Explanation

There are two basic types of Computer memory.

1. Primary memory (RAM and ROM) 

2 Secondary memory (hard drive,CD,etc.)

Explanation

Scanner converts hardcopy into softcopy while Printer converts softcopy into hardcopy. 

Explanation

There are five basic types of computer operations: Inputting, processing, outputting, storing, and controlling.

Explanation

Refresh is used to update content of a webpage.

F5 is the shortcut key for Refresh. 

Explanation

The hard disk is a secondary storage device, which is designed to store data permanently.

Explanation

Paper setting allows us to check the type of paper and type of toner to use while printing other settings.

Print Preview shows us what our print would physically look like on the paper.

Explanation

1.       Modeless

2.       Modal

3.       System modal

Explanation

Hyphen (-)

Ctrl + P is used to print a document

By default, our documents are printed in portrait-oriented mode.

Explanation

Firewall also prevents unauthorized access.

Explanation

 A real-time operating system  is an operating system  intended to serve real-time applications that process data as it comes in, typically without buffer delays.