Correct Answer : A
The most commonly used integer type is int. It is a signed 32-bit (4 bytes) type that has a range from -2,147,483,648 to 2,147,483,647. In addition to other uses, variables of type int are commonly employed to control loops and to index arrays. Any time you have an integer expression involving bytes, shorts, ints, and literal numbers, the entire expression is promoted to int before the calculation is done.
The int type is the most versatile and efficient type and it should be used most of the time when you want to create a number for counting or indexing arrays or doing integer math. It may seem that using short or byte will save space, but there is no guarantee that Java won't promote those types to int internally anyway. Remember, type determines behavior, not size. (The only exception is arrays, where byte is guaranteed to use only one byte per array element, short will use two bytes, and int will use four.)
Who invented conceived Java
