Why do computers use binary devices internally? (Note: the question asks about binary devices, not binary numbers.)

Question 15 options:

1)	Binary devices are significantly smaller than those with multiple states.
2)	Binary devices are significantly faster than those with multiple states.
3)	Binary devices are significantly more reliable than those with multiple states.
4)	Electronic devices are inherently binary in nature.

The unit that performs the arithmetic and logical operations on the stored numbers is known as

Question 16 options:

1)	the arithmetic logic unit
2)	the control unit
3)	the memory unit
4)	the calculator unit d. the calculator unit

The main purpose of a computer's operating system is

Question 17 options:

1)	to provide for a graphical user interface.
2)	to manage the file system and disk storage.
3)	to provide an interface between user or application program and the hardware.
4)	to provide security for the computer system.

The main memory, often known as primary storage, working storage, or RAM (for random access memory), holds

Question 18 options:

1)	data.
2)	program instructions.
3)	both data and program instructions.
4)	data, program instructions, and instructions for booting the computer.