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
41
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.
42
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.
43
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.
44
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.
45
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).
46
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.
47
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.
48
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.
49
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.
50
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.