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System Architecture & Design Flashcards

7 cards from real CBDH practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 System Architecture & Design flashcards as text

  1. Two of five consortium members need to share confidential pricing while others still see the transaction occurred. Which design fits best?

    Answer: A private data collection for the two organizations

    A private data collection shares data only with the two orgs while the hash remains verifiable on the channel.

  2. An application needs complex JSON queries such as by owner and status. Which state database choice is appropriate?

    Answer: CouchDB

    CouchDB enables rich selector queries on JSON state.

  3. A Raft ordering service has 5 nodes. How many node failures can it tolerate while still ordering?

    Answer: 2

    Raft needs a majority, which is 3 of 5, so it tolerates 2 failures.

  4. Which endorsement policy requires signatures from both Org1 and Org2 peers?

    Answer: AND('Org1.peer','Org2.peer')

    AND requires every listed principal to endorse.

  5. An application must record large PDF contracts. What is the recommended architecture?

    Answer: Store the file off-chain and put its hash and metadata on the ledger

    Large payloads belong off-chain, with the hash on-chain providing integrity proof.

  6. What does the Fabric Gateway introduced in v2.4 simplify for client applications?

    Answer: Transaction submission by offloading endorsement collection and orderer submission to the peer

    The Gateway service in the peer handles endorsement and submission, thinning client SDK logic.

  7. What are the two main components of a Fabric peer's ledger?

    Answer: Blockchain and world state

    The ledger comprises the immutable block log plus the world state holding current key values.

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Sources & references

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  1. blockchaintrainingalliance.com — Test delivery, passing score, score release, test dates, fees, exam format, time limit · verified Oct 2026