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
221
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.
222
A "hop" in networking refers to:
Answer:
The passage of a packet through a router
Each time a packet is forwarded by a router, it is considered one hop.
223
What is "web beacon"?
Answer:
A small, invisible image that is embedded in a web page or email to track your activity
Web beacons are often used by advertisers and email marketers.
224
Which network type would be used to connect the different branches of a bank in a city?
Answer:
MAN
A MAN would be the most appropriate choice to connect multiple bank branches within the same city, as it is designed for this scale of networking.
225
Which technology is the basis for communication on the internet?
Answer:
Packet switching
The internet is a massive packet-switched network.
226
What is "doxing"?
Answer:
The act of publicly identifying or publishing private information about someone, especially as a form of punishment or revenge
Doxing is a serious form of online harassment.
227
Which technology is commonly used for PANs?
Answer:
Bluetooth
Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances, making it ideal for PANs.
228
What are Boolean operators in the context of search engines?
Answer:
Words like "AND", "OR", and "NOT" that can be used to refine search queries
Boolean operators can help you to narrow down or broaden your search results.
229
What causes network congestion?
Answer:
Too much data being sent for the network to handle
Congestion occurs when the demand for network resources exceeds the available bandwidth, causing delays and packet loss.
230
A network that connects several LANs in different cities is a:
Answer:
WAN
A Wide Area Network (WAN) is required to connect LANs that are geographically separated by long distances, such as in different cities.