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Java OOP
SHORT
ANSWER QUESTIONS DATA
ENCAPSULATION
QUESTIONS
a)
_____________
_____________ is the process of limiting access to instance variables to
ensure data integrity. This is done by
making these variables private and providing limited access via instance
methods. b)
The
keywords ___________ and ____________ are called access modifiers. They dictate the locations from where variables
and methods can be accessed. There is
also a protected access modifier
that relates to inheritance as well as a default access modifier (no
modifier) that can be used. c)
We
can make an instance variable ___________ to stop direct access to it from
outside the class. This could allow us
to control what values it get. d)
True
or false. A private instance variable
is the same as a public instance variable from inside the class (so inside
constructors and instance methods).
____________ e)
For
Point p, if we can access p.x, then we know that x is a ____________ instance
variable. f)
True
or false. Instance methods have access
to the instance variables, even if they are private. ___________ g)
A
__________ ___________ is an instance method that returns the value of an
instance variable. h)
A
__________ ___________ in an instance method that changes the value of an
instance variable. i)
A
class that does not allow the user to change its instance variables once an
object is created is said to be ________________. An example of such a class is the String
class. j)
A
class that allows the user to make changes to its instance variables is said
to be _______________. SOLUTIONS Click here.
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