Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
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
181
Which cable carries signals as pulses of light through glass?
Answer:
Fiber optics
Fiber optic cables transmit data using light pulses, which allows for very high bandwidth and long-distance communication.
182
What is the minimum number of wires necessary for serial data transfer?
Answer:
2
At least two wires are required;
183
What is the physical path over which a message travels called?
Answer:
Medium
The transmission medium (or channel) is the physical pathway that connects the sender and receiver and allows the message to travel between them. Examples include twisted-pair wire, coaxial cable, fiber-optic cable, and wireless signals (radio waves).
184
Which device is used to convert digital signals into analog signals for communication?
Answer:
Modem
A modem modulates and demodulates signals for data transmission between digital devices and analog networks.
185
Which cable uses light to transmit data?
Answer:
Fiber optic cable
Fiber optic cable is unique in that it transmits data as pulses of light through thin strands of glass or plastic fiber. This allows for extremely high speeds, greater bandwidth, and immunity to electromagnetic interference compared to traditional copper cables.
186
What is a type of network topology?
Answer:
BUS
LAN, WAN, and MAN are classifications of networks based on their geographical scale. A bus topology, however, describes the physical layout of a network, where all devices are connected to a single central cable, called the bus or backbone.
187
Which of the following is regarded as a broadband communication medium?
Answer:
All of the above
Broadband channels support high data rates and can include coaxial cables, fiber optics, and microwave circuits.
188
Multiple repeaters in communication satellites are known as:
Answer:
Transponders
Satellite transponders receive, amplify, and retransmit signals at new frequencies.
189
Which device is used to amplify and extend Wi-Fi signals?
Answer:
Repeater
A repeater boosts and extends Wi-Fi signals to cover larger areas.
190
In synchronous modems, the receive equalizer is also called:
Answer:
Compromise equalizer
The receive equalizer in modems is commonly termed the compromise equalizer.