Which virus is activated in response to a specific event, such as launching an application or a specific date/time?

• A. Time bombs
• B. Web scripting virus
• C. Logic bomb
• D. Metamorphic viruses

Answer: (C)

Activation by a condition defines this concept. A logic bomb sits quietly until a specific event or condition occurs—like launching an application, opening a particular file, or reaching a certain date or time—and then the malicious payload unfolds. The scenario mentions an event such as starting software or a date/time trigger, which fits the idea of a logic bomb perfectly. Time bombs are a specific kind of logic bomb that activates at a set date or time, so they’re actually a special case of the same broader principle. Metamorphic viruses focus on changing their code to evade detection, not on waiting for a trigger condition. Web scripting viruses are delivered and executed via web scripts, not inherently about triggering on an internal event like app launch. So the best fit for an event-triggered activation is the logic bomb.