Question 25 (0.75 points)

Which method from the String class can be used to divide a string into an array of substrings around a given character?

Question 25 options:

	split
	indexOf
	trim
	substring

Question 26 (0.75 points)

You are working on a program that needs the ability to generate random numbers. What should the import statement at the top of the class look like?

Question 26 options:

	import java.rand.Random;
	import java.util.Random;
	import java.Random;
	import java.util.ArrayList;

Question 27 (0.75 points)

A helper method that only needs to be used inside a single class should be designated as _____. Choose the best answer.

Question 27 options:

	final
	private
	static
	public

Question 28 (0.75 points)

Which of the following objects is immutable?

Question 28 options:

	String
	ClockDisplay
	ArrayList
	HashMap

Question 29 (0.75 points)

If we want to convert the String "5" to primitive type int, we could create a java.lang.Integer object and use which method? Choose the best answer.

Question 29 options:

	intValue()
	5
	valueOf()
	toString()

Question 30 (0.75 points)

What keyword is used to declare a constant in Java?

Question 30 options:

	immutable
	final
	const
	constant

Question 31 (0.75 points)

Which statement is not true about the following loop:

for(int val: counts) { // body not shown } 

Question 31 options:

	If counts is empty, the loop body will not execute.
	If counts is an array, it won't compile.
	It is a for-each loop.
	The elements stored in counts are of type int.

Question 32 (0.75 points)

A key difference between arrays and ArrayList is

Question 32 options:

	ArrayList can store more elements than arrays
	Arrays have a fixed size that cannot change, whereas elements can be added and removed from an ArrayList whenever needed
	ArrayList can store more types of elements than arrays
	ArrayList is included automatically, but arrays require importing an additional library