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Q:

________ is a simple object model that is easier to understand and use than OLE DB, and is frequently used for database applications.

A) ASP	B) XML
C) ODBC	D) ADO

Answer & Explanation Answer: D) ADO

Explanation:

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Q:

The ODBC core API consists of which of the following functions?

A) Commit or rollback transactions only	B) Connect to data sources only
C) Connect to data sources with driver-specific information only	D) Both 1 and 2 above are in the OBDC core API.

Answer & Explanation Answer: D) Both 1 and 2 above are in the OBDC core API.

Explanation:

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Q:

An Oracle System Change Number (SCN):

A) is a value that is incremented whenever a dirty read occurs.	B) is incremented whenever a deadlock occurs.
C) is a value that keeps track of explicit locks.	D) is a value that is incremented whenever database changes are made.

Answer & Explanation Answer: D) is a value that is incremented whenever database changes are made.

Explanation:

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Q:

Of the three ways to create an Oracle database, which one is the easiest and most recommended?

A) Using the Oracle Database Configuration Assistant.	B) Using the Oracle-supplied database creation procedures.
C) Using the SQL CREATE DATABASE command.	D) None of the above is correct.

Answer & Explanation Answer: A) Using the Oracle Database Configuration Assistant.

Explanation:

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Q:

What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0?

A) ALTER TABLE STUDENT ALTER CONSTRAINT GradeCheck (Grade > 0);	B) ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck (Grade > 0);
C) ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0);	D) None of the above is correct.

Answer & Explanation Answer: C) ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0);

Explanation:

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Q:

To drop a column that is used as a foreign key, first:

A) drop the primary key.	B) drop the table containing the foreign key..
C) drop the foreign key constraint.	D) All of the above must be done.

Answer & Explanation Answer: C) drop the foreign key constraint.

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Q:

The process of reading a database schema and producing a data model from that schema is known as:

A) data modeling.	B) database design.
C) reverse engineering.	D) None of the above is correct.

Answer & Explanation Answer: C) reverse engineering.

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Q:

In a 1:N relationship, the foreign key is placed in:

A) the parent table.	B) the child table.
C) either table without specifying parent and child tables.	D) either the parent table or the child table.

Answer & Explanation Answer: B) the child table.

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