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
191
The term "client" can refer to:
Answer:
All of the above
The term "client" can be used to describe the user, the machine, or the program that is making a request.
192
Why are wireless networks often "half-duplex"?
Answer:
Because devices on a Wi-Fi network must take turns to transmit to avoid collisions.
In a wireless network, all devices share the same frequency, so they use a system (CSMA/CA) to listen and wait for the channel to be clear before transmitting, which is a half-duplex operation.
193
What is the future trend in networking?
Answer:
A continued use of hybrid networks, with wireless speeds approaching wired speeds
The future will likely see a mix of both, with wireless technologies becoming faster and more reliable, but wired connections still being important for performance and security.
194
A network of ATMs in a city is an example of a:
Answer:
MAN
ATMs across a city would be connected using a MAN.
195
What is the typical range of a PAN?
Answer:
Up to 10 meters
PANs, especially those using Bluetooth, have a very limited range, typically around 10 meters.
196
Which network type has the lowest data transfer rates?
Answer:
PAN
PANs, while convenient for personal devices, typically have lower data transfer rates than LANs, MANs, and WANs.
197
What is a potential health concern associated with wireless networks?
Answer:
Exposure to radiofrequency (RF) radiation
While there is no scientific consensus on the health effects, some people are concerned about long-term exposure to the radio waves emitted by wireless devices.
198
Which device can reduce network traffic by not forwarding broadcasts?
Answer:
Router
By default, routers do not forward broadcast traffic from one network to another, which helps to contain broadcast storms.
199
What is packet switching?
Answer:
A method of grouping data into packets for transmission over a digital network
Packet switching breaks down a message into smaller pieces called packets, which are then sent independently over the network and reassembled at the destination.
200
Which device would you use to connect two separate LANs?
Answer:
Router
A router is the device specifically designed to connect different networks.