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
1
What type of malicious software was the widely publicized Melissa virus that emerged in 1999?
Answer:
E-mail virus.
The Melissa virus, which appeared in 1999, was a mass-mailing macro virus.
2
The 'Brain' virus, recognized as the first computer virus for MS-DOS, was developed by two brothers from which country?
Answer:
Pakistan
The Brain virus was created in 1986 by two brothers, Basit and Amjad Farooq Alvi, who were based in Lahore, Pakistan. It was designed to track illegal copies of their medical software.
3
Which of the following is recognized as the first boot sector virus?
Answer:
brian
The Brain virus, created in 1986, is widely considered the first computer virus for the IBM PC. It was a boot sector virus that infected the boot sector of floppy disks formatted with the DOS File Allocation Table file system.
4
Which of the following is generally not a direct result of a computer virus infection?
Answer:
Mother Board Crash
Computer viruses are malicious software programs that affect data and software.
5
What type of computer threat was the Melissa virus, which gained significant notoriety in 1999?
Answer:
E-mail virus
The Melissa virus was a mass-mailing macro virus that spread rapidly through Microsoft Outlook email attachments in 1999.
6
What is the specific term for a logic bomb that triggers based on a pre-defined time or date?
Answer:
Time bomb
A time bomb is a type of malicious code or logic bomb that remains dormant until a specific time or date is reached. Once the trigger condition is met, the malicious payload is executed, often causing damage or disruption to the system.
7
Which type of software is designed to protect devices by identifying, blocking, and removing malicious software?
Answer:
Antivirus
Antivirus software is a security tool used to prevent, detect, and remove malware, including viruses, worms, and ransomware. It performs real-time scanning and heuristic analysis to ensure the integrity and security of the host system.
8
What is the term for a malicious program that gathers user information and transmits it to a third party via the internet?
Answer:
Spybot
A spybot, or spyware, is a type of malicious software designed to gather data from a computer or other device and forward it to a third party without the user's consent.
9
Why are malicious programs commonly referred to as 'viruses'?
Answer:
They can copy themselves and spread.
Computer viruses are named after biological viruses because they share the core characteristic of self-replication. A computer virus attaches itself to other programs or files and spreads from one computer to another as users exchange files or software.
10
Which type of malicious program disguises itself as a legitimate application while performing harmful actions?
Answer:
Trojan Horse
A Trojan Horse is a type of malware that misleads users of its true intent by masquerading as a useful or benign program. Once executed, it can perform unauthorized actions such as deleting files, stealing data, or creating backdoors.