HFCP VALID TEST ANSWERS - HFCP EXAM MATERIAL

HFCP Valid Test Answers - HFCP Exam Material

HFCP Valid Test Answers - HFCP Exam Material

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Tags: HFCP Valid Test Answers, HFCP Exam Material, HFCP Reliable Test Simulator, HFCP Real Braindumps, Test HFCP Guide Online

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Linux Foundation Hyperledger Fabric Certified Practitioner (HFCP) Exam Sample Questions (Q10-Q15):

NEW QUESTION # 10
When executing queries on the ledger, what is the difference between simple and composite keys?

  • A. Composite keys allow for more complex queries than simple keys.
  • B. Simple keys allow for more complex queries than composite keys.
  • C. Simple Keys and composite Keys function the same way when executing queries on the ledger
  • D. Simple keys and composite keys are not used when executing queries on the ledger.

Answer: A

Explanation:
In Hyperledger Fabric, when executing queries on the ledger, the difference between simple keys and composite keys is significant. Simple keys consist of a single attribute and are straightforward in their use for querying. In contrast, composite keys are formed by combining multiple attributes into a single key, allowing for more complex queries based on multiple fields. Composite keys enable richer, more flexible query capabilities that can facilitate refined searches and analyses within the ledger. This capability is particularly useful in scenarios where a single attribute is not sufficient to uniquely identify ledger entries or when queries need to filter based on multiple criteria.


NEW QUESTION # 11
What happens if the user submits a transaction with no matching function?

  • A. The peer will have rejected the transaction.
  • B. The unknownTransaction function is called.
  • C. Nothing, the transaction is ignored.
  • D. The first transaction function is called.

Answer: B

Explanation:
In Hyperledger Fabric, if a user submits a transaction with no matching function specified in the smart contract, theunknownTransactionfunction is invoked by default. This function serves as a catch-all method that can be used to handle cases where the transaction type is not recognized, providing a mechanism to manage or log these occurrences effectively .


NEW QUESTION # 12
When reading and modifying the ledger state in Hyperledger Fabric, what type of schema does the data stored in the ledger need to adhere if the state database is LevelDB?

  • A. XML schema
  • B. No specific schema is required
  • C. JSON schema
  • D. CSV schema

Answer: B

Explanation:
When using LevelDB as the state database in Hyperledger Fabric, there is no specific schema that the data stored in the ledger needs to adhere to. LevelDB is a key-value store, which does not enforce any schema on the data it holds. This flexibility allows applications to define their own formats and structures for the data they store, which can vary from simple strings and numbers to more complex serialized data structures. This schema-less nature of LevelDB enables developers to implement the data handling that best suits their application's needs without the constraints of a predefined database schema.


NEW QUESTION # 13
Which concept of the RAFT ordering service relates to the ingestion of new log entries; their replication to other ordering nodes; and managing when an entry is considered committed?

  • A. Leader
  • B. Endorsement
  • C. Quorum
  • D. Consenter set

Answer: A

Explanation:
In the RAFT ordering service within Hyperledger Fabric, the concept of the "Leader" is crucial for the ingestion of new log entries, their replication to other ordering nodes, and managing when an entry is considered committed. In a RAFT-based ordering service, the leader node is responsible for managing the log entries; it receives all client requests, appends them to its log, and replicates these logs to the follower nodes.
The leader also plays a crucial role in ensuring that there is a consensus on the order of transactions before they are committed to the ledger. The leader is dynamically elected by the cluster nodes and can change due to network conditions or node failures. This role is pivotal in the RAFT consensus mechanism for maintaining a consistent and reliable ordering service.


NEW QUESTION # 14
What Fabric Gateway client API call could a client application use to update ledger state?

  • A. Evaluate
  • B. Submit
  • C. Invoke
  • D. Update

Answer: B

Explanation:
In the context of the Fabric Gateway client API, the call that a client application would use to update the ledger state is Submit1. The Submit function combines the actions of endorsing a transaction proposal, submitting the transaction to the ordering service, and waiting for the transaction to be committed to the ledger into a single blocking call. This simplifies the process for the client application, allowing it to update the ledger state with a single line of code. The Evaluate call, on the other hand, is used to query the current state of the ledger without making any updates2. There are no Invoke or Update calls in the Fabric Gateway client API as per the official documentation


NEW QUESTION # 15
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