Blockchain CBSA Exam Practice Test Instant Access

Question 1

Contracts live on the blockchain in an Ethereum-specific binary format called _____________?

AEOS

BEVM Code

CEther

DGas

EEVM Bytecode

Answer : E

The Ethereum Virtual Machine (EVM) is the runtime environment for smart contracts in Ethereum. It is not only sandboxed, but actually completely isolated, which means that code running inside the EVM has no access to network, filesystem, or other processes. Smart contracts even have limited access to other smart contracts.

Question 2

In Hyperledger Fabric chaincode runs in a secured Docker container isolated from the endorsing peer process?

ATRUE

BFALSE

Answer : A

Question 3

Hyperledger Composer has two main components.

What are the two components? (Select two.)

AFabric

BSawtooth

CPlayground

DExplorer

EBusiness Network Archive

FSDK

Answer : C, E

Hyperledger Composer has following main components: 1) Business Network Archive: Capturing the core data in a business network, including the business model, transaction logic, and access controls, the Business Network Archive packages these elements up and deploys them to a runtime. Business Network Archive files are stored as ''.bna'' files. 2) Composer Playground: This 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. The playground keeps the development model in browser storage, allowing them to be easily uploaded or downloaded. The playground also allows for CRUD (create, read, update, delete) operations to be performed on asset transactions which are created and logged. Composer playground offers a repository of sample business networks that can provide a base for building your own business network

Question 4

How many peers in the network need to endorse a transaction in a Hyperledger Fabric blockchain?

AThe number of peers required to endorse a transaction is driven by the IAM policy that is specified by the ledger.

BThe number of peers required to endorse a transaction is driven by the endorsement policy that is specified by the DApps.

CThe number of peers required to endorse a transaction is driven by the endorsement policy that is specified by the ledger.

DThe number of peers required to endorse a transaction is driven by the endorsement policy that is specified at chaincode deployment time.

Answer : D

The number of peers required to endorse a transaction is driven by the endorsement policy that is specified at chaincode deployment time.

Question 5

The___________________ is the runtime environment for smart contracts in Ethereum?

AMetamask

BEther

CMist

DEVM

Answer : D

EVM The Ethereum Virtual Machine (EVM) is the runtime environment for smart contracts in Ethereum. It is not only sandboxed, but actually completely isolated, which means that code running inside the EVM has no access to network, filesystem, or other processes. Smart contracts even have limited access to other smart contracts.

Question 6

Which factor influences the gas cost to deploy a Smart Contact on the Ethereum blockchain?

ANone. Smart Contract deployment has a fixed gas cost

BThe types of operations written in code within the Smart Contract

CThe current Ethereum market conditions

DThe total size of the complied Smart Contract measured in kilobytes

Answer : D

Question 7

Which of the following cryptocurrencies use an alternate consensus method called "Scrypt" to BTC's Proof of Work (POW) SHA-256 algorithm?

ARipple

BPeercoin

CLitecoin

DSteemit

Answer : C

The Scrypt hash function was initially implemented by the Litecoin development team to avoid what are known, ASICs, from being able mine its cryptocurrency. When mining for cryptocurrencies, users typically have an option between: a CPU, GPU or ASIC miner.

Blockchain CBSA BTA Certified Blockchain Solution Architect Exam Practice Test