Free Oracle 1Z0-853 Exam Dumps Questions & Answers

DRAG DROP
Click the Task button.

Correct Answer:

Click the Exhibit button.
Which statement is true about the classes and interfaces in the exhibit?

• A.  Compilation will succeed for all classes and interfaces.
• B.  Compilation of class C will fail because of an error in line 6.
• C.  Compilation of class C will fail because of an error in line 2.
• D.  Compilation of class AImpl will fail because of an error in line 2.

Given:
10.
interface A { public int getValue(); }
11.
class B implements A {
12.
public int getValue() { return 1; }
13.
}
14.
class C extends B {
15.
// insert code here
16.
}
Which three code fragments, inserted individually at line 15, make use of polymorphism? (Choose three.)

• A.  public void add(A a) { a.getValue(); }
• B.  public void add(A a, B b) { a.getValue(); }
• C.  public void add(B b) { b.getValue(); }
• D.  public void add(C c) { c.getValue(); }
• E.  public void add(C c1, C c2) { c1.getValue(); }

Given:
11.
static void test() throws Error {
12.
if (true) throw new AssertionError();
13.
System.out.print("test ");
14.
}
15.
public static void main(String[] args) {
16.
try { test(); }
17.
catch (Exception ex) { System.out.print("exception "); }
18.
System.out.print("end ");
19.
}
What is the result?

• A.  An Exception is thrown by main.
• B.  A Throwable is thrown by main.
• C.  exception end
• D.  exception test end
• E.  end
• F.  Compilation fails.

Given:
1.public class Target {
2.private int i = 0;
3.public int addOne(){
4.return ++i;
5.}
6.} And:
1.public class Client {
2.public static void main(String[] args){
3.System.out.println(new Target().addOne());
4.}
5.}
Which change can you make to Target without affecting Client?

• A.  Line 4 of class Target can be changed to return i++;
• B.  Line 2 of class Target can be changed to private int i = 1;
• C.  Line 3 of class Target can be changed to private int addOne(){
• D.  Line 2 of class Target can be changed to private Integer i = 0;