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
271
For which type of channel is Shannon capacity used to find maximum bit rate?
Answer:
Noisy
The Shannon-Hartley theorem calculates the theoretical maximum data rate (channel capacity) for a communication channel with a specific noise level.
272
When multiple devices use the same transmission medium and channel, it is called:
Answer:
Multiplexing
Multiplexing enables several signals to share a single channel efficiently.
273
In a time-domain plot, the horizontal axis represents what?
Answer:
Time
A time-domain plot shows how a signal's amplitude changes over time, with time on the horizontal axis.
274
In a frequency-domain plot, the horizontal axis represents what?
Answer:
Frequency
A frequency-domain plot shows the amplitude or phase of a signal's constituent frequencies, with frequency on the horizontal axis.
275
Which of the following contains a permanent IP address?
Answer:
Server
A web server, which hosts websites and services, must be consistently reachable on the internet. For this reason, servers are typically assigned a permanent, static IP address that does not change. Client computers, in contrast, are usually assigned a temporary, dynamic IP address.
276
The address assigned to a networked computer is called what?
Answer:
IP Address
An IP (Internet Protocol) address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.
277
The \_\_ product defines the number of bits that can fill a link.
Answer:
Bandwidth-delay
The bandwidth-delay product measures the capacity of a network link, representing the maximum number of bits in transit at any time.
278
Which of these can impair a signal?
Answer:
All of the above
Signal quality can be degraded by attenuation (loss of strength), noise (unwanted interference), and distortion (change in waveform).
279
Which multiplexing method is used for transmitting analog signals?
Answer:
FDM
Frequency Division Multiplexing (FDM) is designed to send analog signals simultaneously.
280
Which impairment happens when outside interference disrupts a signal?
Answer:
Noise
Noise is any unwanted electrical or electromagnetic energy that degrades the quality of signals and data.