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
When composing an email, what is the primary function of utilizing the 'BCC' field for a recipient?
Answer:
To send a hidden copy of the email to a recipient, whose address remains undisclosed to others.
The 'BCC' field stands for 'Blind Carbon Copy.' Its primary function is to allow you to send a copy of an email to recipients without revealing their email addresses to other recipients in the 'To,' 'Cc,' or even other 'BCC' fields. This is particularly useful for maintaining privacy, sending mass emails without exposing everyone's contact information, or informing someone discreetly about a conversation without their direct involvement being known to others.
82
Which of the following describes a 'phishing' attack?
Answer:
Sending fraudulent emails to trick recipients into revealing sensitive information.
Phishing involves deceptive emails or messages designed to trick individuals into disclosing personal information like passwords or credit card numbers, often by impersonating a trustworthy entity.
83
What is the typical port number used by SMTP for sending email?
Answer:
25
SMTP typically uses port 25 for sending emails. Port 80 is for HTTP, 110 for POP3, and 443 for HTTPS.
84
In which signaling type is bandwidth split for data and signaling separately?
Answer:
Out-of-band
Out-of-band signaling uses a separate, dedicated channel for control and signaling information.
85
When configuring an email client, what is the role of the 'outgoing mail server' setting?
Answer:
It defines the server responsible for sending your emails.
The outgoing mail server setting (typically an SMTP server) tells your email client which server to use for sending emails you compose. The incoming mail server (POP3 or IMAP) is for receiving.
86
The \_\_ is located in the telephone company’s central office and can handle thousands of calls.
Answer:
Local exchange switch
A local exchange switch is the central component of a local telephone exchange that connects subscribers to each other and to other exchanges.
87
What is the correct format for an email address?
Answer:
username@domainname.extension
The standard format for an email address is 'username@domainname.extension', where the username identifies the individual and the domain name identifies the mail server.
88
Which of the following describes a 'hard bounce' in email delivery?
Answer:
A permanent delivery failure, indicating the email address is invalid or non-existent.
A hard bounce signifies a permanent reason an email cannot be delivered, such as the recipient's email address being invalid, fake, or permanently closed. Unlike a soft bounce, retries are usually futile.
89
What is a 'digital signature' in the context of email?
Answer:
A cryptographic method to verify the sender's identity and ensure message integrity.
A digital signature uses cryptography to provide authentication of the sender's identity and ensures that the message has not been altered in transit, similar to a handwritten signature but with much stronger assurance.
90
In email communication, what does 'Netiquette' refer to?
Answer:
The set of social conventions and good manners for online communication.
Netiquette (network etiquette) is the set of informal rules governing acceptable and expected behavior, civility, and good manners when communicating over the internet, including email.