What code will set the last element of array b to 9?

Question 1 options:

	b[ b.length-1 ] = 9;
	b[-1] = 9;
	b[ b.length ] = 9;
	b = 9;

Question 2 (1 point)

If you create an array of ints, what value will the elements of the array have initially?

Your Answer:Question 2 options:

Answer

Question 3 (1 point)

Which code below properly declares an array of String with 8 elements?

Question 3 options:

	new String[] = String[8];
	String[] s = new String[8];
	String[] s = 8;
	String s[8];

Question 4 (1 point)

In the code below, what is the value of a[1]?

 int[] a = new int[3]; int[] b = a; b[1] = 3; a[1] += 2; 

Your Answer:Question 4 options:

Answer

Question 5 (1 point)

Suppose b is an array of String. What does this code do? String[] c = b;

Question 5 options:

	c points to the same array as b.
	c becomes a copy of b.
	It is an error, since c and b do not have the same name.
	c and b have the same size, but the values in c are all null.

Question 6 (1 point)

What does the following code do? int[] b = new int[5]; int[] c = b; c[1] = 3;

Question 6 options:

	b and c are arrays that both have the value 5 in them.
	b and c point to different arrays. c[1] is 3, and b[1] is 0.
	b and c point to the same array, and element 1 of that array is 3.
	b and c point to the same array, and all the elements of both are 3.

Question 7 (1 point)

Suppose you want to print an grid of numbers using the code below: for (int r=0; r<5; r++) { for (int c=0; c<4; c++) { System.out.print((r+c) + " "); } System.out.println(); }

How many rows will the grid have?

Your Answer:Question 7 options:

Answer

Question 8 (1 point)

What is a code block enclosed in?

Question 8 options:

	Curly braces
	Quotes
	Brackets
	Parentheses

Question 9 (1 point)

Suppose you want to print an n x n grid of x's. What code would you place at "// your code here"? for (int r=0; r

Question 9 options:

	System.out.println("x");
	System.out.print(c);
	if (r==c) System.out.print("x");
	System.out.print("x");

Question 10 (1 point)

The increment part of a for loop is the first thing in the loop that executes.

Question 10 options:

	True
	False

Question 11 (1 point)

If a continue statement happens in a for loop, the increment part of the loop will still execute for that iteration.

Question 11 options:

	True
	False

Question 12 (1 point)

Java reserves certain words for special purposes. Which of the following is not a reserved word?

Question 12 options:

	elseif
	if
	class
	public

Question 13 (1 point)

+ has higher precedence than %

Question 13 options:

	True
	False

Question 14 (1 point)

Which line of code will set the String s to the value "happy"?

Question 14 options:

	s <- "happy";
	set s to "happy";
	"happy" = s;
	s = "happy";

Question 15 (1 point)

Which of the following will print the String "hello"?

Question 15 options:

	system.out.println(hello);
	echo "hello";
	System.Out.Println("hello");
	System.out.println("hello");