Can a polymorphic reference invoke a method that is only declared at the object’s class level? If “yes”, explain how.
What will be an ideal response?
In general, a polymorphic reference can only be used to invoke methods that are known to the class of the
reference variable. In order to call a method that is declared at the object’s class level, the reference variable must be cast to be
of the object’s type as part of the call.
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Analyze the DBMSs that you are currently using. Determine each system’s compliance with the functions that we would expect to be provided by a DBMS. What type of language does each system provide? What type of architecture does each DBMS use? Check the accessibility and extensibility of the system catalog. Is it possible to export the system catalog to another system?
What will be an ideal response?
What is a JavaBean?
What will be an ideal response?