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
101
A switch connects:
Answer:
Both b and c
A switch is used to connect devices, such as computers and printers, within the same network.
102
Networks using different technologies can be connected by:
Answer:
Routers
Routers are used to connect disparate networks and intelligently forward data between them.
103
Which model is better for a small home network for sharing files between a few computers?
Answer:
Peer-to-peer model
For a simple home network, a P2P setup is easy and doesn't require the expense and complexity of a dedicated server.
104
How would QoS be used on a corporate network?
Answer:
To give video conferencing traffic priority over email traffic
This is a classic use of QoS, as video conferencing is sensitive to latency and jitter, while email is not.
105
Which device creates a separate broadcast domain for each connected network?
Answer:
Router
Each interface on a router is in a different broadcast domain, and routers do not forward broadcasts between them.
106
Which network device lets you share an Internet connection with other computers?
Answer:
Router
A router manages traffic between networks and allows multiple devices to share a single internet connection.
107
Does UDP retransmit lost packets?
Answer:
No, it is a "best effort" protocol
UDP does not provide the reliability mechanisms of TCP, such as retransmission of lost packets. It is faster but less reliable.
108
What is a "datagram"?
Answer:
Another name for a packet in a connectionless network
In the context of the IP protocol, which is connectionless, the packets are often referred to as datagrams.
109
Which device is the most intelligent of the three (hub, switch, router)?
Answer:
Router
A router is the most intelligent as it can make complex decisions about the best path for data to travel between networks.
110
Which switch type dedicates the full capacity of a link?
Answer:
Circuit switching
Circuit switching reserves an entire communication path for the duration of the connection.