MCQs > IT & Programming > Antispam And Antivirus MCQs > Basic Antispam and Antivirus MCQs

Basic Antispam and Antivirus MCQ

1. One of the first software security applications is ____ software.

Answer

Correct Answer: Antivirus

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2. Av software on a computer must have its ____ files regularly updated by downloads from the internet

Answer

Correct Answer: Signature

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3. Which of the following are malicious code attacks?

Answer

Correct Answer: Trojan horses
Viruses
Malware

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4. Which of the following is used to control zombies?

Answer

Correct Answer: Trojan horses

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5. Which of the following actions can be taken while filtering POP3 spam traffic?

Answer

Correct Answer: Tag the spam mail

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6. What is the function of MTA(Mail Transfer Agent)?

Answer

Correct Answer: It receives and delivers the messages

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7. Which of the following techniques are used to identify spam mails?

Answer

Correct Answer: All of the above

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8. Which of the following protocols is used on the sender side when an electronic mail is sent from one host to another?

Answer

Correct Answer: SMTP

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9. Which of the following is used to entangle spammers?

Answer

Correct Answer: Honey pots

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10. Which of the following is an asymmetric algorithm?

Answer

Correct Answer: El Gamal

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11. Which of the following resembles the Joe Job attack?

Answer

Correct Answer: A spam attack that uses spoofed sender data and tarnishes the apparent sender's reputation

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12. Which of the following is used in a Directory Harvest Attack?

Answer

Correct Answer: Brute Force

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13. Which of the following are different types of spam filtering methods?

Answer

Correct Answer: All of the above

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14. Which of the following programs is used by a user to send and receive emails?

Answer

Correct Answer: Mail User Agent

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15. Dave is fetching mails from a server lying at a remote location. Which protocol is he using to fetch the mails?

Answer

Correct Answer: POP3

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16. What does "RBL" stands for in Email Security?

Answer

Correct Answer: Realtime Blackhole List

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17. Which of the following are the benefits reaped from spam by those associated with antispam measures?

Answer

Correct Answer: All of the above

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18. Which of the following are indirect harms caused by spam?

Answer

Correct Answer: All of the above

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19. How many antivirus programs should be installed on a single system?

Answer

Correct Answer: 1

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20. Which of the following are the disadvantages of verification?

Answer

Correct Answer: All of the above

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21. Which of the following symmetric encryption algorithms is/are supported by S/MIME?

Answer

Correct Answer: DES
3DES

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22. Which of the following are threats to Email Security?

Answer

Correct Answer: All of the above

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23. What is IMAP?

Answer

Correct Answer: Internet Message Access Protocol

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24. What is the function of the Reverse DNS Look up Technique in identifying spam mails?

Answer

Correct Answer: To check the sender's email server attempting for spoofing

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25. Which of the following are different categories of viruses?

Answer

Correct Answer: All of the above

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26. Which of the following measures should be taken to tackle spam mails?

Answer

Correct Answer: All of the above

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27. What is Mail Exchanger(MX) Record?

Answer

Correct Answer: Record in DNS specifying the internet email route.

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28. Which of the following symmetric algorithms have variable key length?

Answer

Correct Answer: Rivest Cipher 4

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29. Which of the following are Email Security Protocols?

Answer

Correct Answer: S/MIME
PEM

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30. Which key is used to decrypt the message in PKI?

Answer

Correct Answer: Private Key.

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31. Which of the following is the Hashing Algorithm?

Answer

Correct Answer: MD5

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32. What is Phishing?

Answer

Correct Answer: Fraudulently acquiring sensitive information.

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33. Suppose you got a mail from the HSBC bank asking you to give your online bank account details. Under which of the spam mail categories does this mail?

Answer

Correct Answer: Brand spoofing.

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34. Which of the following programs establishes modem connection with pay-per-visit resources?

Answer

Correct Answer: Automatic dialers

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35. How many keys are required if two parties communicate using Asymmetric Cryptography?

Answer

Correct Answer: Four

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36. What are zombies?

Answer

Correct Answer: Remotely controlled hosts.

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37. Which of the following ports is used by IMAP?

Answer

Correct Answer: 143

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38. Daniel has deployed an antispam solution in his network. If a spam SMTP is accepted, it is called:

Answer

Correct Answer: False negative

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39. Which of the following are categories of spam mails?

Answer

Correct Answer: All of the above

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40. Which of the following are the ways through which virus spreads?

Answer

Correct Answer: All of the above

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41. Which of the following are disadvantages of the Symmetric Key Cryptography?

Answer

Correct Answer: Nonrepudiation
Security

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42. What is the maximum key length of AES?

Answer

Correct Answer: 256

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43. To which of the following components does the MUA(Mail User Agent) forward the mail while sending it to another host in the e-mail flow?

Answer

Correct Answer: Mail Transfer Agent

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44. What is botnet?

Answer

Correct Answer: A software that runs automatically and autonomously.

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45. Suppose you got a mail from someone saying that you have won a $1 billion and asking you to give him/her $4000 to claim your prize. Under which category does this type of spam mail lie?

