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
141
Which type of malware might a disgruntled employee be most likely to use against their employer?
Answer:
Logic Bomb
A logic bomb is a classic "insider threat" tool. A disgruntled employee could plant a logic bomb in the company's system that is triggered to cause damage (e.g., delete files) after they have left the company.
142
What program would you use to gain administrative rights to someone’s computer?
Answer:
Rootkit
A rootkit is a collection of malicious software designed to enable access to a computer while masking its existence.
143
What is the term for a logic bomb triggered by a specific time?
Answer:
Time bomb
A time bomb is a type of malicious code, or logic bomb, that is created to execute its payload at a specific, predetermined date or time. The malicious action, such as deleting files, will only be triggered when the system clock reaches that time.
144
Which is a problem caused by viruses?
Answer:
All of these
Computer viruses can cause a wide range of damage, including corrupting system files, deleting data, and disrupting normal operations.
145
Which type of malware can spread through both email attachments and removable media like USB drives?
Answer:
Viruses and Worms
Both viruses and worms are capable of spreading through various vectors. A virus can be attached to a file on a USB drive, and a worm could be programmed to copy itself to any removable media that is connected to an infected machine.
146
What is a primary reason for the success of social engineering in spreading malware?
Answer:
It exploits human psychology (trust, fear, curiosity) rather than technical flaws.
for the success of social engineering in spreading malware?
147
Why is it crucial to keep your antivirus software's virus definitions updated?
Answer:
To protect against newly created malware that has been added to the definition database.
New malware is created every day. Updating the virus definitions downloads the latest signatures for these new threats, allowing your AV software to recognize and protect you from them. Without regular updates, the AV is blind to new malware.
148
What was the primary motivation behind the Magecart attacks?
Answer:
Financial gain through the theft of credit card information from e-commerce websites.
Magecart is not a single group but rather an umbrella term for a collection of cybercriminal groups who specialize in "formjacking." They compromise online shopping websites and inject malicious code to skim customer payment card details during the checkout process.
149
The SQL Slammer worm (2003) caused a massive internet slowdown in a very short amount of time by:
Answer:
Exploiting a vulnerability in Microsoft SQL Server and generating a huge amount of network traffic.
SQL Slammer was a tiny worm that spread with astonishing speed. It exploited a known bug in SQL Server and, once infected, a machine would begin firing off a huge number of requests to infect other vulnerable servers, overwhelming networks with traffic.
150
What is the most secure way to dispose of a sensitive document?
Answer:
Using a cross-cut or micro-cut shredder.
Dumpster diving is a real threat. To prevent attackers from recovering sensitive information from discarded paper, documents should be thoroughly destroyed using a cross-cut shredder, which makes reassembly extremely difficult.