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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

1. CORRECT TEXT
Given:
AnInterface is an interface.
AnAdapter0 is a non-abstract, non-final class with a zero argument constructor.
AnAdapter1 is a non-abstract, non-final class without a zero argument constructor, but with a constructor that takes one int argument.
Which two construct an anonymous inner class? (Choose Two)
F.AnAdapter1 aa=new AnAdapter1(){}
G.AnAdapter0 aa=new AnAdapter0(){}
H.AnAdapter0 aa=new AnAdapter0(5){}
I.AnAdapter1 aa=new AnAdapter1(5){}
J.AnInterface a1=new AnInterface(5){}

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

3. Which two statements are reserved words in Java? (Choose Two)

A) Run
B) Import
C) Implement
D) Default

4. Which statement is true?

A) No exceptions are subclasses of Error.
B) Any statement that may throw an Error must be enclosed in a try block.
C) The Error class is a untimeException.
D) Any statement that may thro a runtimeException must be enclosed in a try block.
E) Any statement that may throw an Exception must be enclosed in a try block.

5. Given:
1 . public class SyncTest {
2 . private int x;
3 . private int y;
4 . public synchronized void setX (int i) (x=1;)
5 . public synchronized void setY (int i) (y=1;)
6 . public synchronized void setXY(int 1)(set X(i); setY(i);)
7 . public synchronized Boolean check() (return x !=y;)
8 . )
Under which conditions will check () return true when called from a different class?

A) Check() can never return true.
B) Check() can return true when setXY is called by multiple threads.
C) Check() can return true when multiple threads call setX and setY separately.
D) Check() can only return true if SyncTest is changed to allow x and y to be set separately.

Solutions: