Java Classes and Objects

Java Classes and Objects - Important Points

A. They cannot have constructors.

B. They can be instantiated.

C. They can have both abstract and non-abstract methods.

D. They cannot have any methods implemented.

A. They can have instance variables.

B. They can be instantiated.

C. They can have both abstract and non-abstract methods.

D. They can have constructors.

A. extends

B. implements

C. super

D. this

A. It is the parent class of all other classes in Java.

B. It is an abstract class.

C. It provides default implementations for several methods.

D. All of the above.

A. It should be easy to understand and use.

B. It should have a single responsibility.

C. It should be tightly coupled with other classes.

D. It should be easy to maintain and extend.