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
391
Which application is most sensitive to jitter?
Answer:
Voice over IP (VoIP)
For real-time conversations like a phone call, inconsistent packet delays (jitter) can cause the audio to sound choppy and distorted.
392
What does a switch do when it receives a frame with an unknown destination MAC address?
Answer:
It floods the frame to all ports except the one it came in on.
When a switch doesn't know where a destination MAC address is, it acts like a hub and floods the frame to all ports to ensure it reaches its destination.
393
Which of the following is a valid website address?
Answer:
[www.it.com](https://www.it.com)
A valid website address, or URL, typically consists of a subdomain (like `www`), a domain name (like `it`), and a top-level domain (like `.com`). `www.it.com` follows this structure. The other options are missing a component or contain invalid characters.
394
What is the "General Data Protection Regulation" (GDPR)?
Answer:
A law in the European Union that regulates the collection and use of personal data
The GDPR has had a major impact on how websites handle cookies and other user data.
395
How do you register a service worker?
Answer:
By using the `navigator.serviceWorker.register()` method in JavaScript
This is the first step in using a service worker.
396
Which device is best for a small home network with a few computers?
Answer:
A combination of a switch and a router.
Most home networks use a wireless router, which is a combination of a router, a switch, and a wireless access point.
397
Which of the following is a characteristic of a LAN?
Answer:
High data transfer rates
LANs typically offer high data transfer rates because of the short distances involved and the use of high-speed cabling like Ethernet.
398
The domain name system (DNS) was introduced in:
Answer:
1983
The DNS was created in 1983 to make the Internet more user-friendly by allowing users to refer to computers by names rather than numerical IP addresses.
399
A commonly used graphic format on the web is:
Answer:
GIF
GIF is a standard image format widely used online.
400
Which browser was the first to pass the Acid3 test with a perfect score of 100/100?
Answer:
Opera
Opera was the first browser to achieve a perfect score on the Acid3 test, which tests a browser's compliance with web standards.