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
4011
Which device learns the MAC addresses of connected devices?
Answer:
Switch
A switch builds a MAC address table to learn which devices are on which ports.
4012
What is a "distributed denial-of-service" (DDoS) attack?
Answer:
A DoS attack that is launched from multiple computers
DDoS attacks are more powerful and more difficult to defend against than regular DoS attacks.
4013
What is a "new top-level domain" (nTLD)?
Answer:
A gTLD that was introduced after 2012
There are now hundreds of nTLDs available, such as ".app", ".blog", and ".shop".
4014
What is another name for junk email?
Answer:
Spam
Spam refers to unsolicited and often unwanted email messages.
4015
The fundamental trade-off in network design is often between:
Answer:
All of the above
Network design involves balancing many competing factors. For example, a very high-bandwidth, low-latency connection (like dedicated fiber) is very expensive. Similarly, very high security can sometimes make a network harder to use.
4016
In the highway analogy for networking, bandwidth is the:
Answer:
Number of lanes on the highway
More lanes (higher bandwidth) allow more cars (data) to travel at the same time.
4017
What does the "do not track" (DNT) feature in a browser do?
Answer:
It sends a request to websites asking them not to track your browsing activity.
The DNT header is a request, and websites are not required to honor it.
4018
What is a key feature of a MAN?
Answer:
It covers a geographic area larger than a LAN but smaller than a WAN.
The defining characteristic of a MAN is its intermediate size, fitting between a LAN and a WAN.
4019
Which network type has the highest latency?
Answer:
WAN
Due to the long distances that data has to travel, WANs typically have the highest latency compared to other network types.
4020
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.