Exam 2: Using Data

Define an integer and then list and describe the four integer data data types.

char aCharacter = 2; int aNumber = '2'; In the above statements, what values will be output after a println() statement is executed? Why are the output results different for the two statements?

How can you create and use an input dialog box in Java?

Describe how the use of named constants can provide advantages over the use of literal values.

What is the value of result after the following statement is executed? int result = 2 + 3 * 4;

Each primitive type in Java has a corresponding class contained in the java.lang package. These classes are called ____ classes.

A variable declaration is a statement that reserves a named memory location. It includes what four elements?

final int COSTPERITEM = 10; double sales2012 = amtSold * COSTPERITEM; In the above statements, identify the named constant and describe how a programmer can recognize named constants.

In Java, how is it possible to perform mathematical operations on operands with unlike types?

What is the difference between the float data type and the double data type?

You are limited to declaring a maximum of three variables in a single statement.

Once a variable has been declared and initialized, new values may not be assigned to the variable.

____________________ forces a value of one data type to be used as a value of another type.

Write the statement that will declare a char data type named testScore that will hold a letter grade of your choice.

The ____ is the type to which all operands in an expression are converted so that they are compatible with each other.

Why is the following relational operator expression invalid? How could you rewrite the statement so that it is valid? boolean isGradePassing = (grade => 70);

The percent sign is the ____ operator.

A(n) ____ dialog box asks a question and provides a text field in which the user can enter a response.

Describe three ways in which a named constant differs from a variable.

A(n) ____________________ operator compares two items and the result has a Boolean value.