A PHP function that calls itself is known as a _________ function.

When you click through to the end of a presentation, ________ displays

A) a black slide B) a white screen C) an End message D) the Microsoft logo

Identify three hazards that may arise in this system. For each hazard, suggest a defensive requirement that will reduce the probability that these hazards will result in an accident. Explain why your suggested defense is likely to reduce the risk associated with the hazard.

A safety-critical software system for treating cancer patients has two main components: • A radiation therapy machine that delivers controlled doses of radiation to tumor sites. This machine is controlled by an embedded software system. • A treatment database that includes details of the treatment given to each patient. Treatment requirements are entered in this database and are automatically downloaded to the radiation therapy machine.