Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
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
191
Another name for the cable TV central office is what?
Answer:
Head end
The head end is the master facility where cable television signals are received and processed for distribution.
192
What is the purpose of email 'whitelisting'?
Answer:
To ensure emails from specific, trusted senders are always delivered to the inbox.
Whitelisting an email address or domain ensures that emails from those specified sources are never treated as spam and are always delivered to your inbox. It's an explicit trust mechanism.
193
What is the primary benefit of using a dedicated email client (like Outlook or Thunderbird) over webmail (like Gmail or Outlook.com) for managing emails?
Answer:
Dedicated clients can offer offline access to emails and more advanced customization.
Dedicated email clients often provide offline access to downloaded emails, more robust integration with other desktop applications, and a higher degree of customization for rules, filters, and viewing preferences compared to browser-based webmail.
194
When composing an email, which specific field should you use to add recipients who will receive a copy of the message without their email address being visible to other recipients?
Answer:
Bcc
The 'Bcc' field stands for 'Blind Carbon Copy.' When you place an email address in the Bcc field, the recipient receives a copy of the email, but their address is hidden from all other recipients (those in the 'To' and 'Cc' fields, as well as other 'Bcc' recipients). This is useful for privacy, sending mass emails without exposing everyone's address, or discreetly informing someone without other recipients knowing.
'To' is for the primary recipients.
'Cc' (Carbon Copy) is for recipients who receive a copy, and their address is visible to all other recipients.
'Subject' is for the title or topic of the email, not for recipients.
195
Which second-generation cellular system is used in Europe?
Answer:
GSM
GSM (Global System for Mobile Communications) became the dominant 2G standard in Europe and many other parts of the world.
196
Which was designed as an alternative to the T-1 line?
Answer:
HDSL
High-bit-rate Digital Subscriber Line (HDSL) was one of the earliest DSL technologies, offering T-1 speeds over existing copper wires.
197
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.
198
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.
199
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).
200
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.