1. Which one is not an output device?   A Printer.   B Monitor.   C Keyboard.   D Modem. 2. Which one works as an output and input device?    A Modem.    B Scanner.    C Mouse.    D Monitor. 3. All computers must have:.   A Word processing software.   B An operating system.   C A printer attached.   D A virus checking program. 4. The brain of the computer is called:.    A Random Access Memory or RAM.    B Central Processing Unit or CPU.    C Read Only Memory or ROM.    D BIOS. 5. An operating system is:.     A Integrated software.     B CD-ROM software.     C Application software.     D System software. 6. Software is:.     A A computer program.     B A set of instructions.     C All of the above.      D Only in operating systems. 7. One MB is equal to:.      The amount of RAM in every computer.      1 billion bytes.      1024KB.      1 thousand bytes. 8. The resolution of a monitor is measured in:.     Megabits.     Hz.    Dots per inch (DPI).    Inches (diagonal). 9. Windows and Macintosh computers:.    Are both manufactured by Motorola.    Both use Intel microprocessors.    Use the same operating system.    Are not compatible. 10. A computer port is used to:.      Communicate with other computer peripherals.      Download files from the web.