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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

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

2. Given:
1 . public class test(
2 . public static void main(string[]args){
3 . string foo = args [1];
4 . string foo = args [2];
5 . string foo = args [3];
6 . }
7 .}
And command line invocation:
Java Test red green blue
What is the result?

A) Baz has the value of "blue"
B) Baz has the value of ""
C) Baz has the value of "red"
D) Bax has the value of "green"
E) The program throws an exception.
F) Baz has the value of null
G) The code does not compile.

3. Which two create an InputStream and open file the "file.txt" for reading? (Choose Two)

A) FileInputStream in=new FileInputStream(new File("file.txt"));
B) InputStream in=new InputStreamFileReader ("file.txt", "read");
C) InputStream in=new FileReader("file.txt");
D) FileInputStream in=new FileReader(new File("file.txt"));
E) InputStream in=new FileInputStream("file.txt");

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

5. Exhibit:
1 . class A {
2 . public byte getNumber (){
3 .return 1;
4 .}
5 .}
6 .
7 . class B extends A {
8 . public short getNumber() {
9 . return 2;
1 0. }
1 1.
1 2. public static void main (String args[]) {
1 3.B b = new B ();
1 4.System.out.printIn(b.getNumber())
1 5.}
1 6. }
What is the result?

A) An error at line 14 causes compilation to fail.
B) Compilation succeeds and 1 is printed.
C) Compilation succeeds but an exception is thrown at line 14.
D) Compilation succeeds and 2 is printed.
E) An error at line 8 causes compilation to fail.

Solutions: