Turn off, Log off and Shut Down are commands used to switch off the computer.

Correct Option: D

Turn off, Log off and Shut Down are commands used to switch off the computer.

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite. It is a network of networks linked by a broad array of electronic, wireless and optical networking technologies. Cyberspace refers to the global network of interdependent information technology infrastructures, telecommunications networks and computer processing systems in which online communication takes place.

Correct Option: C

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite. It is a network of networks linked by a broad array of electronic, wireless and optical networking technologies. Cyberspace refers to the global network of interdependent information technology infrastructures, telecommunications networks and computer processing systems in which online communication takes place.

The most crucial portion of any computer is the Central Processing Unit (CPU). The CPU is the brain of the computer where most calculations take place.

Correct Option: C

The most crucial portion of any computer is the Central Processing Unit (CPU). The CPU is the brain of the computer where most calculations take place.

In MS Word, multiple words, lines or paragraphs can be selected by using Ctrl+C keys.

Correct Option: D

In MS Word, multiple words, lines or paragraphs can be selected by using Ctrl+C keys.

Read Only Memory (ROM) is a class of storage medium used in computers and other electronic devices. A hard disc drive is a data storage device. ROM is a primary storage medium while all others are secondary storage units.

Correct Option: B

Read Only Memory (ROM) is a class of storage medium used in computers and other electronic devices. A hard disc drive is a data storage device. ROM is a primary storage medium while all others are secondary storage units.