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
3951
Why are wireless networks often "half-duplex"?
Answer:
Because devices on a Wi-Fi network must take turns to transmit to avoid collisions.
In a wireless network, all devices share the same frequency, so they use a system (CSMA/CA) to listen and wait for the channel to be clear before transmitting, which is a half-duplex operation.
3952
A network operating system (NOS) like Windows Server is required for which model?
Answer:
Client-server model
A network operating system is specialized software that runs on the server to manage network resources and security.
3953
Which model offers better performance when many users access the same resource?
Answer:
Client-server model
A powerful, dedicated server can handle simultaneous requests from many clients more efficiently than a peer computer that is also being used for other tasks.
3954
Which is NOT a physical medium for a wired network?
Answer:
Air
Air is the medium for wireless networks, not wired ones.
3955
The concept of packet switching was developed by:
Answer:
Donald Davies and Paul Baran
The concept of packet switching, which is fundamental to how data is transmitted over the Internet, was independently developed by Donald Davies and Paul Baran in the 1960s.
3956
Which button refreshes a webpage in most browsers?
Answer:
F5
F5 reloads the current webpage in most browsers, updating content.
3957
Which type of tracking file is commonly accepted from internet websites?
Answer:
Cookies
Cookies are small text files stored on a user's device by a web browser to remember information like login status, site preferences, and shopping cart items.
3958
What is the name of the browser that comes pre-installed on most Android devices?
Answer:
Google Chrome
Google Chrome is the default browser on most Android smartphones and tablets.
3959
What is a key characteristic of the client-server relationship?
Answer:
It is a many-to-one relationship (many clients to one server).
Typically, a single server is designed to serve requests from many different clients.
3960
Small programs on a web page for animation or form validation are:
Answer:
Applets
Applets are small applications embedded in web pages.