Two-Phase Locking Questions

Practice Two-Phase Locking Questions –

Which one is correct statement? Logical data independence provides following without changing application programs: 

(i) Changes in access methods.
(ii) Adding new entities in database
(iii) Splitting an existing record into two or more records
(iv) Changing storage medium

Practice Two-Phase Locking Questions –

In a two-phase locking protocol, a transaction release locks in ……… phase.

Practice Two-Phase Locking Questions –

In two-phase locking protocol, a transaction obta+A120ins locks in ……..phase.