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CBDH BTA Certified Blockchain Developer - Hyperledger Exam

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CBDH BTA Certified Blockchain Developer - Hyperledger Exam

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1. What is provided by the Hyperledger Fabric to facilitate network communications?

SDKGolangAPIJava E. Middleware

2. Which Hyperledger Fabric ordering mechanism is recommended for production use?

BFTSOLOSBFTKafka

3. Hyperledger Fabric Consensus is planned out into 3 phases. Which one is NOT a phase?

VotingOrderingValidationEndorsement

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

HTTP/1TLSHTTP/2TLS and SSL

5. Hyperledger is a membership based distributed ledger platform. What determine the level of permissions required to transact for members?

Audit ServicesValidator ServicesAuthentication ServicesIdentity Management

6. Consensus on the Blockchain defines________________

Security between two blocks of dataThe distribution of each data blockBasic security of the blockchainAgreement of a valid transaction by all the network nodes

7. Consensus algorithms are used because _______________

They increase network speedThey can include specific rules or conditions to be metThey increase the network security from hackingThey prevent blockchain node failure

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

CaliperExplorerComposer Cello

9. Which of the following syntaxes will compile the chaincode?

go compilego intgo buildgo create

10. The chaincode

Invoke and CloseOpen and ShutInvoke and Init Invoke and Revoke

11. What must implement every chaincode?

JavaLinux APIsGolangChaincode Interface

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

Business ContractsCryptocurrency ExchangeAsset ExchangeCompliance Ledger

13. What type of peer endorses and executes a transaction?

Bootstrapping

14. 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 statements about Chaincode is correct?

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 committedInit is called during Instantiate transaction after the chaincode ledger has been established for the first time, allowing the chaincode to initialize its internal dataNone.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 / 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

15. Which of the following is the best answer when reviewing a Code Invoking Transaction" in Hyperledger Fabric?"

Code invoking transaction is an REST API call to a chaincode function and is similar to how a URL pattern invokes a servlet in J2EE.Code invoking transaction is an REST API call to a chaincode function and is similar to how a URL pattern invokes a servlet in Node.jsCode invoking transaction is an SOAP API call to a chaincode function and is similar to how a URL pattern invokes a servlet in J2EE.Code invoking transaction is an API call to a chaincode function and is similar to how a URL pattern invokes a servlet in Node.js

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

StartPeer Protobuf - ShimNoneInit

17. Smart contracts are created by computer programmers through the help of smart contract development tools and are entirely digital. These programs are usually written using programming code languages. Which of the following languages would not be ideal for use in smart contracts?

Go E. JavaPythonAssemblerC++

18. 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 CouchDB database is closely co-located with a network node and runs in a separate operating system processA CouchDB database is closely co-located with a network node and it is embedded within the same operating system processA LevelDB database is closely co-located with a network node and it is embedded within the same operating system processA LevelDB database is closely co-located with a network node and runs in a separate operating system process

19. Every chaincode has an ________________ policy which specifies the set of peers on a channel that must execute chaincode and endorse the execution results in order for the transaction to be considered valid.

EndorsementChaincodeValidationTransaction

20. When designing a client application it is important to note that queries are defined in a query file (.qry). Where is this .qry file stored?

Child directory of the business network definition E. Parent directory of the package.json fileChild directory of the package.json file/tmp directory of the package.json fileParent directory of the business network definition

21. 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?

ErrorReadPutstateGetstate

22. Chaincode interface must be implemented by ever chaincode program.

NoneTRUEFALSEMaybe

23. The Hyperledger Project consists of the following EXCEPT?

FrameworkInfrastructureManagement Tools

24. What type of peer executes chaincode?

Ordered PeerChaincode is executed by the clientAnchor peerEndorsing Peer

25. 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?

It has a rich API development capacity It is modular and extensibleIt allows for interoperabilityIt has a native cryptocurrency token

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