Declarations and Access Control Self Test

Question 1

Can variables names begin with #

Answer 1

No

Question 2

Can variable names begin with a currency sign ($ £ €)

Answer 2

Yes

Question 3

If variable in public class in other package is declared protected, how can it be accessed?

Answer 3

Can only be accessed through inheritance ie through extending class and using variable ref, not through class instantiation ref

Question 4

What are interface methods by default? (Private, default, private, protected)

Answer 4

Public

Question 5

What must classes which implement interface methods implement them as?

Answer 5

Public

Question 6

Can visibility be reduced for implemented methods from interfaces?

Answer 6

No, visibility cannot be reduced.

Question 7

Does an interface extend or implement another interface?

Answer 7

Interfaces extend other interfaces

Question 8

Can a non-static method in another class be invoked from a static context?

Answer 8

No, it cannot be invoked.

Method must be declared static.