State whether each of the following is true or false . If false , explain why. a) An import declaration is not required when one class in a package uses another in the same package. b) Variables...

a) An import declaration is not required when one class in a package uses another in the

same package.

b) Variables declared in the body of a particular method are known as instance variables

and can be used in all methods of the class.

c) Primitive-type local variables are initialized by default.

d) Reference-type instance variables are initialized by default to the value null.