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Prepare for the Blockchain BTA Certified Blockchain Developer - Hyperledger exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.
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The questions for CBDH were last updated on Apr 22, 2026.
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When the distributed ledger has been updated and all nodes maintain their own identical copy of the ledger, what were the nodes reached?
Consensus is when the distributed ledger has been updated and all nodes maintain their own identical copy of the ledger. This is also known as the ''World State'' in some blockchains. This architecture allows for a new capacity as a system of recordkeeping that goes beyond being a simple database.
Level DB is the default database for Hyperledger Fabric and is particularly appropriate when ledger states comprise what type of data?
Simple key-value pairs - LevelDB is the default and is particularly appropriate when ledger states are simple key-value pairs. A LevelDB database is closely co-located with a network node -- it is embedded within the same operating system process. CouchDB is a particularly appropriate choice when ledger states are structured as JSON documents because CouchDB supports the rich queries and update of richer data types often found in business transactions. Implementation-wise, CouchDB runs in a separate operating system process, but there is still a 1:1 relation between a network node and a CouchDB instance. All of this is invisible to chaincode.
https://hyperledger-fabric.readthedocs.io/en/release-1.3/ledger/ledger.html
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