APCS A - Array 6.1,6.2,6.3,6.

Which of the following is true about arrays in Java? They are fixed in size, They are dynamic, They can grow automatically, You can add/remove elements, No index-based access

• They are fixed in size

• They are dynamic

• They can grow automatically

• You can add/remove elements

What is the default value of an int array element in Java?

• -1

• 0

• null

• undefined

Can you store null in an object array?

• Yes

• No

• Only in certain programming languages

• Only if the array is initialized

How are arrays stored in memory in Java?

• Stack

• Heap

• Register

• Cache

Which exception is thrown for accessing an array index out of bounds?

• IndexOutOfRangeException

• OutOfMemoryError

• ArrayIndexOutOfBoundsException

• IllegalArgumentException

How do you loop through an array?

• for (int i : arr)

• for (i = 0; i < arr.length; i++)

• foreach (int i in arr)

• for (int i = 0; i < arr.size(); i++)

How do you reverse an array in Java?

• Using the reverse() method

• Custom code or loop

• Using the sort() method

• Using the shuffle() method

What is the correct way to declare an array in Java?

• int arr[] = new int[5];

• int arr() = new int[5];

• int arr = new int[5];

• array int arr = new int[5];

Which of the following is NOT valid? Options: int[] arr = new int[5]; double[] arr = new double[10]; boolean arr[] = new boolean[3]; String arr = new String[4]; char arr[] = new char[2];

• int[] arr = new int[5];

• double[] arr = new double[10];

• String arr = new String[4];

• boolean arr[] = new boolean[3];

What is the output of: int[] arr = new int[3]; System.out.print(arr[0]);?

• 0

• 1

• null

• undefined