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Oracle 1Z0-042 Exam Syllabus Topics:

Oracle database 10g:Administration I Sample Questions:

Question 1

The SCOTT user has an index on the ITEM_DESC column of the ITEM table. As part of the year-ending task, SCOTT updates the ITEM_DESC column for most of the rows in the ITEM table. How does this change to the table affect the index?

A. The leaf block containing the row to be updated is marked as invalid.
B. An update in a leaf row takes place.
C. A row in the leaf block of the index for the key value is deleted and inserted.
D. The index becomes invalid after the update.

Question 2

In your Oracle 10g database , you have scheduled a job to update the optimizer statistics at 05:00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected? (Choose three.)

A. average row size
B. size of table in database blocks
C. size of table in bytes
D. number of free blocks in the free list
E. number of extents present in the table
F. last analyzed date

Question 3

Which two statements are true about a bitmap index? (Choose two.)

A. It has a bitmap segment for each distinct value in the key column, containing a string of bits in which each bit represents the presence or absence of a key column value.
B. It can be converted to a B-tree index by using the ALTER INDEX command.
C. Updating the key column locks the whole bitmap segment that contains the bit for the key value to be updated.
D. It is recommended for the columns that have unique values.

Question 4

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

Question 5

You executed the following command to back up your control file:
ALTER DATABASE BACKUP CONTROLFILE TO TRACE;
Which initialization parameter is used to specify the location of the trace file?

A. TRACE_DUMP_DEST
B. CORE_DUMP_DEST
C. BACKUP_DUMP_DEST
D. USER_DUMP_DEST
E. BACKGROUND_DUMP_DEST

Solutions: