Examine these commands and output: Which is true?

It returns an error because the DROP TABLE statement did not drop the view.

Existing emp_vuL is dropped and a new emp_vu1 created with the new definition.

A new view is created because the previous was dropped on execution of the drop table statement.

It returns an error because the CREATE TABLE statement automatically recreated the view.

Which two statements are true about AUTO_INCREMENT?

AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.

An AUTO_INCREMENT column must be indexed.

A table can have multiple AUTO_INCREMENT columns.

A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.

The decimal data type supports AUTO_INCREMENT.

How does InnoDB choose deadlock victims in MySQL?

It chooses the transaction randomly.

It chooses the transaction with the lowest transaction ID.

It chooses the transaction with the least accumulated CPU time.

It chooses the transaction with the most accumulated CPU time.

It chooses the transaction with the most modified rows.

It chooses the transaction with the fewest modified rows.

Examine the appointments table definition which contains one million rows: Now, examine this statement which executes successfully: Which statement will improve query performance?

ALTER TABLE appointments add index IX_4

ALTER TABLE appointments add index IX_1(credit,payment)

ALTER TABLE appointments add index IX_2(attendant_session_id, created_by)

ALTER TABLE appointments add index IX_3(attendant_id, created_by)

Free Oracle 1Z0-909 Exam Practice Questions & Explanations

Last updated on: Oct 20, 2026
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