When Using a DBMS in a File Server Environment

Multiple Choice

When using a DBMS in a file server environment:

A) data security checks and file and record locking are done at the file server
B) data security checks and file and record locking are done on the mainframe
C) data security checks and file and record locking are done at the client PCs
D) data security checks are performed at the file server,and file and record locking are done at the client PCs