(15). A variable ceases to exist at the end of the in which it is declared. a. statement b. block c. class d. program (16). You can declare two variables with the same name as long as a. they appear within the same block b. they are assigned different values c. they are of different types d. their scopes do not overlap (17). If a method is written to receive a double argument, and you pass an integer to the method, then the method will a. work correctly; the integer will be promoted to a double b. work correctly, the integer will remain an integer c. execute; but any output will be incorrect d. not work; an error message will be issued (18). Methods with the same name that have identical argument lists but different return types are a. legal b. overloaded c. unstructured d. illegal you are referencing. (19). The this reference specifies which a. method b. object c. class d. program (20). If you change the value of a static variable in a class, it is changed for a. only new objects instantiated after the change b. only objects already in existence before the change c. all objects of the class d. no objects of the class (21). Overloaded methods cannot have the same a. name b. number of arguments c. number and type of arguments d. return type