QUESTION 1

Suppose x = 1, y = -1, and z = 1. What is the printout of the following statement? (Please indent the statement correctly first.)

		x > 0 and y > 0;
		x 0;
		x
		no printout.

0.8 points

QUESTION 2

Analyze the following program fragment:

		The program has a compile error because the required break statement is missing in the switch statement.
		The program has a compile error because the required default case is missing in the switch statement.
		The switch control variable cannot be double.
		No errors.

0.8 points

QUESTION 3

Analyze the following code:

		The symbol x is always printed.
		The value of variable x is always printed.
		Nothing is printed because x > 0 is false.
		The symbol x is always printed twice.

0.8 points

QUESTION 4

Suppose x=10 and y=10. What is x after evaluating the expression (y >= 10) || (x-- > 10)?

		9
		10
		11

0.8 points

QUESTION 5

What is 1 0.1 - 0.1 - 0.1 - 0.1 - 0.1 == 0.5?

		true
		false
		There is no guarantee that 1 0.1 - 0.1 - 0.1 - 0.1 - 0.1 == 0.5 is true.

0.8 points

QUESTION 6

Analyze the following code: boolean even = (number % 2 == 0);

		Code 1 has compile errors.
		Code 2 has compile errors.
		Both Code 1 and Code 2 have compile errors.
		Both Code 1 and Code 2 are correct, but Code 2 is better.

0.8 points

QUESTION 7

Suppose income is 4001, what is the output of the following code?

		no output
		Income is greater than 3000
		Income is greater than 3000 followed by Income is greater than 4000
		Income is greater than 4000
		Income is greater than 4000 followed by Income is greater than 3000

0.8 points

QUESTION 8

You can cast a Boolean value to an int, or an int to Boolean.

		true
		false

0.8 points

QUESTION 9

Assume x = 4 and y = 5, which of the following is true?

		!(x == 4) ^ y != 5
		x != 4 ^ y == 5
		x == 5 ^ y == 4
		x != 5 ^ y != 4

0.8 points

QUESTION 10

The not equal comparison operator in Java is ________.

		!=
		!= =
		^=

0.8 points

QUESTION 11

In Java, the word true is ________.

		a Java keyword
		a Boolean literal
		same as value 1
		same as value 0

0.8 points

QUESTION 12

What is y after the following statement is executed? x = 0; y = (x > 0) ? 10 : -10;

		-10
		0
		10
		20
		Illegal expression

0.8 points

QUESTION 13

Assume x is 0. What is the output of the following statement?

		x is greater than 0
		x is less than 0
		x equals 0
		None

0.8 points

QUESTION 14

Analyze the following code:

		y becomes 1 after the code is executed.
		y becomes -1 after the code is executed.

0.8 points

QUESTION 15

Suppose cond1, cond2, and cond3 are Boolean expressions. Which of the following expression is equivalent to cond1 || cond2 && cond3?

		(cond1 || cond2) && cond3
		cond1 || (cond2 && cond3)

0.8 points

QUESTION 16

The "less than or equal to" comparison operator in Java is ________.

		=
		!=

0.8 points

QUESTION 17

What is the output of the following code? (Please indent the statement correctly first.)

		x > 9 and y > 8;
		x = 7;
		x
		none

0.8 points

QUESTION 18

Assume x = 4 and y = 5, which of the following is true?

		x
		x
		x > 5 && y > 5
		x > 5 || y > 5

0.8 points

QUESTION 19

What is 1 + 1 + 1 + 1 + 1 == 5?

		true
		false
		There is no guarantee that 1 + 1 + 1 + 1 + 1 == 5 is true.

0.8 points

QUESTION 20

What is y after the following switch statement is executed?

		1
		2
		3
		4
		0

0.8 points

QUESTION 21

The ________ method immediately terminates the program.

		System.terminate(0);
		System.halt(0);
		System.exit(0);
		System.quit(0);
		System.stop(0);

0.8 points

QUESTION 22

Given |x - 2|

		x - 2 = 4
		x - 2 -4
		x - 2 = -4
		x - 2 = -4

0.8 points

QUESTION 23

Which of the following operators are right-associative?

		*
		+ (binary +)
		%
		&&
		=

0.8 points

QUESTION 24

Analyze the following code:

		The program has a compile error.
		The program has a runtime error.
		The program runs fine, but displays nothing.
		The program runs fine and displays It is even!

0.8 points

QUESTION 25

Which of the following expressions evaluates to true?

