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CS180 REVISION STUDY EXAM QUESTIONS AND ANSWERS UNIVERSITY OF CALIFORNIA
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CS180 REVISION STUDY EXAM QUESTIONS AND ANSWERS UNIVERSITY OF CALIFORNIA
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CS180 REVISION STUDY EXAM QUESTIONSAND ANSWERS UNIVERSITY OF CALIFORNIA
What does the following UML diagram entry mean?
+ setHeight (h : double) : void
a) a public method with a parameter of data type double that does not
return a value
b) a private field called setHeight that is a double data type
c) a private method with no parameters that returns a double data type
d) public field called setHeight that is a double data type
Verified Answer -a public method with a parameter of data type double
that does not return a value
A class specifies the ____ and ____ for a particular type of object.
a) relationships, ,methods
b) fields, object names
c) fields, methods
d) relationships, object names
Verified Answer -fields, methods
It is common practice in object-oriented programming to make all of a
class's ____.
a) fields private
b) methods private
c) fields public
,d) fields and methods public
Verified Answer -fields private
For the following code, which statement is not true?
public class Sphere
{
private double radius;
public double x;
private double y;
private double z;
}
a) The z field is available to code written outside the Sphere class.
b) The radius field is not available to code written outside the Sphere class.
c) The radius, x, y, and z fields are members of the Sphere class.
d) The x field is available to code that is written outside the Sphere class.
Verified Answer -The z field is available to code written outside the Sphere
class.
One or more objects may be created from a(n) ____.
a) field
b) method
c) instance
d) class
Verified Answer -class
, You should not store calculated data, such as a Rectangle object's area, in
a field because it is dependent on the current data stored in other fields.
Instead, it should be recalculated each time this data is needed to avoid
____.
a) confusion
b) redundancy
c) stale data
d) none of these
Verified Answer -stale data
When a primitive type variable is passed as an argument to a method,
what is passed into the receiving method's parameter variable?
a) a copy of the value stored in the variable
b) the object's memory address
c) neither of these
d) both of these
Verified Answer -a copy of the value stored in the variable
When an object type variable is passed as an argument to a method, what
is passed into the receiving method's parameter variable?
a) a copy of the value stored in the variable
b) the object's memory address
c) neither of these
d) both of these
Verified Answer -the object's memory address
Data hiding means that critical data stored inside the object is protected
from code outside the object. This is accomplished in Java by ____.
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