CBDH問題集、Blockchain実際の試験問題

質問 1

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

A. Having a POW mining algorithm

B. Having a modular component structure

C. Ability to use your programs from SQL

D. Having a native token

正解: B

解説: (PassTest メンバーにのみ表示されます)

質問 2

Consensus algorithms are used because _______________

A. They increase network speed

B. They can include specific rules or conditions to be met

C. They increase the network security from hacking

D. They prevent blockchain node failure

正解: B

質問 3

What is the best definition of chaincode with Hyperledger?

A. Chaincode is centralized transactional program, running on the validating nodes.

B. Chaincode is a decentralized transactional program, running one the validating nodes.

C. Chaincode is centralized transactional program, running on the peer nodes.

D. Chaincode is a decentralized transactional program, running on the peer nodes.

正解: B

質問 4

Chaincode in Hyperledger Fabric is a decentralized transactional program which is running on the validating nodes. Chaincode implements the Chaincode interface in particular, Init and Invoke functions.
Which two statements about Chaincode is correct? (Select two.)

A. Init is called during instantiate transaction after the chaincode container has been established for the first time, allowing the chaincode to initialize its internal data

B. Invoke is called to update or query the ledger in a proposal transaction. Updated state variables are not committed to the ledger until the transaction is committed.

C. Invoke is called to update or query the ledger after a proposal transaction. Update state variables are committed to the ledger before the transaction is committed

D. Init is called during Instantiate transaction after the chaincode ledger has been established for the first time, allowing the chaincode to initialize its internal data

正解: A,B

解説: (PassTest メンバーにのみ表示されます)

質問 5

In Hyperledger Fabric, there are three types of peer nodes depending upon the assigned roles.
What are three types? (Choose three.)

A. Committing Peer

B. MSP Peer

C. Client peer

D. Endorsing Peer

E. Ordering Peer

F. Peer

G. Channel Peer

正解: D,E,F

解説: (PassTest メンバーにのみ表示されます)

質問 6

Exhibit.

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

A. Invoke

B. Init

C. main.

D. get

正解: C

質問 7

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

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 "locked down".

D. Docker provides a secured, lightweight method to sandbox chaincode execution that is not "locked down"

正解: C

解説: (PassTest メンバーにのみ表示されます)

質問 8

The CA (Certificate Authority) in Hyperledger Fabric issues the certificates. These certificates are used for identity validation and for transmission of encrypted data that only the owner (person, organization or software) of a specific certificate is able to decrypt and read.
What types of certificates are issued by the CA?

A. tcert

B. rootcert

C. ecert

正解: A,B,C

解説: (PassTest メンバーにのみ表示されます)

質問 9

What is a web-based tool allows developers to learn Hyperledger Composer, model out their business network (domain), test that network, and deploy that network to a live instance of a blockchain network?

A. Hyperledger Composer Playground

B. Hyperledger Explorer

C. Hyperledger Composer Runtime

D. Hyperledger Quilt

正解: A

解説: (PassTest メンバーにのみ表示されます)

質問 10

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

A. Hyperledger Cello

B. Hyperledger Explorer

C. Hyperledger Caliper

D. Hyperledger Quilt

正解: C

解説: (PassTest メンバーにのみ表示されます)

質問 11

You would like to download Hyperledger Fabric.
What would be the command to start the process?

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

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

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

正解: C

解説: (PassTest メンバーにのみ表示されます)

質問 12

Chaincode Services uses___________________ to host (deploy) the chaincode.
What does Chaincode services in Hyperledger use?

A. Virtual Machines

B. Deployment Manager

C. Docker

D. Yaml

E. Kubernetes

正解: C

解説: (PassTest メンバーにのみ表示されます)

質問 13

What component of Hyperledger Composer captures the core data in a business network including the business model, transaction logic, and access controls?

A. Business Network Interface

B. Business Network API

C. Business Network Adapter

D. Business Network Card

E. Business Network Archive

正解: E

解説: (PassTest メンバーにのみ表示されます)

質問 14

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

A. file system

B. JSON based storage

C. registry

D. database

正解: D

Blockchain BTA Certified Blockchain Developer - Hyperledger - CBDH 模擬練習