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Oracle 1Z0-042 Exam Syllabus Topics:

Oracle database 10g:Administration I Sample Questions:

Question 1

User A executes the following command to update the TRANS table:
SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code='C005';
Before user A issues a COMMIT or ROLLBACK command, user B executes the following
command on the TRANS table:
SQl> ALTER TABLE trans MODIFY (tr_type VARCHAR2(3));
What would happen in this scenario?

A. The transaction for user A is rolled back.
B. The ALTER TABLE command waits until user A ends the transaction.
C. The ALTER TABLE command modifies the column successfully.
D. The ALTER TABLE command fails due to the resource being busy.

Question 2

Which three statements are true regarding the logical structure of the Oracle database? (Choose three.)

A. Multiple tablespaces can share single data file.
B. It is possible to have tablespaces of different block sizes in a database.
C. A data block is the smallest unit of I/O for data files.
D. Each segment contains one or more extents.
E. Each data block in the database always corresponds to one OS block.

Question 3

View the Exhibit and analyze the CREATE TABLE statements used to create the ITEMS and ORDERS tables.
The ITEMS table has 50 rows and ORDERS table has 500 rows. Because you decide to not deal with the item code 188 in future, you execute the following command to remove the item:
SQL> DELETE FROM items WHERE item_code=188;
What is the effect of this command?

A. The row containing the value 188 corresponding to the ITEM_CODE column is deleted from the ITEMS table, and the dependent rows in the ORDERS table are populated with
NULL values in their ITEM_CODE columns.
B. The row containing the value 188 corresponding to the ITEM_CODE column is deleted from the ITEMS table, and the dependent rows in the ORDERS table are also deleted automatically.
C. The row containing the value 188 corresponding to the ITEM_CODE column is deleted from the ITEMS table, and the foreign key constraint is disabled in the ORDERS table.
D. The command fails with integrity violation error.

Question 4

You perform differential incremental level 1 backups of your database on each working day and level 0 backup on Sundays. Which two statements are true about the differential incremental backups? (Choose two.)

A. The backup performed on Sundays contains all the blocks that have ever been use in the database.
B. The backup performed on each working day contains all the blocks that have changed since the last level 0 backup.
C. The backup performed on each working day contains all the blocks that have changed since the last level 0 or level 1 backup.
D. The backup performed on Sundays contains all the blocks that have changed since the last level 1 backup.

Question 5

You backed up the control file to trace. Which statement is true about the trace file generated?

A. The trace file has a SQL script to re-create the control file.
B. The trace file contains the instructions to manually re-create the control file.
C. The trace file is in binary format.
D. The trace file is an image copy of the control file created during the backup of the control file.
E. The trace file is a backup set created during the backup of the control file.

Solutions: