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
4511
Which of these communication methods is considered 'asynchronous'?
Answer:
Email
Asynchronous communication does not require immediate responses and allows parties to communicate at their convenience. Email is a classic example, unlike real-time methods like video conferencing or phone calls.
4512
Which feature allows users to organize their emails into different folders within an email client?
Answer:
Labels/Folders
Email clients provide features like folders or labels to allow users to categorize and organize their incoming and outgoing emails, improving manageability and searchability.
4513
Another term for the cable TV office is:
Answer:
Head end
The headend is the central point in a cable television system where signals are received, processed, and distributed to subscribers.
4514
In a banyan switch with 8 inputs and 8 outputs, how many stages are there?
Answer:
3
The number of stages in a banyan switch is calculated as log₂(N), where N is the number of inputs. log₂(8) = 3.
4515
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.
4516
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.
4517
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.
4518
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.
4519
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.
4520
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.