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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

Question 1

Which two demonstrate encapsulation of data? (Choose Two)

A. Methods provide for access and modification of data.
B. The access modifier for methods is protected.
C. The access modifier to member data is private.
D. Member data can be modified directly.
E. Member data have no access modifiers.

Question 2

Given:
1. class super {
2. public float getNum() {return 3.0f;}
3 . )
4 .
5 . public class Sub extends Super {
6 .
7 .)
Which method, placed at line 6, will cause a compiler error?

A. Public double getNum (float d) {retrun 4.0f; }
B. Public float getNum(){return 4.0f; }
C. Public void getNum (double d)
{ }
D. Public void getNum () { }

Question 3

Given:
1 . abstract class abstrctIt {
2 . abstract float getFloat ();
3 . )
4 . public class AbstractTest extends AbstractIt {
5 . private float f1= 1.0f;
6 . private float getFloat () {return f1;}
7 . }
What is the result?

A. An error at line 2 causes compilation to fail.
B. Compilation is successful.
C. An error at line 6 causes compilation to fail.
D. An error on line 6 causes a runtime failure.

Question 4

You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability?

A. Java.util.Map.
B. Java.util.StoredMap.
C. Java.util.StoredSet.
D. Java.util.Set.
E. Java.util.List.
F. Java.util.Collection.

Question 5

Given:
1. class BaseClass {
2. Private float x = 1.0f ;
3. protected float getVar ( ) ( return x;)
4. }
5 . class Subclass extends BaseClass (
6 .private float x = 2.0f;
7 .//insert code here
8 . )
Which two are valid examples of method overriding? (Choose Two)

A. Float double getVar ( ) { return x;}
B. Public float getVar (float f ) { return f;}
C. Float getVar ( ) { return x;}
D. Public float getVar ( ) { return x;}
E. Public float getVar ( ) { return x;}

Solutions: