Blockchain Exam CBDH Topic 2 Question 62 Discussion

Actual exam question for Blockchain's CBDH exam

Question #: 62
Topic #: 2

[All CBDH Questions]

Which of the following is not a feature of a Hyperledger Fabric ledger?

ARead-only history queries -- Query ledger history for a key, enabling data provenance scenarios

BRead-only queries using a rich query language (if using CouchDB as state database)

CRead-only queries using a rich query language (if using LevelDB as state database)

DQuery and update ledger using key-based lookups, range queries, and composite key queries.

Show Suggested Answer

Suggested Answer: C

Rich Query Language capability is available with CouchDB. What DB is used? The ledger system in Hyperledger fabric uses levelDB. By definition, LevelDB allows concurrent writers to safely insert data into the database by providing internal synchronization State database options include LevelDB and CouchDB. LevelDB is the default key-value state database embedded in the peer process. CouchDB is an optional alternative external state database. (Binary data)

https://hyperledger-fabric.readthedocs.io/en/release-1.3/fabric_model.html

by Marjory at Nov 15, 2022, 08:45 AM

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