एक कंप्यूटर वायरस आमतौर पर किसी अन्य वैध प्रोग्राम निष्पादन योग्य (executable) से खुद को जोड़ता है, जिसे कहा जाता है:

Encryption is related to which of the following characteristics of computer viruses used to evade detection by security software?

Which of the following mass-mailing worms had the capability to exploit vulnerabilities in Microsoft email clients to spread itself automatically via the Windows Address Book?