Question 1

Assume that SimpleInput is a class whose JavaDoc contains information about the following method:

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public static double readDouble()

This method will display a graphical input box and prompt the user for a valid numeric value, which is returned.

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Which of the following code segments correctly invokes readDouble from a main method that is not part of the SimpleInput class?

Accepted Answer

SimpleInput.readDouble();

Answer

readDouble(SimpleInput);

Answer

input.readDouble(); // where input is an instance of SimpleInput

Question 2

Which of the following are true about a datatype?  (Check all that dont apply)

Accepted Answer

The 8 primitive types are the only datatypes provided by Java.

Answer

A datatype defines the set of allowable values that can be stored.

Answer

To avoid compiler errors, values of a type must only be used in ways that are defined by the datatype.

Answer

Classes in Java are datatypes.

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Questions in this quiz (2)