Below is few question Dump for R3 Corda 4 Developer Certification
1) When is a notary NOT required to notarize a transaction?
Answer : When the transaction has no input states and no timewindow
2) Which parts of a transaction does a non-validating notary see when signing a transaction?
Answer : The input state references, the TimeWindow, and the transaction’s notary
3) Each node receives the evidence of all of the historical transaction history during verification.
Answer : TRUE
4) How does Corda ensure each output state is only consumed once?
Answer : Each Notary maintains a list of state refs that have already been consumed.
5) Which of the following types of verification must go in the flow?
Answer : Checking that the signatures on the Transaction are valid.
6) Transactions can have inputs states that are assigned to different Notaries.
Answer : FALSE
7) Which Notary(s) have to sign when reassigning States with the NotaryChangeFlow?
Answer : Original Notary
8) Validation Consensus is achieved by walking the transaction chain back and re-verifying each transaction
Answer : TRUE
9) Corda has strict consensus policy that does not allow any variation with the consensus algorithms. That reason is that it may hinder the security of the network.
Answer : FALSE
10) The different Notary clusters that are in the same network has to run the same consensus algorithm.
Answer : FALSE