Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
71
Which component is required to facilitate the transmission of data, instructions, and information between devices?
Answer:
Channel device
A communication channel serves as the physical or logical pathway that connects the sending and receiving devices, allowing data to travel from one point to another within a network system.
72
Which statement accurately describes a common challenge in telecommunications?
Answer:
it's not always easy for users of one network to communicate with users of another network
Interoperability remains a significant challenge in telecommunications. Due to the diversity of network architectures, protocols, and standards, seamless communication between disparate systems or networks is not always guaranteed, often requiring complex gateways or translation layers to bridge the gaps.
73
What is the term for an IP address that remains constant and does not change frequently?
Answer:
Static
A static IP address is a manually configured address that does not change. Unlike dynamic IP addresses, which are assigned by a DHCP server and may change over time, a static IP provides a consistent identifier for a device on a network.
74
What term describes the physical path or channel through which data signals travel in a network?
Answer:
Medium
In networking, the transmission medium is the physical path that connects the sender and the receiver. Examples include twisted-pair cables, coaxial cables, fiber-optic cables, and wireless radio waves, which carry the data signals between devices.
75
What term describes the process of transmitting data from one point to another?
Answer:
Data communication
Data communication is the exchange of data between two or more devices via some form of transmission medium, such as a wire cable or wireless signal. It involves the transfer and reception of information across a network.
76
When transmitting digital data from a computer over traditional telephone lines, into what format must the signals be converted?
Answer:
Analog signals
Traditional telephone lines were originally designed to carry voice traffic, which is analog in nature. Therefore, digital data generated by a computer must be modulated into analog signals to be transmitted over these lines, a process typically performed by a modem.
77
What is the full form of the acronym LAN in the context of computer networking?
Answer:
Local Area Network
LAN stands for Local Area Network. It is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus, or office building. It is defined by its relatively small geographical scope compared to larger networks like MANs or WANs.
78
How does the bandwidth capacity of a coaxial cable typically compare to that of a standard twisted pair cable?
Answer:
40 times greater than twisted pair
Coaxial cable is designed with a central conductor and shielding that allows for higher frequency transmission and greater bandwidth compared to traditional twisted pair cabling, historically cited as providing significantly higher capacity for data signals.
79
What is the full form of the networking term UTP?
Answer:
Unshielded Twisted Pair
UTP stands for Unshielded Twisted Pair. It is a popular type of copper cabling used in telecommunications and computer networking, consisting of pairs of insulated wires twisted together to reduce electromagnetic interference and crosstalk between adjacent pairs.
80
Which transmission mode allows data to flow in both directions, but not simultaneously?
Answer:
Half Duplex mode
Half-duplex communication allows data to be transmitted in both directions between two devices, but only one direction at a time. An example of this is a walkie-talkie, where one party must finish speaking before the other can begin. This differs from simplex (one-way only) and full-duplex (simultaneous two-way) modes.