Arrays en Java

What is an array in Java?

• An array in Java is a data structure that allows you to store multiple values of different types in a single variable.

• An array in Java is a data structure that allows you to store multiple values of the same type in a single variable.

• An array in Java is a keyword used to declare a variable.

• An array in Java is a method used to perform mathematical calculations.

How do you declare an array in Java?

• arrayName[] = new int[];

• int arrayName[];

• int[] arrayName = new int[];

• int[] arrayName;

How do you initialize an array in Java?

• int[] myArray = new int[5];

• int[] myArray = new int[];

• int[] myArray = new int[0];

• int[] myArray = new int();

How do you access an element in an array in Java?

• arrayName[index]

• arrayName(index)

• arrayName{index}

• arrayName.index

How do you modify an element in an array in Java?

• Access the element using its index and assign a new value to it.

• Use the 'replace' method to directly modify the element in the array.

• Create a new array with the modified element and replace the original array with the new one.

• Use the 'remove' method to delete the element and then add a new element with the modified value.

What is the index of the first element in an array in Java?

• 0

• null

• -1

• 1

What is the index of the last element in an array in Java?

• length - 1

• length

• length - 2

• length + 1

Can the size of an array be changed once it is declared in Java?

• Only if it is empty

• Yes

• Sometimes

• No

What happens if you try to access an element outside the bounds of an array in Java?

• IndexOutOfBoundsException

• ArrayIndexOutOfBoundsException

• ArrayOutOfBoundsException

• NullPointerException

How do you find the length of an array in Java?

• arr.length

• arr.count()

• arr.length()

• arr.size()