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Oracle Java Certified Programmer Sample Questions:

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

2. Exhibit:
1 . public class X {
2 . public static void main (String[]args){
3 . int [] a = new int [1]
4 . modify(a);
5 . System.out.printIn(a[0]);
6 .}
7 .
8 . public static void modify (int[] a){
9 .a[0] ++;
1 0.}
1 1. }
What is the result?

A) The program runs but aborts with an exception.
B) An error "possible undefined variable" at line 9 causes compilation to fail.
C) An error "possible undefined variable" at line 4 causes compilation to fail.
D) The program runs and prints "1"
E) The program runs and prints "0"

3. Exhibit:
1 . import java.io.IOException;
2 . public class ExceptionTest(
3 . public static void main (String[]args)
4 . try (
5 . methodA();
6 .) catch (IOException e)(
7 . system.out.printIn("Caught IOException");
8 .) catch (Exception e)(
9 . system.out.printIn("Caught Exception");
1 0.)
1 1. )
1 2. public void methodA (){
1 3. throw new IOException ();
14.)
15. )
What is the result?

A) The output is caught exception.
B) The code will not compile.
C) The program executes normally without printing a message.
D) The output is caught IOException.

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

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

5. Given:
1. public class OuterClass {
2. private double d1 1.0;
3. //insert code here
4. }
You need to insert an inner class declaration at line2. Which two inner class declarations are valid? (Choose Two)

A) static class InnerOne {
static double methoda() {return d1;}
}
B) protected class InnerOne {
static double methoda() {return d1;}
}
C) static class InnerOne {
public double methoda() {return d1;}
}
D) private class InnerOne {
public double methoda() {return d1;}
}
E) public abstract class InnerOne {
public abstract double methoda();
}

Solutions: