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
6161
In the highway analogy for networking, latency is the:
Answer:
Time it takes for a single car to travel from the start to the end of the highway
Latency represents the travel time for a single piece of data, regardless of how much other data is being sent.
6162
A network connecting a city's government buildings would be a:
Answer:
MAN
A MAN would be used to connect government buildings that are spread across a city.
6163
Which device is concerned with frames?
Answer:
Switch
A switch operates at the Data Link layer, which deals with data in the form of frames.
6164
Which device can perform Network Address Translation (NAT)?
Answer:
Router
NAT is a function of a router that allows multiple devices on a private network to share a single public IP address.
6165
Why might a video streaming service use a protocol like UDP?
Answer:
Because retransmitting a lost packet of video data from a few seconds ago is pointless.
For real-time streaming, it is better to just drop a lost frame and continue with the live stream rather than waiting for a retransmission and causing a delay.
6166
A home Wi-Fi network is an example of a:
Answer:
LAN
A home Wi-Fi network connects devices within a home, which is a small geographical area, so it is a LAN.
6167
Which device is used to connect a LAN to the internet?
Answer:
Router
A router is the gateway between a local area network (LAN) and a wide area network (WAN) like the internet.
6168
What is a "connectionless" protocol?
Answer:
A protocol where each packet is treated independently, without establishing a session first
Protocols like IP and UDP are connectionless. They just send the packets without any prior setup.
6169
What is the purpose of a default gateway?
Answer:
To tell a device where to send traffic that is not on its local network
The default gateway is the IP address of the router, which is the device that connects the local network to other networks.
6170
Which statement is NOT correct?
Answer:
Batch processing is best for telecommunication operations.
Telecommunication favors real-time or interactive processing over batch operations, making the statement incorrect.