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
51
How is a computer virus best defined in the field of information technology?
Answer:
A computer program
A computer virus is a specific type of malicious computer program that, when executed, replicates itself by modifying other computer programs and inserting its own code. It is entirely software-based and requires a host program to function and spread.
52
What is the correct term for a computer virus that is written specifically using a macro programming language?
Answer:
Macro Virus
A macro virus is a virus that is written in a macro language, which is often used for software applications like Microsoft Word or Excel. These viruses are embedded within documents and execute automatically when the document is opened, potentially spreading to other files.
53
How can computer viruses negatively impact a system?
Answer:
All of these
Computer viruses are malicious programs designed to disrupt, damage, or gain unauthorized access to a computer system. They can consume system resources, leading to significant performance degradation (slowing down), cause critical system failures (crashing), or compromise data security by exfiltrating or rerouting sensitive information to external parties.
54
What is the term for a logic bomb that is programmed to execute its payload at a specific time?
Answer:
Time bomb
A time bomb is a specific category of logic bomb. It is malicious code that remains dormant within a system until a predetermined time or date is reached, at which point it triggers its malicious payload, such as deleting files or corrupting data.
55
Which type of malicious software is designed to execute immediately upon the startup of a computer system?
Answer:
Boot sector
A boot sector virus is a type of malware that infects the master boot record (MBR) or the boot sector of a storage device. Because the computer executes the code in these sectors during the initial power-on self-test (POST) process, the virus is loaded into memory before the operating system even starts, allowing it to control the system.
56
Which nationality were the brothers credited with creating the Brain computer virus?
Answer:
Pakistani
The Brain virus, which is widely considered the first IBM PC compatible virus, was created in 1986 by two brothers, Basit and Amjad Farooq Alvi, who were based in Lahore, Pakistan. The virus was designed to track software piracy of their medical software, but it eventually spread globally, marking a significant moment in the history of computer security and malware development.
57
What is the term for an application program designed to surreptitiously collect user information and transmit it to a third party?
Answer:
Spybot
Spyware, often referred to as a spybot when referring to the specific program, is software that enables a user to obtain covert information about another's computer activities by transmitting data covertly from their hard drive to a remote location.
58
Which term describes a malicious program designed to replicate itself by infecting other programs or storage media?
Answer:
Virus
A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be infected. Viruses typically spread between programs or across different storage media like disks.
59
Which of the following is considered a type of computer virus or malicious software?
Answer:
Chernobyl
The Chernobyl virus (also known as CIH) is a famous destructive computer virus. Logic bombs and Trojan Horses are also forms of malicious software. Since all items listed are recognized as types of malware, the correct answer encompasses all the provided options.
60
Which type of computer program is specifically designed to disrupt or interfere with normal computer operations?
Answer:
Virus
A computer virus is a malicious software program that replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be infected, which leads to system disruption, data loss, or performance degradation.