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
3681
How does a network handle packet loss?
Answer:
Protocols like TCP will retransmit the lost packet.
The Transmission Control Protocol (TCP) is a reliable protocol that detects and retransmits lost packets to ensure the entire message is received correctly.
3682
What is an "internationalized domain name" (IDN)?
Answer:
A domain name that contains characters from non-Latin alphabets
IDNs make the internet more accessible to people who do not use the Latin alphabet.
3683
Transferring files from the Internet to your computer is called:
Answer:
Downloading
Downloading is the act of acquiring files from online sources to a local drive.
3684
Which device can perform Network Address Translation (NAT)?
Answer:
Router
NAT is a function of a router that allows multiple devices on a private network to share a single public IP address.
3685
What is a "firewall"?
Answer:
A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules
A firewall can help to protect your computer from unauthorized access.
3686
What is a "dead spot" in a wireless network?
Answer:
An area where the Wi-Fi signal is weak or non-existent
Dead spots are areas where the wireless signal is blocked or too far from the access point to provide a stable connection.
3687
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.
3688
The Internet is:
Answer:
A worldwide network of interconnected computers
The Internet connects computers globally using standardized protocols.
3689
If a router's buffer is full and a new packet arrives, what happens?
Answer:
The packet is dropped (packet loss).
This is a common cause of packet loss during periods of network congestion.
3690
What is a "VPN" (Virtual Private Network)?
Answer:
A service that creates a secure, encrypted connection between your computer and the internet
A VPN can help to protect your privacy and security, especially when you are using public Wi-Fi.