Which of the following elements are required for implementing a database copy? There are 2 correct answers to this question.
A . The target database must have a the same or higher version than the source database.
B . You don’t have to be concerned about disk space and memory of the target database.
C . Source and target databases can have different number and types of services.
D . A data backup (file-based backups or backups using a third-party backup tool) or a storage snapshot of the source system is available.
Answer: A,D