IT &computer MCQ section 6 MCQ Questions & Answers Detailed Explanation

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.

Answer: (b)

URL is an acronym for Uniform Resource Locator. Commonly referred to as a web address, URL is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it.

Answer: (b)

UNIX is a popular multi-user, multitasking operating system developed at Bell Labs in the early 1970s. Created by just a handful of programmers, UNIX was designed to be a small, flexible system used exclusively by programmers. It was designed to be portable, multi-tasking and multi-user in a timesharing configuration.

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: (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: (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.