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
21
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.
22
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.
23
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.
24
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.
25
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.
26
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.
27
What is the purpose of Message Encryption?
Answer:
To prevent unauthorized people from reading the content of your email
Encryption scrambles the content of the message so that it can only be read by the intended recipient who has the key to unscramble it, protecting its confidentiality during transit.
28
Conversely, adding an address to the "Blocked Senders List" will:
Answer:
Always move emails from that sender directly to the Junk Email folder
The Blocked Senders List is a blacklist. It forces the filter to always treat emails from these addresses as junk, regardless of their content.
29
If you add a sender's email address to the "Safe Senders List," what happens?
Answer:
Their emails will never be treated as junk mail by the filter
The Safe Senders List is a whitelist. It tells the Junk Email Filter to always trust emails from these specific addresses and deliver them to your inbox.
30
What is "phishing"?
Answer:
A fraudulent attempt, usually made through email, to trick you into revealing sensitive personal information like passwords or credit card numbers
Phishing emails often look like they are from legitimate companies but contain malicious links or attachments designed to steal your information.