--%>

Explain Upcast

Upcast: It is a cast towards an object's ultimate super type - which is, `up' the inheritance hierarchy towards the Object class, for example:

        // Upcast from VariableController to HeaterController
        VariableController v;
        ...
        HeaterController c = v;

   Related Questions in Programming Languages

  • Q : How XML web services integrate two

    How can XML web services integrate two legacy distributed systems, one based on Corba and one based on Java RMI?

  • Q : Define the term non-XML resource Define

    Define the term non-XML resource?

  • Q : Implementation of XML Web Services

    Explain the implementation of XML Web Services to be found in .NET. In particular, explain the role of the wsdl.exe tool.

  • Q : What is decimal Decimal: The number

    Decimal: The number representation in decimal is base 10. In base 10, the digits 0 to 9 are utilized. Digit positions symbolize successive powers of 10.

  • Q : Program is prone to deadlock when

      Give a brief introduction about the operation of your program and show that you understand the idea behind threads and mutual exclusion variable. Why do we need to use mutual exclusion to control the access of the three global variables? What is the potential p

  • Q : Double clock signal in synchronous

    Describes the cases where you need to double clock a signal before presenting this to a synchronous state machine?

  • Q : What is Client Client : It is a user of

    Client: It is a user of a service. The Web client requests resources from Web server, for example: Whenever the client is an object then this is the sender of messages to its object servers.

  • Q : What is Protected access Protected

    Protected access: Protected access is accessible to a class member prefixed with protected access modifier. This member is accessible to all classes stated within the enclosing package, and any sub-classes expanding the enclosing class.

  • Q : Write a program that prints out all

    Write a program that prints out all prime numbers between 1 and 1000. Print the values out ten per line, with digits lined in proper columns.

  • Q : Define Double buffering Double

    Double buffering: A graphics method employed to smooth animation. The later version of an image is drawn `at the back the scenes' and then exhibited in its totality whenever the drawing is finished. The supposition is that it will be relatively fast t