Which of the following is the correct usage?

1. int a[-40]
2. int a[40]
3. float a[0 - 40]
4. None

Which element is represented by a[10]?

1. 10^th
2. 9^th
3. 11^th
4. None

A dimensional array is also known as:

1. subscripted variable
2. actual variable
3. compound variable
4. none

An array element can be accessed through:

1. dots
2. element name
3. index number
4. none