A ledger has 2 parts, which one is not part of the ledger?

A.

Application log

B.

Transaction log

C.

State data

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Question # 45

Every . cto model file requires a___________which means that every name inside of it must be unique.

A.

namespace

B.

chaincode

C.

participant

D.

asset

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Question # 46

In your model there is a need to determine who owns the asset What type of field would you add to the asset such that owner of the asset instance can be found

A.

array

B.

relationship

C.

enumeration

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Question # 47

In Hyperledger Fabric there is three types of chaincode. (Select three.)

A.

Private

B.

Hybrid

C.

Access Controlled

D.

Consortium

E.

Public

F.

Compliant

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Question # 48

The use of cryptographic hashing with blockchain provides for which of the following?

A.

Providing for flexibility in security design

B.

Providing for ease of analytical insight

C.

Ensuring data blocks are mutable

D.

Ensuring data blocks are immutable

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Question # 49

Exhibit.

CBDH question answer

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

A.

permissions.acl

B.

transfer.model

C.

logic.js

D.

transfer.cto

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Question # 50

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?

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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Question # 51

Which of the following is the BEST definition of Decentralization?

A.

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

B.

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

C.

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

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Question # 52

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?

A.

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

B.

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

C.

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

D.

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

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Question # 53

________________ endorsement allows the default chaincode-level endorsement policies to be overridden by a different policy for the specified keys.

What type of endorsement is this?

A.

Policy Driven

B.

Key-Value

C.

Stateless

D.

State based

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Question # 54

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

A.

FALSE

B.

TRUE

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Question # 55

Concepts, like other resources, can be instantiated

A.

TRUE

B.

FALSE

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Question # 56

You are starting to understand the needed package dependencies for chaincode. What are the two required packages? (Select two.)

A.

Init

B.

Peer Protobuf

C.

Shim

D.

Start

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Question # 57

Please review the chaincode below and select what "import" is specifying.

CBDH question answer

A.

Menu Choices

B.

Installation requirements

C.

Dependencies

D.

Logging requests

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Question # 58

Relationship is created using the symbol:

A.

_>

B.

o

C.

>>

D.

-->

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