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Oracle database 10g:Administration I Sample Questions:

1. Which two statements are true about the primary key constraint in a table? (Choose two.)

A) It is possible to have more than one primary key constraint in a single table.
B) The non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.
C) The primary key constraint can be referred by only one foreign key constraint.
D) The primary key constraint can be imposed by combining more than one column.
E) It is not possible to disable the primary key constraint.

2. Your database is open and users are connected using the LISTENER listener. The new DBA of the system stops the listener by using the following command:
LSNRCTL> STOP
What would happen to the sessions that are presently connected to the database instance?

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

3. After being hired as a database administrator, you find that there is only one database that is functional and that is being accessed by the applications. You want to create a replica of the database, to be used for testing purposes. What is the best method to create the replica?

A) create a database by using CREATE DATABASE .. command and manually copy the data
B) use Database Configuration Assistant (DBCA) to create a template from the existing database to contain the database structure
C) use DBCA to create a template from the existing database to contain the database structure and then manually copy the data using Oracle Data Pump
D) use DBCA to create a template from the existing database to contain the database structure with data files and then use the same template to create the database in the new location

4. Your database is functional with peak load for one hour. You want to preserve the performance statistics collected during this period so that they can be used for comparison while analyzing the performance of the database in the future. What action would you take to achieve this task?

A) Create a baseline on a pair of snapshots that have the statistics of the peak-load period in the database.
B) Decrease the snapshot interval in the AWR to collect more number of snapshots during the peak-load period.
C) Set the snapshot retention period in the Automatic Workload Repository (AWR) to zero to avoid the automatic purging of the snapshots.
D) Set the STATISTICS_LEVEL initialization parameter to ALL.

5. View the Exhibit and examine the output.
Which statement describes the conclusion?

A) Preparing indexes on the tables used in the SQL statements would improve the library cache performance.
B) The users should use bind variables instead of literals in the query.
C) The dictionary cache is consuming more space than the library cache.
D) The shared pool size should be increased to accommodate the SQL statements.

Solutions: