a. A class containing abstract methods is called an abstract class. b. Abstract methods should be implemented in the derived class. c. An abstract class cannot have non-abstract methods. d. A class must be qualified as

 package myPackage:                       class First                     {                     /* class body */                    } a. first class is accessible to all classes defined inside or outside my package. b. first class is accessible to classes within my package. c. first

a. “is a kind of” relationship b. “has a” relationship c. “want to be” relationship d. “contains” of relationship Answer: a. “is a kind of” relationship Explanation: Inheritance in java is a type of “IS-A”

a. The operating system periodically deletes all of the java files available on the system b. When all the references to an object are gone, the memory used by the object is automatically reclaim. c.

a. int number(); b. float average[]; c. counter int[]; d. []double marks; Answer: b. float average[]; Explanation: The correct syntax for declaring an array is dataType arrName[size]; Although the size of the array is not

a. Database Service b. Naming and directory service c. Network service d. The Web service Answer: b. Naming and directory service Explanation: The Java Naming and Directory interface is an API that provides naming and directory