Free Access Oracle.1z0-071.v2025-03-22.q314 Practice Test (Page 6)

Question 21

You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference.
Which method or feature should you use?

A.Taking a new snapshot and comparing it with a preserved snapshot.

B.Active Session History (ASH) report.

C.Compare Period ADDM report.

D.AWR Compare Period report.

Question 22

View the Exhibit and examine the structure of ORDERSand ORDER_ITEMStables.
ORDER_IDis the primary key in the ORDERStable. It is also the foreign key in the ORDER_ITEMStable wherein it is created with the ON DELETE CASCADEoption.
Which DELETEstatement would execute successfully?

A.DELETE
FROM orders
WHERE (SELECT order_id
FROM order_items);

B.DELETE orders
WHERE order_total < 1000;

C.DELETE orders o, order_items I
WHERE o.order_id = i.order_id;

D.DELETE order_id
FROM orders
WHERE order_total < 1000;

Question 23

Which two statements are true about INTERVAL data types?

A.INTERVAL YEAR TO MONTH columns only support monthly intervals within a range of years.

B.INTERVAL YEAR TO MONTH columns only support monthly intervals within a single year.

C.The value in an INTERVAL DAY TO SECOND column can be copied into an INTERVAL YEAR TO MONTH column.

D.The YEAR field in an INTERVAL YEAR TO MONTH column must be a positive value.

E.INTERVAL DAY TO SECOND columns support fractions of seconds.

F.INTERVAL YEAR TO MONTH columns support yearly intervals.

Question 24

Examine this query:
SELECT 2 FROM dual d1 CROSS JOIN dual d2 CROSS JOIN dual d3;
What is returned upon execution?

A.0 rows

B.an error

C.8 rows

D.6 rows

E.1 row

F.3 rows

Question 25

Which two are true about the MERGE statement?

A.The WHEN MATCHED clause can be used to specify the updates to be performed.

B.The WHEN NOT MATCHED clause can be used to specify the deletions to be performed.

C.The WHEN NOT MATCHED clause can be used to specify the inserts to be performed.

D.The WHEN NOT MATCHED clause can be used to specify the updates to be performed.

E.The WHEN MATCHED clause can be used to specify the inserts to be performed.

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