The allocation of network numbers based on CIDR has let to the depletion of IP addresses.

In a for statement, the ________ expression is executed only once.

A) initialization B) test C) repeat D) validate E) update

Answer the following questions true (T) or false (F)

1. The type of the variable naming an object determines which method names can be used in an invocation with that calling object. 2. Downcasting should be used only in situations where it makes sense.