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Question # 4

Hyperledger Fabric essentially implements a private validator network protocol.

Which of the following statements are true?

A.

None of the entities in a network must register with membership services to obtain with access and transaction authority on the network.

B.

Selected entities in a network must register with membership services to obtain an identity with access and transaction authority on the network.

C.

All the entities in a network must register with membership services to obtain an identity with access and transaction authority in the network.

D.

Selected entities in a network must register with Reputation Manager to obtain an identity with access and transaction authority on the network.

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Question # 5

What does REST stand for?

A.

REST (Restructured State Transfer)

B.

REST (Restructured State Transmission)

C.

REST (Representational State Transmission)

D.

REST (Real Time State Transfer)

E.

REST (Representational State Transfer)

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Question # 6

Asset state data is immutable i.e., once asset data is written to the state data (world state) it cannot be changed.

A.

FALSE

B.

TRUE

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Question # 7

Transaction Log Data is immutable i.e , once its written to the log it cannot be changed or deleted.

A.

TRUE

B.

FALSE

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Question # 8

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 # 9

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

A.

A pointer to a contract class

B.

A bidirectional resource

C.

Expedited delivery

D.

A unidirectional relationship

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Question # 10

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 # 11

What is the initial setup of a network which policies, system chaincodes, and cryptographic materials (certs) are disseminated amongst participants are defined to establish trust?

A.

Chaining

B.

Instantiaton

C.

Bootstrapping

D.

Subnetting

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Question # 12

A business wants only certain parties using the DLT to have visibility/access to their data. This refers to the______challenge

A.

Standardization

B.

Interoperability

C.

Privacy

D.

Confidentiality

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Question # 13

What Hyperledger tool is a blockchain benchmark tool that allows users to measure performance of a specific implementation with predefined use cases?

A.

Cello

B.

Explorer

C.

Caliper

D.

Composer

E.

Quilt

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Question # 14

Consensus algorithms are used because _______________

A.

They can include specific rules or conditions to be met

B.

They increase the network security from hacking

C.

They prevent blockchain node failure

D.

They increase network speed

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Question # 15

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 # 16

Exhibit.

Based on the permissions .acl displayed, which rule allows the administrator access to the users resources.

A.

NetworkAdminUser

B.

Default

C.

NetworkAdminSystem

D.

SystemACL

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Question # 17

Reviewing the code below what are the two possible outcomes of the functions? (Select two.)

A.

Success

B.

Shim.Error

C.

Shim.Success

D.

Error

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Question # 18

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 # 19

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

A.

ChaincodeStubInterface.getFunctionAndParameters

B.

ChaincodelLedgerInterface.PlaceState

C.

ChaincodeStubInterface.PlaceState

D.

ChaincodeStubInterface.PutState

E.

ChaincodeLedgerInterfaceStoreState

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Question # 20

In Hyperledger Fabric Composer, what testing tools are available?

A.

Mocha

B.

Chai

C.

Both A and B

D.

Neither A nor B

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Question # 21

One essential element of blockchain technology is the availability of cryptocurrency that can be used as value token on the DLT platform.

A.

TRUE

B.

FALSE

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Question # 22

Hyperledger Fabric allows multiple certification authorities to be setup for a business network application.

E.g., it there are 3 members using the network application, all 3 members can issue certificates to their employees so they can initiate transactions on the network

application.

A.

TRUE

B.

FALSE

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Question # 23

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 # 24

What certificate is granted an "allocation" of transaction certificates to each user?  

A.

rootcert

B.

ecerts

C.

tcerts

D.

PKI

E.

RSA

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Question # 25

There are currently three supported ordering services in Hyperledger Fabric. (Select three.)

A.

BFT

B.

PoET

C.

SBFT

D.

Kafka

E.

SOLO

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Question # 26

Model defines the representation of

A.

Assets

B.

Participants

C.

Transactions

D.

Events

E.

All of the above

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Question # 27

_________is called to update or query the ledger in a proposal transaction. This is called by the chaincode.

A.

Initialize

B.

Init

C.

Update

D.

Invoke

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Question # 28

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

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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Question # 29

When the distributed ledger has been updated and all nodes maintain their own identical copy of the ledger, what were the nodes reached?

A.

Perfection

B.

Consensus

C.

Replication

D.

Agreement

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