IT &computer MCQ section 6 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (c)

Optical fibres are used instead of metal wires because signals travel along with them with less loss and are also immune to electromagnetic interference.

Besides, there are no radiated magnetic fields around optical fibres; the electromagnetic fields are confined within the fibre.

Since fibre optics do not radiate electromagnetic energy, emissions cannot be intercepted.

Answer: (d)

V.A. Shiva Ayyadurai, an Indian-born American scientist and entrepreneur, developed a computer program in 1978, which replicated the features of the interoffice, inter-organizational paper mail system. He named his program “EMAIL”.

It was the world’s first full-scale electronic emulation of mail system consisting of:

1. Inbox,
2. Outbox,
3. Folders,
4. the Memo, and
5. Attachments, etc.

The US Copyright Office issued a Certificate of Registration to him on the program in 1982.

Answer: (d)

Bluetooth is a wireless technology standard for exchanging data over short distances, creating personal area networks (PANs) with high levels of security. It can connect several devices, overcoming problems of synchronization.

Answer: (b)

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is an electronic circuit on one small plate ("chip") of semiconductor material, normally silicon. Such a circuit can be made very compact, having up to several billion transistors and other electronic components.

Answer: (c)

A metropolitan area network (MAN) is a computer network that usually spans a city or a large campus. A MAN usually interconnects a number of local area networks (LANs) using a high-capacity backbone technology, such as fiber-optical links, and provides uplink services to wide area networks (or WAN) and the Internet.