#3 cmsc131 review

Question 1

overloading

Answer 1

same name, different signatures in the same class.
Same name, different parameter lists
(determined during compile time)

Question 2

scope

Answer 2

the region of a program where an identifier can be referred to by name
declaration to }

Question 3

characteristics of a static method

Answer 3

no current obj, can be invoked by class name(b/c doesn’t need to be invoked by an object), can be used if there are no objects in the class

Question 4

characteristics of a static field

Answer 4

one copy for the entire class, shared among all objects of the class, can be used in static or non-static methods (NONSTATIC FIELDS CAN ONLY BE USED IN NONSTATIC METHODS!!!!!)

Question 5

4 types of visibility methods

Answer 5

public
protected
package
private
(most to least visible)

Question 6

public vs. private methods

Answer 6

public: functional to users of any class
private: functional to other methods in the same class

Question 7

protect privacy

Answer 7

instead of getters, add methods to a class itself that return info about fields (avoid exposing the actual field outside of the class)

Question 8

when are reference copies safe?

Answer 8

when the object is immutable