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
4521
The 'To' field in an email is used for:
Answer:
Primary recipients who are expected to respond or take action.
The 'To' field is for the primary recipients of the email, those for whom the message is directly intended and who are typically expected to respond or take action.
4522
What is the main function of the 'Subject' line in an email?
Answer:
To provide a concise summary or topic of the email's content.
The subject line is a critical part of an email, offering a brief, informative overview of the email's content. It helps recipients quickly understand the purpose of the email and prioritize accordingly.
4523
What does a DMARC record help email servers to do?
Answer:
Determine if an email is legitimate and how to handle authentication failures.
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that builds on SPF and DKIM, telling receiving mail servers what to do with messages that fail authentication (e.g., quarantine, reject).
4524
Which of the following is an example of Synchronous Communication?
Answer:
Instant Messaging (Chat)
Synchronous communication occurs in real-time, requiring all parties to be present simultaneously. Instant Messaging (Chat) is a prime example. Email and forum posts are asynchronous.
4525
Which security measure helps prevent unauthorized access to an email account by requiring a second verification step?
Answer:
Two-Factor Authentication (2FA)
Two-Factor Authentication (2FA) adds an extra layer of security by requiring two distinct forms of identification before granting access, such as a password and a code from a mobile device.
4526
Why is it important to regularly clear your email inbox of old, unnecessary emails?
Answer:
To free up server storage space and prevent hitting storage limits.
Regularly clearing unnecessary emails helps manage your inbox, prevents you from exceeding storage quotas on mail servers, and can contribute to better overall email management. While it might marginally improve performance, storage is the primary benefit.
4527
Which protocol is used by email clients to retrieve emails, allowing them to remain on the server?
Answer:
IMAP
IMAP (Internet Message Access Protocol) allows email clients to access email on a remote web server and keep the messages on the server. POP3 downloads them and often deletes them from the server.
4528
What is the primary purpose of 'BCC' in an email?
Answer:
To hide the recipients' email addresses from each other
BCC (Blind Carbon Copy) is used to send a copy of an email to recipients without revealing their email addresses to other recipients of the same email.
4529
What is the primary function of an email client?
Answer:
To send, receive, and manage emails for a user
An email client (like Outlook or Thunderbird) is an application that allows users to access, compose, send, receive, and organize their emails.
4530
Which term refers to unsolicited and typically bulk electronic messages, often commercial in nature, sent without the recipient's prior consent?
Answer:
Spam
The term 'Spam' describes unsolicited bulk electronic messages, most commonly encountered as emails, that are sent without the recipient's explicit consent. These messages are often commercial advertisements, but can also contain scams or malicious content. Phishing (B) is a type of cyberattack where attackers try to trick individuals into revealing sensitive information, often through deceptive emails or websites. Malware (C) is a broad term for malicious software designed to disrupt, damage, or gain unauthorized access to a computer system. Adware (D) is software that displays unwanted advertisements.