AP Computer Science A - Quiz 1 Variables and Data Types

What is the correct way to declare a string variable in Java?

• string var = "This is a string";

• string var = 'This is a string';

• String var = 'This is a string';

• String var = "This is a string";

Which of the following is a correct declaration of an integer variable?

• int num1 = 10.5;

• int num1 = 10;

• boolean num1 = 10;

• double num1 = 10;

How do you declare a double variable with a value of 11?

• double num1 = 11;

• double num1 = 11.0;

• int num1 = 11.0;

• boolean num1 = 11.0;

What does the 'final' keyword do when declaring a variable?

• It allows the variable to be changed later.

• It makes the variable accessible only within the class.

• It makes the variable a global variable.

• It prevents the variable from being reassigned.

Which of the following is a valid boolean declaration?

• boolean isTrue = 'true';

• boolean isTrue = TRUE;

• boolean isTrue = True;

• boolean isTrue = true;