【多选题】The session of user SCOTT receives the following error after executing an UPDATE command onthe EMP table: ERROR at line 1: ORA-00060: deadlock detected while waiting for resource On investigation, ...
A.
The session is terminated after receiving the error and JIM can continue with his transaction.
B.
SCOTT should perform a COMMIT or ROLLBACK to allow JIM to continue with his transaction.
C.
The session is rolled back after receiving the error and JIM can continue with his transaction.
D.
SCOTT has to reexecute the last command in the transaction after he commits the transaction.
【单选题】Using FTP passive mode, after the client opens thecommand channel (port 21) to the FTP server and requests passive mode, what will be the next step? ()
A.
The FTP server sends back an acknowledgment (ACK) to the client
B.
The FTP server allocates a port touse for the data channel and transmit that port number to the client
C.
The FTP server opens the data channel to the client using the port number indicated by the client
D.
The FTP client opens the data channel to the FTP server on Port 20
E.
The FTP client opens the datachannel to the FTP server on Port 21