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
11
Which switch type combines space-division and time-division technologies for optimal performance?
Answer:
TST
A Time-Space-Time (TST) switch combines time-division and space-division switching to create a highly efficient, non-blocking switching fabric.
12
Which term describes emails that deliver advertisements to a user's inbox without their explicit consent?
Answer:
Spam
Spam is specifically defined as unsolicited and often commercial email, sent in bulk. Newsletters and opt-in mails are usually consensual, and transactional emails are responses to user actions.
13
In which signaling type is the same circuit used for data and signaling?
Answer:
In-band
In-band signaling sends control information on the same communication channel that the user's data is using.
14
What is 'spam' in the context of email?
Answer:
Unsolicited and unwanted bulk emails
Spam refers to unsolicited and often commercial emails sent in bulk to a large number of recipients, typically without their consent.
15
What is generally considered a 'best practice' for password security for email accounts?
Answer:
Creating a long, complex, and unique password.
A strong password that is long, complex (mixture of characters, numbers, symbols), and unique to your email account significantly reduces the risk of unauthorized access.
16
Which fundamental component enables the transmission and reception of electronic mail between users?
Answer:
Network Infrastructure
The core mechanism that permits the exchange of messages within an email system is the 'Network Infrastructure'. While other components like an operating system (for running the email client) and application software (the email client itself) are necessary, they cannot communicate or transmit emails remotely without a network. Local storage is used for saving emails on a device but doesn't facilitate exchange. The network, most commonly the Internet, provides the essential communication pathways and protocols (like SMTP, POP3, IMAP) that allow email messages to travel from one mail server to another, thereby connecting senders and recipients globally.
17
In the context of email communication, what does the abbreviation 'CC' primarily represent?
Answer:
Carbon Copy
In email correspondence, 'CC' is an abbreviation for 'Carbon Copy'. This term originated from the traditional method of using carbon paper to create duplicate physical documents. When an email is sent with recipients in the 'CC' field, a copy of the email is sent to them, and all other recipients (in the 'To' and 'CC' fields) can see who has received the Carbon Copy. This distinguishes it from 'BCC' (Blind Carbon Copy), where recipients are not visible to others.
18
What is the function of a 'Digital Certificate' in secure email communication (e.g., S/MIME)?
Answer:
To verify the identity of the sender and encrypt/decrypt messages.
Digital certificates (like those used with S/MIME) are crucial for secure email. They bind a public key to an individual, allowing for digital signatures (sender verification and integrity) and encryption (confidentiality for the recipient).
19
In ADSL, the largest portion of the bandwidth is used for:
Answer:
Downstream data
Asymmetric Digital Subscriber Line (ADSL) allocates more bandwidth for downloads (downstream) than for uploads (upstream).
20
What is the purpose of an 'out-of-office' reply?
Answer:
To notify senders that you are away and will respond later.
An 'out-of-office' reply (auto-reply) is an automatic message sent to anyone who emails you, informing them that you are temporarily unavailable and providing information on when you expect to respond.