................. allows individual row operation to be performed on a given result set or on the generated by a selected by a selected statement.

An abstract class is which of the following?

• [A] A class that has direct instances, but whose descendants may have direct instances.
• [B] A class that has no direct instances, but whose descendants may have direct instances.
• [C] A class that has direct instances, but whose descendants may not have direct instances.
• [D] A class that has no direct instances, but whose descendants may not have direct instances

..............defines the structure of a relation which consists of a fixed set of attribute-domain pairs.

• [A] Schema
• [B] Program
• [C] Instance
• [D] none

To select all column from the table the syntax is:

• [A] select all from table_name
• [B] select * from table_name
• [C] select from table_name
• [D] none

Which of the following is true concerning Web services standards?

• [A] Led by only one group.
• [B] Helped by cooperation between companies.
• [C] Not necessary at this time.
• [D] Important so that the web can flourish.

The EXISTS keyword will be true if:

• [A] any row in the subquery meets the condition only.
• [B] all rows in the subquery fail the condition only.
• [C] both of these two conditions are met.
• [D] neither of these two conditions is met.