OCA Arrays

What happens when calling the following method with a non-null and non-empty

array?

• It adds an element to the array the value of which is Times Square.

• It replaces the last element in the array with the value Times Square.

• It does not compile.

• It throws an exception.

How many lines does the following code output?

• Six

• Seven

• The code does not compile.

• The code compiles but throws an exception at runtime.

How many dimensions does the array reference moreBools allow?

boolean[][][] bools, moreBools;

• One dimension

• Two dimensions

• Three dimensions

• None of the above

What is a possible output of the following code?

String[] strings = new String[2];

System.out.println(strings);

• [null, null]

• [,]

• [Ljava.lang.String;@74a14482

• None of the above

What is the result of running the code as java Copier?

• 0

• 0 followed by an exception

• 1 followed by an exception

• The code does not compile.

What is the result of running the following program?

• X

• The code does not compile.

• The code compiles but throws a NullPointerException at runtime.

• The code compiles but throws a different exception at runtime.

What does the following output?

• -1

• -2

• -3

• The output is not defined.

What is the output of the following when run as java FirstName Wolfie?

• FirstName

• Wolfie

• The code throws an ArrayIndexOutOfBoundsException.

• The code throws a NullPointerException.

What is the output of the following when run as java Count 1 2?

• 0

• 1

• 2

• The code does not compile.

Which of these four array declarations produces a different array than the others?

• int[][] nums = new int[2][1];

• int[] nums[] = new int[2][1];

• int[] nums[] = new int[][] { { 0 }, { 0 } };

• int[] nums[] = new int[][] { { 0, 0 } };