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
81
What is "Quality of Service" (QoS)?
Answer:
A feature that allows a network to prioritize certain types of traffic
QoS is used to ensure that critical, time-sensitive applications (like VoIP) get the bandwidth and low latency they need, even when the network is busy.
82
What is the main job of the server in a client-server network?
Answer:
To listen for and respond to requests from clients
A server's primary function is to wait for requests from clients and then fulfill those requests.
83
If you receive an email from someone unknown, what is the safest action?
Answer:
Delete it without opening
Opening unknown emails risks malware or phishing attacks.
84
What is a "thin client"?
Answer:
A client computer that relies heavily on the server for processing
A thin client is a lightweight computer that has its processing and data storage done on a central server.
85
Internet addresses usually include:
Answer:
Country name and organization type
Addresses often reflect country codes and entity types.
86
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.
87
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.
88
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.
89
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.
90
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.