What is the principal role of the primary key in a

 In a multi-user operating system, what does it allow multiple users to do simultaneously?

One should click ___________ , in order to move from one worksheet to another in MS-Excel workbook. 

_________ computers exhibits the features of both analog and digital computers.

In which of the following network topology, all devices on a network are connected to a single continuous cable?

Which of the following is not a Computer language ?

Which one of the following is an example of an input AND output device?

Errors in computer programmes are called :

What is the key characteristic of a real-time operating system?

The OSI model's Presentation Layer is responsible for:

One should click ___________ in order to move from one worksheet to another in MS-Excel workbook.