CBDH Performance Monitoring & Optimization 5

Question 1

How does choosing a MAJORITY endorsement policy instead of AND across all orgs affect performance?

Accepted Answer

It requires fewer endorsements, cutting latency and failure risk

Answer

Fewer required endorsers means fewer round trips and tolerance of an unavailable org.

Question 2

What advantage does the Fabric Gateway service (v2.4+) bring to client applications?

Accepted Answer

Peers handle endorsement routing and submission, simplifying and lightening the client

Answer

The Gateway offloads endorsement orchestration and submission to the peer, reducing client SDK work.

Question 3

What is a recommended client-side practice for higher throughput?

Accepted Answer

Reuse long-lived gateway or gRPC connections

Answer

Reusing connections avoids repeated connection setup costs, and submitting asynchronously increases concurrency.

Question 4

How do private data collections affect data dissemination?

Accepted Answer

Private data goes only to authorized peers, and only a hash is placed on the channel ledger

Answer

Private data is gossiped only to collection members, with a hash recorded in the block.

Question 5

What does the validation code MVCC_READ_CONFLICT indicate?

Accepted Answer

A key read by the transaction was changed by an earlier transaction before commit

Answer

The read-set version no longer matched the committed state version at validation time.

CBDH - Certified Blockchain Developer Hyperledger Practice Test