Core Java 4: Access Modifiers & Dependencies

Question 1

Access Modifiers

Answer 1

4: public, default, protected, private

Question 2

public

Answer 2

can be modified by all (class, package, subclass, and world).

Question 3

default

Answer 3

can be modified within the same class or package only.

Question 4

protected

Answer 4

can be modified within the same class, package, or subclass.

Question 5

private

Answer 5

can only be modified within class.

Question 6

Dependency

Answer 6

objects which class relies on in some way

Question 7

Simple dependency

Answer 7

“uses a” relationship: object of another class used as argument/return type of method

Question 8

Association

Answer 8

“has a” relationship: one class has object of another class as attribute

Question 9

Aggregation

Answer 9

“has many” relationship: one class has many instances of another class

Question 10

Composition

Answer 10

“needs a/needs many” relationship: one class has nested class. cannot make instances of nested class without making instance of outer.