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
81
A laboratory environment equipped with twenty workstations and a shared laser printer is classified as what type of network?
Answer:
Local
A network confined to a small physical space, such as a single laboratory or office, is known as a Local Area Network (LAN). It allows multiple devices to share resources like printers and files efficiently within that specific, restricted geographical area.
82
Which technique allows multiple communication signals to be transmitted simultaneously over a single physical medium?
Answer:
Multiplexing
Multiplexing is a method used in telecommunications and computer networks to combine multiple analog or digital signals into one composite signal over a shared medium. This increases the efficiency of data transmission by allowing several calls or data streams to share the same physical line or frequency band.
83
How many primary modes of data transmission are recognized in networking?
Answer:
3
There are three fundamental modes of data transmission based on the direction of information flow: simplex, half-duplex, and full-duplex. These modes define how data travels between the sender and the receiver in a communication system.
84
What are the essential components required for successful data communication?
Answer:
All of the above
Data communication requires a complete system consisting of a sender (source), a receiver (destination), and a transmission medium (pathway) to carry the data. Additionally, protocols and messages are necessary to ensure the information is transmitted and interpreted correctly.
85
Which network type is designed to provide connectivity across a metropolitan area, such as a city?
Answer:
MAN
A Metropolitan Area Network (MAN) is a computer network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large Local Area Network (LAN) but smaller than the area covered by a Wide Area Network (WAN).
86
What are the essential components required to establish a functional Local Area Network (LAN)?
Answer:
Network card, LAN cables, and LAN software
A functional LAN requires hardware to interface with the network (Network Interface Card), physical media to transmit the signals (cables), and software (drivers and network protocols) to manage the communication and data exchange between the connected devices.
87
What is the term for the maximum displacement or height of a wave from its equilibrium position?
Answer:
Amplitude
Amplitude refers to the peak height or the maximum extent of a vibration or oscillation, measured from the position of equilibrium. In the context of signal processing and wave physics, it represents the strength or intensity of the wave.
88
Which communication mode allows data transmission to occur in only one direction?
Answer:
Simplex
In simplex mode, the communication is unidirectional. Only one device can transmit data, while the other can only receive it. A common example is a broadcast radio or a television transmission where the signal flows one way.
89
What type of transmission mode is used for communication between a computer and a keyboard?
Answer:
Simplex
Communication between a keyboard and a computer is simplex because the keyboard only sends data to the computer, and the computer does not send data back to the keyboard.
90
Which transmission medium utilizes light pulses to transmit data?
Answer:
Fiber optic cable
Fiber optic cables transmit data as pulses of light generated by lasers or LEDs. This method allows for high-speed data transmission over long distances with significantly less signal attenuation and electromagnetic interference compared to copper-based electrical transmission media.