Security Threats and prevention Verified Exam Questions and Answers
Latest update 2026/2027
Question:
1. Malicious Software, or malware
Answer:
Is software designed to infiltrate a computer system and possibly damage it without the user's
knowledge or consent.
Question:
2. Malware
Answer:
broad term used by computer professionals to include viruses, worms, Trojan horses, spyware,
rootkits, adware, and other types of undesirable software.
Question:
3. Virus
Answer:
Code that runs on a computer without user's knowledge; it infects the computer when the code is
accessed and executed. Example: Love Bug Virus (love-letter-for-you. txt.vbs
Question:
4. Worm
Answer:
Similar to viruses except that it self replicates, whereas a virus does not. Example:
Nimda (Propagated through network shares and mass e-mailing.)
Question:
5. Trojan horse
Answer:
Appears to perform desired functions but is actually peforming malicious functions behind the scenes.
Example: (Remote access Trojan Example: Plugx)
Question:
6. Spyware
Answer:
Malicious software either downloaded unwittingly from a website or installed along with some other
third-party software. Example: (Internet Optimizer: aka DyFuCA)
, Question:
7. Rootkit
Answer:
Software designed to gain administrator-level control over a computer system without being detected.
Example: (boot loader rootkits: Evil Maid Attack)
Question:
8. Spam
Answer:
The abuse of electronic messaging systems such as email, broadcast media, and instant messaging.
Example: (Phishing identity theft e-mails: Lottery scam e-mails.
Question:
9. Ransomware
Answer:
Restricts access to a computer system or locks the system until a ransom is paid. Often propagated by
a Trojan. Example: CryptoLocker
Question:
10. Symptoms of malware in a computer
Answer:
sluggish in its response time, it might display unwanted pop-ups and incorrect home pages, or
applications, could lock up or shut down unexpectedly. malware uses CPU and memory resources
directly or behind the scenes, causing the system to run slower than usual.
Question:
11. How to prevent viruses?
Answer:
Every computer should have antivirus (AV) software running on it. Examples:
McAfee and Symantec of AV softwares. Second, The AV software should be updated. Update the AV
engine and the definitions. schedule regular full scans. Make sure the computer has latest updates
available for the OS and apps such as Microsoft Oflce.
Question:
12. Does Antivirus can locate rootkit?
Answer:
No. AV software is important but it is not a cure-all.
Latest update 2026/2027
Question:
1. Malicious Software, or malware
Answer:
Is software designed to infiltrate a computer system and possibly damage it without the user's
knowledge or consent.
Question:
2. Malware
Answer:
broad term used by computer professionals to include viruses, worms, Trojan horses, spyware,
rootkits, adware, and other types of undesirable software.
Question:
3. Virus
Answer:
Code that runs on a computer without user's knowledge; it infects the computer when the code is
accessed and executed. Example: Love Bug Virus (love-letter-for-you. txt.vbs
Question:
4. Worm
Answer:
Similar to viruses except that it self replicates, whereas a virus does not. Example:
Nimda (Propagated through network shares and mass e-mailing.)
Question:
5. Trojan horse
Answer:
Appears to perform desired functions but is actually peforming malicious functions behind the scenes.
Example: (Remote access Trojan Example: Plugx)
Question:
6. Spyware
Answer:
Malicious software either downloaded unwittingly from a website or installed along with some other
third-party software. Example: (Internet Optimizer: aka DyFuCA)
, Question:
7. Rootkit
Answer:
Software designed to gain administrator-level control over a computer system without being detected.
Example: (boot loader rootkits: Evil Maid Attack)
Question:
8. Spam
Answer:
The abuse of electronic messaging systems such as email, broadcast media, and instant messaging.
Example: (Phishing identity theft e-mails: Lottery scam e-mails.
Question:
9. Ransomware
Answer:
Restricts access to a computer system or locks the system until a ransom is paid. Often propagated by
a Trojan. Example: CryptoLocker
Question:
10. Symptoms of malware in a computer
Answer:
sluggish in its response time, it might display unwanted pop-ups and incorrect home pages, or
applications, could lock up or shut down unexpectedly. malware uses CPU and memory resources
directly or behind the scenes, causing the system to run slower than usual.
Question:
11. How to prevent viruses?
Answer:
Every computer should have antivirus (AV) software running on it. Examples:
McAfee and Symantec of AV softwares. Second, The AV software should be updated. Update the AV
engine and the definitions. schedule regular full scans. Make sure the computer has latest updates
available for the OS and apps such as Microsoft Oflce.
Question:
12. Does Antivirus can locate rootkit?
Answer:
No. AV software is important but it is not a cure-all.
