Maximum number of columns that can be inserted in a word document:

The facility used to cancel the last action is:

The first page that you normally view at a website is known as :

Which of the following refers to dangerous programs that can be ‘caught’ by opening e-mail attachments and downloading software from the internet ?

……….is having more memory addresses than are physically available.

Which of the following refers to restarting the system when it is already powered on ?