Variables, Constants, and Data Types

Which of the following statements about variable is not true?

• A variable is a location in the memory of a computer.

• A variable must have a specific and unique name.

• Each variable has its own data type.

• A variable is always initialized as soon as it is declared.

The value of a constant remain fixed in the program code but can be altered when the program is running.

• True

• False

Which of the following is not an integral numeric data type?

• Integer

• Long

• Short

• Decimal

If a variable can contain a fraction, which of the following data types can you use?

• Single

• Long

• Short

• Byte

What numeric data type ranges from -2,147,483,648 through 2,147,483,647?

• Integer

• Long

• Double

• Decimal

Which numeric data type ranges from -32,768 through 32,767?

• Short

• Single

• Byte

• Long

A Byte is a small integer data type that ranges from __________.

• 0 to 255

• 0 to 32,767

• -256 to 255

• -255 to 256

Short data type can save memory consumption, but operations with Integer are faster than with Short.

• True

• False

A Decimal data type is always a floating point value with up to 28 decimals to the right and cannot be an Integer.

• True

• False

Which of the following data types does not have a fractional part?

• Single

• Double

• Decimal

• Short