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
1301
How can you back up your important files to protect them from ransomware?
Answer:
Both A and B are good backup strategies.
Having a recent backup of your files is the best defense against ransomware. The 3-2-1 backup rule (3 copies, on 2 different media, with 1 off-site) is a good guideline. Emailing files to yourself is not a robust backup solution.
1302
A company's "clean desk" policy is a defense against what type of attack?
Answer:
Shoulder surfing and information theft
A clean desk policy, which requires employees to clear their desks of sensitive documents when they are not present, helps prevent casual information theft by visitors or unauthorized personnel, and also limits the effectiveness of shoulder surfing.
1303
What is "spear phishing"?
Answer:
A phishing attack that targets a specific individual or organization
Spear phishing is a more targeted form of phishing where the attacker customizes the attack for a specific individual, company, or organization to make the fraudulent message seem more authentic and convincing.
1304
Why is it a good idea to have different passwords for different online accounts?
Answer:
If one account is compromised, the attackers won't be able to access your other accounts.
This practice, known as avoiding password reuse, is a critical security measure. If you use the same password everywhere, a data breach at one website could lead to all of your online accounts being compromised.
1305
Which cyberattack floods a network or website with excessive traffic to make it unavailable?
Answer:
DoS attack
A Denial-of-Service (DoS) attack aims to make a machine or network resource unavailable to its intended users by overwhelming it with a flood of internet traffic.
1306
What is "shoulder surfing"?
Answer:
Looking over someone's shoulder to see their password or other sensitive information as they type it.
Shoulder surfing is a direct observation technique used to obtain information. It can be done in person or even from a distance using binoculars or hidden cameras.
1307
What does the term "clickbait" refer to?
Answer:
Content whose main purpose is to attract attention and encourage visitors to click on a link to a particular web page.
Clickbait headlines are often sensationalized or misleading to exploit curiosity. While not always malicious, clickbait links can sometimes lead to websites with malware or scams.
1308
What is the principle of "reciprocity" in social engineering?
Answer:
The idea that if someone does you a small favor, you are more likely to do a bigger favor for them in return.
Social engineers often exploit the human tendency to want to repay a favor. They might offer a small piece of helpful information or a minor service to make the target feel indebted and more willing to comply with a later, more significant request.
1309
Why do phishing websites often have a short lifespan?
Answer:
They are quickly identified and shut down by authorities or hosting providers.
Security researchers and automated systems are constantly working to identify and blacklist phishing sites. Once a site is flagged, it is often taken down quickly, so scammers have to constantly create new ones.
1310
Before entering your credit card information on a shopping website, you should always check for:
Answer:
A padlock icon and "HTTPS" in the address bar.
It is crucial to ensure that any website where you enter sensitive financial information uses an encrypted HTTPS connection to protect your data from being intercepted.