Question

Composition means ________. a)that data fields should be declared private b)that a class extends another class c)that a variable of supertype refers to a subtype object d)that a class contains a data field e)that references another object

Answer 1

Answer:

The answer is "Option d".

Explanation:

In programming, Composition is a method, which is used to applying multiplicating and additive probability laws to evaluate the probabilities, It is a unique method, that uses math function, it also use to include data field, and other choices are wrong, that can be described as follows:

• In option a, It uses an access modifier, that's why it is wrong.

• In option b, This process is called inheritance, that's why it is wrong.

• In option c, It uses in part of typecasting, that's why it is wrong.

• In option e, It is incorrect because it refers to another object.