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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

1. Which two construct an OutputSream that appends to the file "file.txt"? (Choose Two)

A) OutputStream out=new FileOutputStream("file.txt", "append");
B) OutputStream out=new FileOutputStream("file.txt");
C) FileOutputStream out=new FileOutputStream(new file("file.txt"));
D) FileOutputStream out=new FileOutputStream("file.txt", true);
E) OutputStream out=new FileOutputStream(new File("file.txt")true);

2. 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) No statement is needed.
C) Import java.io.*;
D) Include java.io.*;
E) Import java.io.PrintWriter;

3. 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.

4. Exhibit:
1 . class super (
2 . public int I = 0;
3 .
4 . public super (string text) (
5 . I = 1
6 .)
7 .)
8 .
9 . public class sub extends super (
1 0. public sub (string text) (
1 1. i= 2
1 2. )
1 3.
1 4. public static void main (straing args[]) (
1 5. sub sub = new sub ("Hello");
1 6. system.out. PrintIn(sub.i);
1 7.)
1 8. )
What is the result?

A) Compilation will succeed and the program will print "1"
B) Compilation will succeed and the program will print "0"
C) Compilation will succeed and the program will print "2"
D) Compilation will fail.

5. Exhibit:
1 . public class test {
2 .public static void add3 (Integer i) }
3 .int val = i.intValue ( );
4 .val += 3;
5 .i = new Integer (val);
6 .}
7 .
8 . public static void main (String args [ ] ){
9 .Integer i = new Integer (0);
1 0.add3 (i);
1 1.system.out.printIn (i.intValue ( ));
1 2.}
1 3.)
What is the result?

A) The program prints "3".
B) Compilation will succeed but an exception will be thrown at line 3.
C) The program prints "0".
D) Compilation will fail.

Solutions: