In the tree diagram in the accompanying figure, the root element is the _____ element.

?Which of the following is NOT a popular vendor of firewall software?

A. ?Red Hat B. ?Check Point C. ?Kaspersky D. ?Total Defense 

Which of the following is correct regarding presence and behavior of constructor is correct. Assume that the class name is C.

a) To use the declaration, C x; requires a default constructor must be present. b) To invoke the default constructor, the syntax must be C x(); c) A constructor is called automatically when you declare an object of class type, but any constructor can be called after declaration to set all the member variables to a known state. d) An explicit call to a constructor creates an anonymous object, which can be assigned. e) In spite of the fact that a constructor appears to be a member function, a constructor may not be called as if it were a member function