		'a' > 'A'
		34 > 34
		'A' > 'z'
		2 > '2'

0.8 points

QUESTION 26

Which of the following code displays the area of a circle if the radius is positive?

		if (radius != 0) System.out.println(radius * radius * 3.14159);
		if (radius >= 0) System.out.println(radius * radius * 3.14159);
		if (radius > 0) System.out.println(radius * radius * 3.14159);
		if (radius

0.8 points

QUESTION 27

Analyze the following code: boolean even = ((231 % 2) == 0); if (even = true) System.out.println("It is even!"); else System.out.println("It is odd!");

		The program has a syntax error
		The program has a runtime error
		The program displays "It is odd!"
		The program displays "It is even!"

0.8 points

QUESTION 28

Which of the following is the correct expression that evaluates to true if the number x is between 1 and 100 or the number is negative?

		1
		((x 1)) || (x
		((x 1)) && (x
		(1 > x > 100) || (x

0.8 points

QUESTION 29

What is y after the following switch statement?

		1
		-1
		0
		2

0.8 points

QUESTION 30

What is y displayed in the following code?

		y is 0.
		y is 1 because x is assigned to y first.
		y is 2 because x + 1 is assigned to x and then x is assigned to y.
		The program has a compile error since x is redeclared in the statement int y = x = x + 1.

0.8 points

QUESTION 31

What is 1.0 + 1.0 + 1.0 == 3.0?

		true
		false
		There is no guarantee that 1.0 + 1.0 + 1.0 == 3.0 is true.

0.8 points

QUESTION 32

The ________ operator can be used to compare two values.

		relational
		boolean
		numerical
		casting

0.8 points

QUESTION 33

The default case must be specified in a switch statement.

		true
		false

0.8 points

QUESTION 34

Suppose isPrime is a boolean variable, which of the following is the correct and best statement for testing if isPrime is true?

		if (isPrime = true)
		if (isPrime == true)
		if (isPrime)
		if (!isPrime = false)
		if (!isPrime == false)

0.8 points

QUESTION 35

Given |x - 2| >= 4, which of the following is true?

		x - 2 >= 4 && x - 2
		x - 2 >= 4 || x - 2
		x - 2 >= 4 && x - 2
		x - 2 >= 4 || x - 2

0.8 points

QUESTION 36

The break keyword must be used in a switch statement; otherwise, a syntax error occurs.

		true
		false

0.8 points

QUESTION 37

In a switch statement, the default case must appear last among all cases. Otherwise, it would result in a compilation error.

		true
		false

0.8 points

QUESTION 38

Suppose x=0 and y=0. What is x after evaluating the expression (y > 0) && (1 > x++)?

		0
		-1
		1

0.8 points

QUESTION 39

What is x after evaluating the following? x = (2 > 3) ? 2 : 3;

		2
		3
		4
		5

0.8 points

QUESTION 40

Suppose you write the code to display "Cannot get a driver's license" if age is less than 16 and "Can get a driver's license" if age is greater than or equal to 16. Which of the following code is the best?

		I
		II
		III
		IV

0.8 points

QUESTION 41

Suppose x=10 and y=10. What is x after evaluating the expression (y > 10) && (x-- > 10)?

		9
		10
		11

0.8 points

QUESTION 42

Which of the following is the correct expression that evaluates to true if the number x is between 1 and 100 or the number is negative?

		1
		((x 1)) || (x
		((x 1)) && (x
		(1 > x > 100) || (x

0.8 points

QUESTION 43

Analyze the following code:

		The if statement is wrong, because it does not have the else clause.
		System.out.println(number); must be placed inside braces.
		If number is zero, number is displayed.
		If number is positive, number is displayed.
		number entered from the input cannot be negative.

0.8 points

QUESTION 44

The exclusive or (^) of true and true is true.

		true
		false

0.8 points

QUESTION 45

Suppose cond1 and cond2 are two Boolean expressions. When will this if condition be true? if (cond1 && cond2) ...

		in case cond1 is true and cond2 is false
		in case cond1 is true and cond2 is true
		in case cond1 is false and cond2 is false
		in case cond1 is false and cond2 is true

0.8 points

QUESTION 46

What is the output from System.out.println((int)Math.random() * 4)?

		0
		1
		2
		3
		4

0.8 points

QUESTION 47

The order of the precedence (from high to low) of the operators binary +, *, &&, ||, & is ________.

		&&, ||, &, *, +
		*, +, &&, ||, &
		*, +, &, &&, ||
		*, +, &, ||, &&
		&, ||, &&, *, +

0.8 points

QUESTION 48

You can always convert a switch statement to an equivalent if statement.

		true
		false

0.8 points

QUESTION 49

Analyze the following code: if (x 10) System.out.println("x is between 10 and 100");

		The statement has compile errors because (x 10) must be enclosed inside parentheses.
		The statement has compile errors because (x 10) must be enclosed inside parentheses and the println() statement must be put inside a block.
		The statement compiles fine.
		The statement compiles fine, but has a runtime error.

0.8 points

QUESTION 50

The following code displays ________.

		too hot
		too cold
		just right
		too hot too cold just right