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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

1. CORRECT TEXT
Given:
1 . String foo = "base";
2 . foo.substring(0,3);
3 . foo.concat("ket");
4 . foo += "ball";
5 . Type the value of foo at line 8.

2. CORRECT TEXT
Exhibit:
1 . Public class test (
2 . Public static void stringReplace (String text)(
3 .Text = text.replace ('j' , 'i');
4 . )
5 .
6 . public static void bufferReplace (StringBuffer text)(
7 .text = text.append ("C")
8 . )
9 .
1 0. public static void main (String args[]} (
1 1.String textString = new String ("java");
1 2.StringBuffer text BufferString = new StringBuffer ("java");
1 3.
1 4.stringReplace (textString);
1 5.BufferReplace (textBuffer);
1 6.
1 7.System.out.printIn (textString + textBuffer);
1 8.}
1 9.)
What is the output?

3. Given:
1 . public class test (
2 . public static void main (String args[]){
3 .int i = 0xFFFFFFF1;
4 .int j = ~i;
5 .
6 .}
7 . )
What is the decimal value of j at line 5?

A) An error at line 4 causes compilation to fail.
B) -15
C) 14
D) An error at line 3 causes compilation to fail.
E) 1
F) 0

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

5. You want subclasses in any package to have access to members of a superclass. Which is the most restrictive access modifier that will accomplish this objective?

A) Transient
B) Protected
C) No access modifier is qualified
D) Public
E) Private

Solutions: