In the Java API page for the floor method, it lists the signature as

public static double floor(double a)

Given this information, which of the following statements will compile and run without errors (assuming they're inside an otherwise valid program)?

	Math.floor(8.9) = double x;
	int x = Math.floor(8.9);
	double x = floor(8.9);
	double x = Math.floor(8.9);

What happens when we write this code snippet? int x = 1; int x = x + 1; x = x + 1; System.out.println(x);

Question 2 options:

	It has a compile error because on the third line the type of x is not specified
	It compiles, but has a runtime error when printing x because x has multiple values during the program
	It compiles and runs correctly, and prints 3
	It has a compile error because x cannot be declared twice

Which of the following code snippets compiles and correctly prints the square root of 2?

Question 3 options:

	Math m = new Math(); System.out.println(m.sqrt(2));
	Math.print(sqrt(2));
	System.out.println(Math.sqrt(2));
	System.out.println(sqrt(2));

Question 4 (1 point)

Which of the following could NOT possibly be the output of this code snippet? Random rg = new Random(); int x = rg.nextInt(7); System.out.println(x);

Question 4 options:

	1
	6
	0
	7

Question 5 (1 point)

Which of the following is NOT an example of an expression?

Question 5 options:

	7
	kb.nextInt()
	"Hello world!"
	String name;

Question 6 (1 point)

What output would be produced by this code snippet? System.out.print(8); System.out.println("cats"); System.out.print(7);

Question 6 options:

	8.0cats 7.0
	8cats7
	8cats 7
	8 cats 7

Question 7 (1 point)

Assuming x has been declared as an int, what does the following line of code do?

x = 7;

Question 7 options:

	It assigns the value 7 to the memory allocated for the variable x.
	This line of code has an error and does not compile.
	This line of code is legal but has no effect.
	It checks if the value stored in the memory for x is equal to 7.

Question 8 (1 point)

What is output by this code snippet? String s = "Hi friend!"; s.replace('i','A'); System.out.println(s);

Question 8 options:

	HA frAend!
	HA
	HA friend!
	Hi friend!

Question 9 (1 point)

What is the output of this code snippet? int x = 5; System.out.println(x / 2);

Question 9 options:

	5
	2
	None, there is a compile error
	2.5

Question 10 (1 point)

The syntax of a language is best described as:

Question 10 options:

	The rules for how the symbols can be arranged
	The font and color the language should be written in
	The meaning of the language's symbols in particular arrangements
	The development environment where a language can be written

Question 11 (1 point)

While there are many valid definitions for computer science, in class we said computer science is:

Question 11 options:

	the process of writing programs, and only if they're in Java
	the study of what can be computed
	the study of telescopes
	the study of computers

Question 12 (1 point)

In Java, the outermost block of code must be:

Question 12 options:

	A class
	A main method
	A comment
	A declaration statement

Question 13 (1 point)

When we write a main method for our Java programs, its signature (also called its declaration or "header") must be:

Question 13 options:

	public class main(String args)
	static void main()
	private int main(String[] args)
	public static void main(String[] args)

Question 14 (1 point)

Suppose we want to get an int value that is typed by the user with the line int value = kb.nextInt(); Which of these lines must appear somewhere before that line in our code?

Question 14 options:

	Scanner kb = new Random();
	Keyboard kb = new Keyboard();
	Scanner kb = new Scanner(System.in);
	new Scanner kb;

Question 15 (1 point)

The semantics of a language is best described as:

Question 15 options:

	The development environment where a language can be written
	The meaning of the language's symbols in particular arrangements
	The font and color the language should be written in
	The rules for how the symbols can be arranged