For estimating poverty line in India, periodical sample

Which are the input devices that enable direct data entry into a computer system from source documents? 

________Function key refreshes the current window.

Which type of printer uses heat to transfer ink onto paper?

Which of the following is not an input device ?

In a computer system, _________ is a group of servers and other resources that act like a single system and enable high availability

The portion of the operating system that resides in memory is known as:

Which of the following storage media provides sequential access only ?

A key-board has at least:

The bubbles in a bubble memory pack are created with the help of

 The key F12 opens a ___________________