Which data communication method is used to send data in both directions at the same time?

Which output device transfers processed information into a printed page?  

Which of the following function key activates the speller?

is a form of permanent memory that holds all the instructions the computer needs to start up and does not get erased when the power is turned off. 

Compiler in computer system is a : 

Virus usually comes from the floppy disk left in the floppy disk drive.

Which of the following pair is Incorrect?

A hacker that changes or forges information in an electronic resource, is engaging in _________ .