our database instance is running. You are not able to access

第1题：

第2题：

our database instance is running. You are not able to access Oracle Enterprise Manager Database Control because the listener is not started.Which tool or utility would you use to start the listener?（）

• A、Oracle Net Manager
• B、Listener Control utility
• C、Database Configuration Assistant
• D、Oracle Net Configuration Assistant

第3题：

第4题：

Your database is open and the LISTENER listener is running. The new DBA of the system stops thelistener by using the command：  LSNRCTL> STOP  What happens to the sessions that are presently connected to the database instance（）

• A、The sessions are able to perform only queries.
• B、The sessions are not affected and continue to function normally.
• C、The sessions are terminated and the active transactions are rolled back.
• D、The sessions are not allowed to perform any operations till the listener is started.

第5题：

Identify two situations in which you can use Data Recovery Advisor for recovery.（） 

• A、 The user has dropped an important table that needs to be recovered.
• B、 The database files are corrupted when the database is open.
• C、 You are not able to start up the database instance because the required database files are missing.
• D、 The archived log files are missing for which backup is not available.

第6题：

The database instance has the following parameter setting： OS_AUTHENT_PREFIX = OPS$ OS_ROLES = FALSE  REMOTE_OS_AUTHENT = FALSE REMOTE_OS_ROLES = FALSE TIMED_OS_STATISTICS = 0  You have a local operating system user SKD. You create a database user OPS$SKD， and then  assignexternal authentication. The user OPS$SKD has the CREATE SESSION privilege.  What would youachieve by the above process（）

• A、The database user OPS$SKD will be able to administer the database.
• B、The authentication detail for the database user OPS$SKD is recorded in the password file.
• C、The local operating system user SKD will be able to access the database instance without specifying the username and password.
• D、The database user OPS$SKD has to login with the password of the local operating system user SKD to access the database instance.

第7题：

Your database is open and the LISTENER listener is running. The new DBA of the system stops the listener byusing the command：LSNRCTL> STOP What happens to the sessions that are presently connected to the database instance（）

• A、The sessions are able to perform only queries.
• B、The sessions are not affected and continue to function normally.
• C、The sessions are terminated and the active transactions are rolled back.
• D、The sessions are not allowed to perform any operations till the listener is started

第8题：

第9题：

You are working on a database， where you have three redo log groups. When the database is down for a backup， an operating system （OS） user deletes all the redo log files in a group. What will happen when you open your database？（）

• A、 The instance starts， the database is mounted， but efforts to open the database fail， and an error about the missing redo log group is displayed.
• B、 Before the instance starts， you receive an error about the missing redo log files of a group.
• C、 The instance starts and the database opens with an error message written to the alert log file.
• D、 The instance starts and the database opens because two redo log groups still exist.
• E、 The instance starts and the database opens， but every attempt to write to redo log files fails with an error.

第10题：

Your database instance is running.You are not able to access Oracle Enterprise Manager Database Control because the listener is not started.Which tool or utility would you use to start the listener?（）

• A、Oracle Net Manager
• B、Listener Control utility
• C、Database Configuration Assistant
• D、Oracle Net Configuration Assistant