CENTRAL SCHOOL LIBRARY Observe the ER Diagram for the CENTRAL SCHOOL LIBRARY

question 51

Multiple Choice

CENTRAL SCHOOL LIBRARY
Observe the ER diagram for the CENTRAL SCHOOL LIBRARY

-How many foreign keys will the relational schema mapped from the Central School Library ER diagram have?

• A)0
• B)1
• C)2

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Definitions:

Molecule

The smallest unit of a chemical compound that can exist, consisting of two or more atoms bonded together.

Hemoglobin

A protein in red blood cells responsible for transporting oxygen from the lungs to the rest of the body.

Mutation

A change in the DNA sequence within an organism's gene or chromosome, leading to diversity within species and populations.

Gene

A segment of DNA that serves as a unit of hereditary information; includes a transcribable DNA sequence (plus associated sequences regulating its transcription) that yields a protein or RNA product with a specific function.