HFCP: Hyperledger Fabric Certified PractitionerDemo

By Linux Foundation · Question Mode

QuestionQ30

Smart Contracts

After the transaction containing the delState("A") function is committed, what occurs to the ledger and state database?

  • A getstate("A") function returns the current state of the key "A".
  • B The deleting transaction sets an empty value to the key "A" in the write set.
  • C The state of the key "A" is removed from the state database, but its history remains in the ledger.
  • D All transaction histories which updated the state "A" are deleted from the ledger.
Explanation

delState deletes the specified key from the committed current state (world-state database). Fabric’s blockchain is an immutable record of state transitions, so deleting the current state does not delete the key’s transaction history from the ledger.

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