Oracle Java Certified Programmer - 1Z0-501 FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

Exhibit:
1 . class super {
2 .public int getLength(){return 4;}
3 .}
4 .
5 . public class Sub extends Super {
6 .public long getLength() {return 5;}
7 .
8 . public static void main (String[]args){
9 .super sooper = new Super ();
1 0. Sub sub = new Sub();
1 1. System.out.printIn(
1 2.sooper.getLength()+ "," + sub.getLength()};
1 3.}
1 4. }
What is the output?

A. 5, 4 B. The code will not compile. C. 4, 5 D. 4, 4 E. 5, 5

Discussion 0

Correct Answer: B Vote an answer

Question 2

Which can be used to encode charS for output?

A. Java.io.EncodeWriter. B. Java.io.EncodeOutputStream. C. Java.io.BufferedOutputStream. D. Java.io.OutputStreamWriter. E. Java.io.OutputStream.

Discussion 0

Correct Answer: D Vote an answer

Question 3

Given:
1 . package foo;
2 .
3 . public class Outer (
4 .public static class Inner (
5 .)
6 . )
Which statement is true?

A. An instance of the Inner class can be constructed with "new Outer.Inner ()" B. An instance of the inner class can only be constructed from within the outer class. C. From within the package bar, an instance of the inner class can be constructed with
"new inner()" D. An instance of the inner class cannot be constructed outside of package foo.

Discussion 0

Correct Answer: A Vote an answer

Question 4

Which method in the Thread class is used to create and launch a new thread of execution?

A. Start(); B. Start(Runnable r); C. Execute(Thread t); D. Run(); E. Run(Runnable r); F. Execute();

Discussion 0

Correct Answer: A Vote an answer

Question 5

Which constructs a DataOutputStream?

A. New dataOutputStream(new FileOutputStream("out.txt")); B. New dataOutputStream(new writer("out.txt")); C. New dataOutputStream(new FileWriter("out.txt")); D. New dataOutputStream(new OutputStream("out.txt")); E. New dataOutputStream("out.txt"); F. New dataOutputStream(new file("out.txt"));

Discussion 0

Correct Answer: A Vote an answer

Question 6

Given:
1 . abstract class abstrctIt {
2 . abstract float getFloat ();
3 . )
4 . public class AbstractTest extends AbstractIt {
5 . private float f1= 1.0f;
6 . private float getFloat () {return f1;}
7 . }
What is the result?

A. An error at line 6 causes compilation to fail. B. An error on line 6 causes a runtime failure. C. Compilation is successful. D. An error at line 2 causes compilation to fail.

Discussion 0

Correct Answer: A Vote an answer

Question 7

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. (b ==d) B. (b ==c) C. (d ==10.0) D. (a ==b) E. (d ==e) F. (a ==c)

Discussion 0

Correct Answer: C,E,F Vote an answer