Telecommunications | MCQs

Explanation

CDMA is a wireless communication technology that allows multiple signals to occupy a single transmission channel using unique codes.

It improves efficiency and security in mobile networks.

Explanation

County codes were introduced in 1960 by the International Telecon Union.

PK is the national code of Pakistan.

+92 is the dialling code of Pakistan. 

Explanation

iPhone: is a specific model of smartphone produced by Apple, making it a recognized brand for smartphones. 

The first-generation iPhone was announced by then–Apple CEO and co-founder Steve Jobs on January 9, 2007, 

Explanation

Fiber optics uses light to transmit data at high speeds through thin glass or plastic fibers.

It is mainly used in communication networks like internet, telephone, and cable TV.

Explanation

• Fiber optic technology uses cables made of thin strands of glass or plastic fibers to transmit data as light signals.
• It providing high-speed and high-capacity communication.

Explanation

TDM stands for Time Division Multiplexing.

Explanation

Full Duplex allows data to be sent and received simultaneously, making it the fastest communication mode.

In contrast:

Simplex is one-way only.

Half Duplex is two-way but not simultaneous.

Explanation

 Both Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP) cables use twisted pairs of copper wires to transmit data.

The primary difference is that STP cables have additional shielding around the wires to protect against electromagnetic interference

Whereas UTP cables do not have this extra shielding

Explanation

Widely known as a SIM card, is an integrated circuit that is intended to securely store the international mobile subscriber identity number and its related key.

SIM is an acronym that stands for Subscriber Identity Module.