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
6351
Why should you be cautious about emails that create a sense of urgency, such as "Your account will be closed in 24 hours"?
Answer:
Because this is a common tactic used in phishing emails to make you act quickly without thinking
Creating panic or urgency is a social engineering technique designed to bypass your rational judgment. Legitimate companies rarely use such high-pressure tactics for routine account notices.
6352
What is a "delivery receipt"?
Answer:
A confirmation from the recipient's mail server that the email has been successfully delivered to their mailbox
A delivery receipt confirms the message reached the mailbox. A read receipt confirms the recipient opened it. Delivery confirmation happens first and is more reliable.
6353
Two-Factor Authentication (2FA) for your email account adds a layer of security by:
Answer:
Requiring something you know (your password) and something you have (like a code from your phone)
2FA provides a major security boost. Even if a thief steals your password, they cannot access your account without also having physical access to your phone or other second factor.
6354
Outlook may display a warning banner at the top of an email that says, "This sender failed our fraud detection checks." This indicates:
Answer:
The email may be a "spoofed" email, where the sender's address is forged
This warning appears when security checks like SPF or DKIM fail, suggesting that the email might not actually be from the person or organization it claims to be from. You should be very cautious with such messages.
6355
What does S/MIME stand for in the context of email security?
Answer:
Secure/Multipurpose Internet Mail Extensions
S/MIME is a widely used standard for public key encryption and digital signatures for email, providing both confidentiality and authentication.
6356
The "Report Message" button in modern Outlook allows you to:
Answer:
Report an email as Junk or Phishing to help improve the email filtering system
This feature allows users to actively participate in identifying spam and phishing threats. Reporting these messages helps Microsoft and your organization's IT team refine their filters to better protect everyone.
6357
What is a "read receipt"?
Answer:
A notification sent back to the sender when the recipient has opened the email
A sender can request a read receipt, but the recipient usually has the option to decline to send it. It provides confirmation of viewing but not necessarily that the content was understood.
6358
You receive an email with a link that looks legitimate, but hovering your mouse over it reveals a different, suspicious web address. This is a common sign of:
Answer:
A phishing attempt
Phishers often disguise malicious links with hyperlink text that looks safe. Always hover over links before clicking to see the true destination URL in the status bar or a tooltip.
6359
Why does Outlook block certain types of attachments (e.g., .exe, .bat, .js) by default?
Answer:
Because they are executable files that are commonly used to spread viruses and malware
This is a critical security feature. By blocking potentially dangerous file types, Outlook helps protect your computer from being infected by malicious programs disguised as harmless attachments.
6360
A "Digital Signature" attached to an email provides what two assurances?
Answer:
That the sender is who they claim to be (authentication) and that the message has not been altered (integrity)
A digital signature acts like a tamper-proof seal. It verifies the sender's identity and ensures that the content of the email has not been changed since it was sent.