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
4501
What is 'greylisting' an email anti-spam technique?
Answer:
Delaying unrecognized incoming emails to deter spam bots.
Greylisting is an anti-spam method where a mail server temporarily rejects an email from an unfamiliar sender. Legitimate mail servers will retry sending, while many spam bots will not, thus filtering them out.
4502
What is the primary purpose of an 'email filter' in a mail client or server?
Answer:
To categorize, block, or redirect emails based on defined rules.
Email filters automatically sort, discard, or move emails to specific folders based on criteria like sender, subject, keywords, or recipient, helping users manage their inbox and combat spam.
4503
A \_\_\_\_ switch is a multi-stage design with microswitches at each stage that direct packets based on the output port’s binary representation.
Answer:
Banyan
A banyan switch is a type of switching network used in telecommunications that uses a specific tree-like structure for routing.
4504
What is a 'bounce message' in email communication?
Answer:
An automated notification that an email could not be delivered.
A bounce message is an automated notification from a mail server indicating that an email could not be delivered to its intended recipient, often due to an incorrect address or a full inbox.
4505
What is the purpose of an 'email signature'?
Answer:
A block of text automatically appended to the end of an email
An email signature is a block of text, often containing the sender's name, title, company, and contact information, that is automatically added to the end of outgoing emails.
4506
The carrier for inter-LATA services is:
Answer:
IXC
An Interexchange Carrier (IXC) is a long-distance telephone company that provides services between LATAs.
4507
The US is divided into several:
Answer:
LATAs
LATAs (Local Access and Transport Areas) are geographic regions in the U.S. that define the areas within which a local telephone company can provide service.
4508
In the context of email, what is a 'mail server'?
Answer:
A computer system that stores and distributes email messages
A mail server is a computer system that receives, stores, and sends email messages on behalf of users. It acts as an intermediary for email communication.
4509
What does 'MIME' stand for in the context of email?
Answer:
Multimedia Internet Mail Extension
MIME (Multipurpose Internet Mail Extension) allows email to support text in character sets other than ASCII, as well as attachments of non-text content such as audio, video, images, and application programs.
4510
What is the function of a 'mailing list'?
Answer:
To send a single email to multiple subscribers simultaneously.
A mailing list allows a sender to send one email to a single address, and that email is then automatically distributed to all subscribers of the list. This facilitates group communication.