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
71
An email system (e.g., Gmail) is an example of:
Answer:
Client-server model
Your email client (like a web browser or a mobile app) connects to a mail server to send and receive messages.
72
Which device uses IP addresses to make forwarding decisions?
Answer:
Router
Routers examine the destination IP address of a packet to determine the best path to send it to its destination network.
73
What is the primary advantage of packet switching over circuit switching?
Answer:
It is more efficient in its use of network resources.
Packet switching allows multiple users to share the same network connection, as packets can be interleaved, which is much more efficient than dedicating a circuit for each communication.
74
A "bottleneck" in a network is:
Answer:
A point of congestion that slows down the entire network
A bottleneck is a component that limits the overall performance of a system, like a single slow link in an otherwise fast network.
75
What is the main advantage of a wired network over a wireless network?
Answer:
Speed and reliability
Wired networks generally offer faster speeds and a more stable, reliable connection than wireless networks.
76
Which technology is the basis for communication on the internet?
Answer:
Packet switching
The internet is a massive packet-switched network.
77
The process of reassembling packets in the correct order at the destination is handled by:
Answer:
The operating system's network stack (e.g., TCP)
Packets are given sequence numbers so that the receiving computer's TCP/IP stack can put them back in the right order.
78
The time it takes for a router to process a packet's header is part of the:
Answer:
Latency
Processing delay at each network device contributes to the overall end-to-end latency.
79
What must be installed on a network to share a broadband Internet connection?
Answer:
Router
A router is used to distribute a single internet connection to multiple devices on a local network.
80
What is a disadvantage of a wired network?
Answer:
It limits the mobility of devices.
Devices on a wired network are tethered by a cable, which restricts where they can be used.