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Answer:
The correct point about defensive programming is that the "program code frequently assumes that input will be valid and that algorithms will behave as expected".
Explanation:
Answer:
1. A. True
2. A. True
3. B. Conceptual.
4. Three (3).
Explanation:
An Entity-Relationship Model is used in databases to describe the structure and relationship between data elements known as entities.
1. True: In the Entity-Relationship Model, relationships can have attributes.
2. True: Attributes are the smallest division of data in ER diagram.
3. Conceptual: the level of abstraction which the Entity-Relationship Model most concerned with.
4. Consider the following relationship involving two entities, students and classes: A student can take many classes. A class can be taken by many students. The number of tables which can be used to represent this relationship in a schema is 3 because we are having three (3) parameters which are simply the students and the two entities.
In database management, the term "schema" is used to denote a representation of data.
A database schema is a structure which is typically used to represent the logical design of the database and as such represents how data are stored or organized and the relationships existing in a database management system. There are two (2) main categories of a database schema; physical database schema and logical database schema.