Answer

Correct Answer: Phishing and Fraud

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46. Which of the following is the Symmetric Algorithm used in cryptography?

Answer

Correct Answer: IDEA

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47. Which of the following types of virus lives in the boot sector?

Answer

Correct Answer: Bootstrap sector

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48. Which of the following techniques helps in cases of address forgery?

Answer

Correct Answer: Path authentication

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49. Which of the following techniques are used by spammers to find valid/existent email addresses?

Answer

Correct Answer: Directory Harvest Attack

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50. Which of the following are famous worm attacks?

Answer

Correct Answer: All of the above

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51. Which of the following antispam measures are taken to reduce spam?

Answer

Correct Answer: All of the above

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52. What is S/MIME?

Answer

Correct Answer: Secure Multipurpose Internet Mail Extensions

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53. How many keys are required if two parties communicate using Symmetric Cryptography?

Answer

Correct Answer: One

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54. Which of the following files are mostly infected?

Answer

Correct Answer: .EXE
.COM

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55. Which of the following actions can be taken while filtering SMTP spam traffic?

Answer

Correct Answer: Delete the spam mail
Redirect it to the spam mail box
Tag the spam mail

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56.

Which of the following are direct harms caused by spam?

Answer

Correct Answer: MD5

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57. In order to help prevent spam, a tarpit performs which of the following functions?

Answer

Correct Answer: delivers suspected spam messages more slowly

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58. When using greylist filtering, a message will be considered legitimate if it does which of the following?

Answer

Correct Answer: sends its message more than once

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59. Which is not an example of a real life virus or worm discovered during the time period of 1980 to 2013?

Answer

Correct Answer: iRiot

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60. Which of the following sites use disposable email addressing?

Answer

Correct Answer: Craigslist

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61. Polymorphic viruses randomly generate which of the following items before infecting a new file?

Answer

Correct Answer: mutation engine

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62. Which of the following is true of a trojan virus?

Answer

Correct Answer: a Trojan doesn't self-replicate

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63. A virus can hide itself from an antivirus software by doing which of the following?

Answer

Correct Answer: intercepting operating system read and write requests

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64. Which of the following best describes a distributed antivirus tool that consist of a scanning client and a corresponding web service?

Answer

Correct Answer: Cloud Antivirus

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65. Most spyware is used to...

Answer

Correct Answer: track a user's movement on the web or display pop-up ads

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66. Which of the following differentiates a virus from a worm?

Answer

Correct Answer: a virus requires user interaction to infect a machine

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67. What is the difference between a worm and virus?

Answer

Correct Answer: Unlike a virus, a worm does not need to attach itself to a program to spread.

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68. On a WordPress site, which is the default service/tool to prevent spammers from posting comments?

Answer

Correct Answer: Akismet

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69. Which of the following spam filtering techniques statistically analyzes mail?

Answer

Correct Answer: Bayesian Filtering

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70. Firewalls help to prevent which of the following malware from propagating?

Answer

Correct Answer: Worms

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71. Is commercial SPAM legal in the United States?

Answer

Correct Answer: Yes, but only if it follows the standards listed in the CAN-SPAM Act of 2003

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72. Which of the following characteristics classify a mail message as spam?

Answer

Correct Answer: it is unsolicited and indiscriminately addressed

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73. Which of the following is true of macro viruses?

Answer

Correct Answer: They depend on applications to propagate

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74. In a compromised system, which of the following provides the safest way to analyze it?

Answer

Correct Answer: Live CD/DVD

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75. Which of the following can prevent virus infections?

Answer

Correct Answer: Patching programs and the operating system

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76. Antivirus signatures are constructed using with of the following?

Answer

Correct Answer: Hashes

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77. How can delivering mail as text instead of html help prevent spam?

Answer

Correct Answer: text mail prevents web bugs from alerting spammer that the message was opened

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78. What is email spoofing?

Answer

Correct Answer: When someone forges or makes it appear that a email being sent is from a particular sender when it really is being sent by someone else.

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79. Which of the following reduces spam by rejecting mail from a specific ip addresses?

Answer

Correct Answer: DNS Blacklisting

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80. Which of the following tools would NOT be useful in figuring out what spyware or viruses could be installed on a client's computer?

Answer

Correct Answer: WireShark

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81. Performing outbound spam filtering does which of the following for an organization?

Answer

Correct Answer: helps prevent blacklisting

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82. Which type of analysis is an antivirus program performing when it observes a file's activities in a sandbox or decompiles a file and analyzes its instructions?

Answer

Correct Answer: Heuristic Analysis

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83. In order to help prevent spam, a honeypot performs which of the following functions?

Answer

Correct Answer: acts as a desirable mail server in order to lure spammers

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84. Antivirus programs hash files on a computer in order to detect which of the following activities?

Answer

Correct Answer: File content changes

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85. What is CryptoLocker?

Answer

Correct Answer: A type of ransomware which encrypts user files and demands payment for the decryption key.

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86. Which of the following techniques requires posting an email address where only spammers would find it?

Answer

Correct Answer: Spam Traps

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87. Which of the following spam filtering techniques has the highest potential for generating false positives?

