1Z0-052單項(xiàng)選擇題每日一練(2019.05.09)

View the Exhibit.

What would happen if Oracle Home is not empty（）

You executed the following command to perform a backup of the USERS tablespace： 
SQL> ALTER TABLESPACE users BEGIN BACKUP；
ALTER TABLESPACE users BEGIN BACKUP * 
ERROR at line 1： 
ORA-01123： cannot start online backup； media recovery not enabled 
What could be the reason for this error（）

You are using flat files as the data source for one of your data warehousing applications. To optimizethe application performance， you plan to move the data from the flat files toclustered tablesin an Oracle database. 
While migrating the data， you want to have minimal impact on the database performance and optimize thedata load operation.
Which method would you use to load data into the Oracle database（）

You executed the following commands in an RMAN session for your database instance that has failures： 
RMAN> LIST FAILURE； 
After some time， you executed the following command in the same session： RMAN> ADVISE FAILURE； 
But there are new failures recorded in the Automatic Diagnostic Repository （ADR） after the execution ofthe last LIST FAILURE command. 
Which statement is true for the above ADVISE FAILURE command in this scenario（）

You executed the command to create a password file in the database server： $ orapwd file=orapworcl entries=5ignorecase=N 
Which statement describes the purpose of the above password file（）