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
6121
"Tethering" your phone to your laptop creates a:
Answer:
Wireless PAN
Tethering creates a small, personal wireless network to share your phone's internet connection.
6122
Which device operates at the Data Link layer (Layer 2) of the OSI model?
Answer:
Switch
A switch operates at the Data Link layer and uses MAC addresses to forward data to the specific port of the destination device.
6123
The method in public switched telephone systems that creates a direct link between devices is called \_\_\_\_.
Answer:
Circuit switching
Circuit switching establishes a dedicated, end-to-end communication path for the duration of a connection.
6124
A "domain" in Windows is an example of a:
Answer:
Client-server network
A domain is a client-server network that is controlled by a central server called a domain controller.
6125
What is bandwidth?
Answer:
The maximum amount of data that can be transmitted over a network in a given amount of time
Bandwidth is a measure of the capacity of a network connection, often expressed in bits per second (bps). It's like the width of a highway.
6126
What is the main disadvantage of a hub?
Answer:
It creates a single collision domain.
Because a hub broadcasts all data to all ports, it creates a single collision domain, which can lead to network congestion and poor performance.
6127
Which network type typically uses public infrastructure like telephone lines or fiber optic cables provided by a third party?
Answer:
WAN
WANs often rely on the infrastructure of telecommunication companies to connect locations over long distances.
6128
Which card is required to connect a computer to a network?
Answer:
NIC
A Network Interface Card (NIC) is a hardware component necessary for a computer to connect to a network.
6129
Which network type is most susceptible to interference?
Answer:
PAN
PANs, often being wireless and short-range, can be susceptible to interference from other wireless devices.
6130
To secure a wireless network, you should:
Answer:
a) Change the default router password.
These are all good practices for securing a wireless network.