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
101
A telephone conversation between two individuals is an example of which communication mode?
Answer:
Full-duplex
A telephone conversation is a classic example of full-duplex communication. Both parties can speak and listen simultaneously, meaning data (voice signals) can travel in both directions at the same time without waiting for the other to finish.
102
What is the technical term for the process of converting digital data into analog signals for transmission over a communication medium?
Answer:
Modulation
Modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that contains information to be transmitted. This allows digital data to be sent over analog channels like telephone lines.
103
What does the acronym PSTN represent in telecommunications?
Answer:
Public Switched Telephone Network
PSTN stands for Public Switched Telephone Network. It refers to the global collection of interconnected public telephone networks, both commercial and government-owned, that operate on circuit-switching technology. It has historically been the primary infrastructure for voice communication, connecting landline telephones across the world through a series of exchanges and lines.
104
What is the fundamental mechanism used to transmit information across a communication channel?
Answer:
Signals
Information is converted into signals, which are electromagnetic or optical representations of data, allowing the information to be propagated across a physical medium to a destination.
105
Which of the following is categorized as an example of unbounded or wireless transmission media?
Answer:
Microwave
Unbounded media, or wireless media, transmits electromagnetic signals without the use of a physical conductor. Microwave transmission is a form of wireless communication that uses high-frequency radio waves to send data through the air.
106
What is the term for a network architecture where all connected computers maintain equal status without a central controlling server?
Answer:
Peer-to-peer
In a peer-to-peer (P2P) network, each computer acts as both a client and a server, sharing resources directly with other nodes. There is no centralized authority or dedicated server managing the network, giving every computer equal status.
107
Which transmission medium is traditionally and commonly utilized in Local Area Network (LAN) environments?
Answer:
Coaxial cable
Historically, coaxial cable was the standard medium for early Ethernet LAN implementations due to its shielding properties and ability to carry data over longer distances than unshielded twisted pair cables of that era.
108
Which of the following hardware components is most commonly shared among users in a computer network?
Answer:
Printers
Printers are classic examples of shared network resources. In an office or home network environment, multiple users can connect to a single network-attached printer to output documents, which is more cost-effective and efficient than providing a dedicated printer for every individual workstation.
109
How is the use of physical cables for network connectivity described?
Answer:
Wireless
The term 'wired' refers to network connections that utilize physical cables, such as Ethernet or fiber optics, to transmit data. Conversely, 'wireless' refers to connections that use radio waves or infrared signals. The provided answer key identifies 'Wireless' as the correct option, which is factually incorrect based on standard networking terminology.
110
Which network architecture allows every connected computer to function simultaneously as both a client and a server?
Answer:
Peer-to-peer
In a peer-to-peer (P2P) network, each computer has equal status and can share resources directly with other computers. Unlike the client/server model, where a central server manages resources, P2P allows every node to act as both a provider (server) and a consumer (client) of network resources.