Answer

Correct Answer: Keyword Filtering

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88. When a spammer forges the sender's address and enters an invalid receiver, which of the following settings will cause the receiving mail server to create backscatter?

Answer

Correct Answer: Bounce messages

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89. Which is not an example of an anti-spyware tool?

Answer

Correct Answer: Kazaa

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90. Which is most likely something that could be considered strange account activity and may require further scrutiny on an e-commerce site?

Answer

Correct Answer: Orders from several user accounts are being sent to the same physical address

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91. Why are disposable email addresses useful?

Answer

Correct Answer: It is useful for someone who needs to give out their email or sign up to a website, but wants to protect their real email address from SPAM.

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92. What is ransomware?

Answer

Correct Answer: A software that hijacks your computer and asks you to pay in order for it to be removed

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93. You have been told by several of your friends you have recently sent SPAM emails to them, what could be the cause of this and what should you do?

Answer

Correct Answer: A spammer or bot may have gained access to your email account and sent out SPAM to all of your contacts. You should change your password immediately.

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94. Which of the following spam filtering issues stops valid messages from being delivered?

Answer

Correct Answer: false positives

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95. Virus infection via email attachments can be minimized using which of the following?

Answer

Correct Answer: Deleting mail containing attachments from unknown senders

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96. What is a backdoor?

Answer

Correct Answer: A vulnerability in software that allows someone to bypass the normal authentication process

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97. What is a botnet?

Answer

Correct Answer: A collection of computers working together to perform a single task. These computers are often penetrated by software containing malware.

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98. What is the main difference between spyware and other malware?

Answer

Correct Answer: Spyware tends to steal or monitor data and/or personal information while malware encompasses all software that may been made with malicious intent in mind

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99. Which of the following sites provide services for users to setup disposable emails?

Answer

Correct Answer: jetable.org

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100. What is an example of a captcha?

Answer

Correct Answer: All of these

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101. A client asks you to fix his computer because it has ransomware on it. He says he sees a message as soon as he loads windows, and cannot do anything else. What is the best way to fix this computer without losing any of his data?

Answer

Correct Answer: Boot from a USB drive and run a program to remove the malware

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102. What is an example of a "419" Scam

Answer

Correct Answer: A con in which someone asks you for assistance in retrieving a vast sum of money. Often it involves you helping him or her pay off certain fees and in return they promise to share the money with you.

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103. Which of these techniques would be effective in helping to prevent phishing attacks by scammers?

Answer

Correct Answer: Scan for and fix XSS issues

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104. Why shouldn't a user click unsubscribe links from spam messages?

Answer

Correct Answer: the click may validate the email address

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105. A virus can spread to another computer by

Answer

Correct Answer: Sharing an infected file with another computer

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106. How can you help stop spam?

Answer

Correct Answer: All of these

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107. In order to infect a system, clicking an email attachment must cause which of the following conditions to occur?

Answer

Correct Answer: the attachment executes

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108. What is a captcha?

Answer

Correct Answer: It is a tool websites often use to prevent automated spammer bots from posting or registering on a website by forcing the user to do a task, often entering in letters or numbers based on a picture or audio, which verifies that they are human.

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109. What are types of malware?

Answer

Correct Answer: All of these

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110. Which of the following is not a well known anti-virus program?

Answer

Correct Answer: SMAG

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111. Malware is short for

Answer

Correct Answer: Malicious Software

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112. What is a good method for a website owner to confirm a user is not using an account for a spamming purposes?

Answer

Correct Answer: All of these

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113. What could be a good indicator of a Spam email?

Answer

Correct Answer: All of these

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114. What is an example of a Phishing scam?

Answer

Correct Answer: An email that appears to be legitimate, but is really being used to obtain personal or important information

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115. Which of these is an example of a possible victim in a phishing attack?

Answer

Correct Answer: All of these

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116. What is a computer virus?

Answer

Correct Answer: A type of malware that replicates itself and spreads to other files and/or computers.

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117. What run command can you use to check what programs load on startup?

Answer

Correct Answer: msconfig

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118. Automated spamming tools subscribe to mail lists in order to complete which of the following tasks?

Answer

Correct Answer: collect email addresses

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119. If you cannot delete malware infected file, what is good method to try first?

Answer

Correct Answer: Boot in Windows safe mode and attempt to delete the file

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120. In order for antivirus programs to be most effective, it is necessary to keep which of the following up to date?

Answer

Correct Answer: Virus definition files

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121. What is a keylogger?

Answer

Correct Answer: Software that records keystrokes made on a keyboard

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122. A virus is a program that attaches itself to (or replaces the contents of) which of the following file types?

Answer

Correct Answer: Executables

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123. What is rogue security software?

Answer

Correct Answer: A fraudulent security program that appears to be helpful, but is actually not. It may deceive or mislead users into paying money to remove fake viruses or introduce malware after it is installed.

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124. What is disposable email addressing?

Answer

Correct Answer: A practice in which you set a unique email address for sender/recipient communication. Disposable email addresses typically forward to one or more real email mailboxes where the owner can receive and read messages without revealing their true email.

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125. Where might a spammer get your personal information from?

Answer

Correct Answer: All of these

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