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
201
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.
202
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.
203
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.
204
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.
205
What is the primary function of an email client?
Answer:
To send, receive, and manage emails for a user
An email client (like Outlook or Thunderbird) is an application that allows users to access, compose, send, receive, and organize their emails.
206
Which term refers to unsolicited and typically bulk electronic messages, often commercial in nature, sent without the recipient's prior consent?
Answer:
Spam
The term 'Spam' describes unsolicited bulk electronic messages, most commonly encountered as emails, that are sent without the recipient's explicit consent. These messages are often commercial advertisements, but can also contain scams or malicious content. Phishing (B) is a type of cyberattack where attackers try to trick individuals into revealing sensitive information, often through deceptive emails or websites. Malware (C) is a broad term for malicious software designed to disrupt, damage, or gain unauthorized access to a computer system. Adware (D) is software that displays unwanted advertisements.
207
Which generation of cellular systems aims to provide universal personal communication?
Answer:
Third-generation
Third-generation (3G) systems were designed to provide higher data rates and more universal services like global roaming.
208
Which of the following is a common method for filtering spam emails?
Answer:
Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM).
SPF and DKIM are email authentication methods that help detect when an email is being forged or spoofed, thereby aiding in the identification and filtering of spam.
209
A \_\_ is a curbside unit that connects up to 96 subscriber telephones.
Answer:
Subscriber loop carrier (SLC)
An SLC is a piece of telecommunications equipment that concentrates telephone lines into a single high-speed digital link for connection to the central office.
210
Which protocol is used to send email messages from a client to a server?
Answer:
SMTP
SMTP (Simple Mail Transfer Protocol) is used for sending email messages. POP3 and IMAP are used for retrieving emails, and HTTP is for web browsing.