In object oriented programming, ____________ is used to create an "is a" relationship among classes.

Users have reported issues accessing an Internet website. The network technician wants to verify network layer connectivity. Which of the following tools can provide the verification?

A. ping B. netstat C. route D. arp

A(n) ____ is a class method whose sole purpose is to initialize the class's Private variables.

A. signature B. constructor C. Get block D. event