Java Certified Programmer (1Z0-501) Free Practice Test

Question 1

Which is a method of the MouseMotionListener interface?

A. Public boolean mouseMoved(MouseEvent)

B. Public boolean mouseMoved(MouseMotionEvent)

C. Public boolean MouseMoved(MouseMotionEvent)

D. Public void mouseMoved(MouseMotionEvent)

E. Public void mouseMoved(MouseEvent)

Correct Answer: E

Question 2

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 program executes normally without printing a message.

B. The output is caught exception.

C. The code will not compile.

D. The output is caught IOException.

Correct Answer: C

Question 3

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. (d ==10.0)

B. (b ==c)

C. (a ==b)

D. (a ==c)

E. (b ==d)

F. (d ==e)

Correct Answer: A,D,F

Question 4

Which constructs a BufferedIputStream?

A. New BufferedInputStream("in.txt");

B. New BufferedInputStream(new File("in.txt"));

C. New BufferedInputStream(new Writer("in.txt"));

D. New BufferedInputStream(new FileInputStream("in.txt"));

E. New BufferedInputStream(new InputStream("in.txt"));

F. New BufferedInputStream(new Writer("in.txt"));

Correct Answer: D

Question 5

Which statements about static inner classes are true? (Choose Two)

A. Static members of a static inner class can be referenced using the class name of the static innerclass.

B. A static inner class has no reference to an instance of the enclosing class.

C. A static inner class has access to the non-static members of the outer class.

D. A static inner class requires a static initializer.

E. A static inner class requires an instance of the enclosing class.

Correct Answer: A,B

Question 6

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 "A,B".

B. The code does not compile because "+" cannot be overloaded for StringBuffer.

C. The code compiles and prints "AB,B".

D. The code compiles and prints "A,A".

E. The code compiles and prints "B,B".

F. The code compiles and prints "AB,AB".

Correct Answer: C

Question 7

Given:
1 . public class ArrayTest {
2 . public static void main (String[]args){
3 . float f1[], f2[];
4 . f1 = new float [10];
5 . f2 = f1;
6 . System.out.printIn ("f2[0]=" + f2[0]);
7 .}
8 .}
What is the result?

A. An error at line 5 causes compile to fail.

B. It prints f2[0] = 0.0

C. An error at line 6 causes compile to fail.

D. An error at line 6 causes an exception at runtime.

E. It prints f2[0] = NaN

Correct Answer: B

Question 8

Which can be used to encode charS for output?

A. Java.io.OutputStream.

B. Java.io.BufferedOutputStream.

C. Java.io.EncodeOutputStream.

D. Java.io.OutputStreamWriter.

E. Java.io.EncodeWriter.

Correct Answer: D

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Oracle Java Certified Programmer (1Z0-501) Free Practice Test