CH 2 - Java Fundamentals

Which of the following is not a valid Java comment?

• /** Comment 1 */

• */ Comment 2 /*

• // Comment 3

• /* Comment 4 */

When saving a Java source file, save it with an extension of

• .java.

• .javac.

• .src.

• .class.

This is a value that is written into the code of a program.

• Literal

• Assignment statement

• Operator

• Variable

Which of the following is not a rule that must be followed when naming identifiers?

• After the first character, you may use the letters a-z, A-Z, an underscore, a dollar sign, or digits 0-9.

• Identifiers can contain spaces.

• Uppercase and lowercase characters are distinct.

• The first character must be one of the letters a-z, A-Z, an underscore or a dollar sign.

Character literals are enclosed in ________, and string literals are enclosed in ________.

• single quotes, double quotes

• double quotes, single quotes

• single quotes, single quotes

• double quotes, double quotes

What is the result of the following expression?

17 % 3 * 2 - 12 + 15

• 105

• 12

• 7

• 8

What will be the value of z after the following statements have been executed?

int x = 4, y = 33;

double z;

z = (double) (y / x);

• 8.25

• 4

• 0

• 8.0

What is the result of the following expression?

10 + 5 * 3 — 20

• -5

• -50

• 5

• 25

Variables are classified according to their

• names.

• values.

• location in memory.

• data type.

Which of the following statements will correctly convert the data type, if x is a float and y is a double?

• x = float y;

• x = <float>y;

• x = (float)y;

• x = y;