Which of the following is true about Java system properties?
A. Java system properties are accessible by any process
B. Java system properties are accessible by processes they are added to
C. Java system properties are retrieved by System.getenv()
D. Java system properties are set by System.setenv()
Answer: Option B
This Question Belongs to Java Program >> Interfaces And Abstract Classes
A. A contract specifying a set of methods that a class must implement
B. A class that cannot be instantiated
C. A class that contains only static methods
D. A subclass of the Object class
In Java, can a class implement multiple interfaces?
A. Interfaces cannot be implemented by classes
B. Only abstract classes can implement interfaces
C. No, a class can only implement one interface
D. Yes, a class can implement multiple interfaces
What is the purpose of an abstract class in Java?
A. To declare abstract methods
B. To provide a base class with common methods and fields
C. To make a class final
D. To declare abstract methods
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