1Z0-501 by Oracle Valid Free Exam Practice Test

Question 1

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

A. Void setVar(float f) {x = f;} B. Protected float setVar() {x=3.0f; return 3.0f; } C. Public void setVar(float f) {x = f;} D. Public final void setVar(float f) {x = f;} E. Public void setVar(int f) {x = f;} F. Public double setVar(float f) {x = f;}

Correct Answer: C,D

Question 2

Exhibit:
1 . class A {
2 . public String toString (){
3 . return "4";
4 .}
5 .}
6 . class B extends A {
7 .8.public String toString (){
8 . return super.toString()+ "3";
9 .}
1 0. }
1 1. public class Test {
1 2. public static void main(String[]args){
1 3.System.out.printIn(new B());
1 4.}
15.}
What is the result?

A. Compilation succeeds and 4 is printed. B. Compilation succeeds but an exception is thrown at line 9. C. Compilation succeeds and 43 is printed. D. An error on line 9 causes compilation to fail. E. An error on line 14 causes compilation to fail.

Correct Answer: C

Question 3

Given:
1. public class Foo {
2 . public static void main (String [] args){
3 .StringBuffer a = new StringBuffer ("A");
4 .StringBuffer b = new StringBuffer ("B");
5 .operate (a,b);
6 .system.out.printIn{a + "," +b};
7 . )
8 . static void operate (StringBuffer x, StringBuffer y){
9 .x.append {y};
1 0.y = x;
1 1.)
1 2.}
What is the result?

A. The code compiles and prints "B,B". B. The code compiles and prints "AB,AB". C. The code compiles and prints "A,A". D. The code does not compile because "+" cannot be overloaded for StringBuffer. E. The code compiles and prints "AB,B". F. The code compiles and prints "A,B".

Correct Answer: E

Question 4

Given the ActionEvent, which method allows you to identify the affected component?

A. GetTargetComponent. B. GetSource. C. GetClass. D. GetTarget. E. GetComponent.

Correct Answer: B

Question 5

Given:
1 . public class Foo {
2 . private int val;
3 . public foo(int v) (val = v;)}
4 . public static void main (String [] args){
5 . Foo a = new Foo (10);
6 . Foo b = new Foo (10);
7 . Foo c = a;
8 . int d = 10;
9 . double e = 10.0;
1 0. }
1 1. }
Which three logical expression evaluate to true? (Choose Three)

A. (a ==c) B. (a ==b) C. (b ==c) D. (d ==10.0) E. (b ==d) F. (d ==e)

Correct Answer: A,D,F

Question 6

Given:
1. //point X
2 . public class foo (
3 . public static void main (String[]args) throws Exception {
4 . java.io.printWriter out = new java.io.PrintWriter (
5 . new java.io.outputStreamWriter (System.out), true;
6 . out.printIn("Hello");
7 . }
8 . }
Which statement at PointX on line 1 allows this code to compile and run?

A. Include java.io.PrintWriter; B. Import java.io.PrintWriter; C. No statement is needed. D. Include java.io.*; E. Import java.io.*;

Correct Answer: C

Oracle Java Certified Programmer - 1Z0-501 Exam Practice Test