AP CSA Primitive Types Practice

What is a variable in programming?

• A variable is a named storage location that holds a value.

• A variable is a function in programming.

• A variable is a type of loop in programming.

• A variable is a mathematical equation.

Which of the following options are primitive data types in Java?

• integer, boolean, double, String

• integer, boolean, double

• integer, boolean, double, String, Scanner

• integer, boolean, double, String, Object

What is the syntax for declaring a variable in Java?

• var myVar;

• myVariable = int;

• int myVariable;

• declare myVariable;

What is the difference between int and double data types?

• int is used for storing characters while double is used for storing strings.

• int is used for whole numbers while double is used for decimal numbers.

• int is used for decimal numbers while double is used for whole numbers.

• int is used for positive numbers while double is used for negative numbers.

What is the purpose of a variable?

• To store and manipulate data in a program.

• To execute functions in a program.

• To display data in a program.

• To control the flow of a program.

Consider the following code segment.

System.out.println("W");

System.out.println("X");

System.out.print("Y");

System.out.print("Z");

What is printed as a result of executing the code segment?

• WXYZ

• W

  XYZ

• WX

  YZ

• W

  X

  YZ

• W

  X

  Y

  Z

Consider the following code segment.

int x = 10;

int y = 20;

/* missing code */

System.out.print(top / bottom);

Which of the following replacements for /* missing code */ will cause an ArithmeticException to occur?

I. int top = x - y;int bottom = y - x;

II.int top = 2 * x;int bottom = y - top;

III. int top = x + y;int bottom = 2 * top;

• I. only

• II. only

• III. only

• I. and II.

• II. and III.

Consider the following code segment.

String str = "AP";

str += "CS " + 1 + 2;

System.out.println(str);

What is printed as a result of executing the code segment?

• CS AP12

• AP CS3

• CSAP 12

• APCS 12

• APCS 3

If x = 4, x++ =?

• 16

• 8

• 5

• 3

In integer division, what happens to the decimal, such as int a = 25/10, where the answer would be 2.5?

• the decimal is dropped

• the number is rouneded

• the program gives you an error

• only the decimal is returned