Rosalind Wants to Add Attribute Declarations to Her DTD, and She

question 55

Multiple Choice

Rosalind wants to add attribute declarations to her DTD, and she turns to you for information about the possible attribute types.
-Finally, you help Rosalind write the declaration of an attribute named "credits" of an element named "course." This optional attribute should contain character data, and a value of 4 should be used if an attribute value is not specified.Which of the following is an appropriate declaration of this attribute?

• A) <!ATTLIST credits course CDATA default="4">
• B) <!ATTLIST course credits CDATA default="4">
• C) <!ATTLIST credits course CDATA "4">
• D) <!ATTLIST course credits CDATA "4">

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Definitions:

Independent Variable

A variable in an experiment that is manipulated to observe its effects on a dependent variable.

Internal Validity

The extent to which a study provides evidence that a causal relationship exists between the variables it examines, free from confounding factors.

Random Assignment

Use of a random "chance" procedure (such as a random number generator or coin toss) to determine the condition in which an individual will participate.

Confounding Variable

A factor other than the independent variable that might produce an effect in an experiment, leading to inaccurate results if not controlled.