This is the central processing unit of a computer and it controls each and every operation performed by a computer.

This is the right option. Ctrl + K key combination is used to insert a link in Microsoft Word.

It is an operating system and not a hardware device. Hence, this is the correct alternative.

This is an input device.

This file extension is used for batch files, which are used to execute a group of executable files one after another.

Java is an object oriented programming language.

This is an operating system and not an application software.

WAN stands for Wide Area Network. This is the correct answer.

This is the right answer. There are in all 15 action items in powerpoint.

This is the correct answer. There can be a multiple number of viruses in a computer.

Option (1) is the correct answer.

This is the correct answer. There is no component as internal unit in computer terminology. 

This is the correct alternative.

It is the name of a famous virus that was spread in 2001.

Processing is the computer term used for converting data into information.