IT &computer MCQ section 2 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (a)

Value-added telecommunication services are telecommunications for which suppliers “add value” to the customer’s information by enhancing its form or content or by providing for its storage and retrieval.

FAX is not considered to be a Value-added telecommunication service.

Answer: (b)

A parallel port can be used to connect a large number of devices. The most common usage was for printers, although scanners, external disk drives, and network adapters also used this port. With a special cable, two computers could also be connected directly for sharing files.

Answer: (a)

2G (or 2-G) is short for second-generation wireless telephone technology.

Three primary benefits of 2G networks over their predecessors were that phone conversations were digitally encrypted; 2G systems were significantly more efficient on the spectrum allowing for far greater mobile phone penetration levels; and 2G introduced data services for mobile, starting with SMS text messages.

Answer: (c)

A Network Interface Card (NIC) is a device that allows computers to be joined together in a network, typically a Local Area Network (LAN).

The network interface card acts as an interpreter, allowing the machine to both send and receive data on a LAN. Information Technology (IT) specialists often use these cards to set up wired or wireless networks.

Answer: (c)

Dynamic Random Access Memory (DRAM), the most common kind of Random Access Memory (RAM) for Personal computers and workstations, has to be refreshed many times per second in order to hold its data contents.

DRAM is dynamic in that, unlike static RAM (SRAM), it needs to have its storage cells refreshed or given a new electronic charge every few milliseconds. DRAM stores each bit in a storage cell consisting of a capacitor and a transistor.

Capacitors tend to lose their charge rather quickly thus, the need for recharging.