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
261
Before data is transmitted, it must be transformed into what?
Answer:
Electromagnetic signals
Data must be converted into electromagnetic signals (like radio waves, electrical signals, or light pulses) to be transmitted over a physical medium.
262
What does IP stand for in networking?
Answer:
Internet Protocol
IP governs the format of data sent over the internet and assigns unique addresses to devices.
263
Which component is essential for channel separation in FDM?
Answer:
Bandpass filters
Bandpass filters are required to separate channels in Frequency Division Multiplexing.
264
If wave A’s frequency is double that of wave B, B’s period is:
Answer:
Twice A’s
Period is the inverse of frequency (T=1/f). If A's frequency is 2f, its period is 1/(2f). If B's frequency is f, its period is 1/f, which is twice A's period.
265
A numerical identification and logical address assigned to network devices is called what?
Answer:
Internet Protocol address
An Internet Protocol (IP) address is a unique numerical label used to identify a device on a network.
266
Which of the following is an example of digital, rather than analog, communication?
Answer:
DDD
DDD refers to a digital direct distance dialing system.
267
Multiplexing requires how many paths and channels?
Answer:
Multiple paths, one channel
Multiplexing allows multiple signals to share a single channel, utilizing various paths.
268
A(n) \_\_ signal is a composite analog signal with infinite bandwidth.
Answer:
Digital
A perfect digital signal, represented as a square wave, is theoretically composed of an infinite number of sine waves, giving it infinite bandwidth.
269
In TCP/IP, a port address is how many bits long?
Answer:
16
TCP/IP uses 16-bit port numbers to identify specific applications or processes running on a host.
270
Which channel type transmits data at a relatively slow pace?
Answer:
Narrow band channel
Narrow band channels support low-speed data communications.