最新的Oracle 1Z0-501免費考試真題

問題1

Exhibit:
1 . public class Test {
2 . public static void replaceJ(string text) {
3 . text.replace ('j', 'l');
4 .}
5 .
6 . public static void main(String args[]){
7 . string text = new String ("java")
8 . replaceJ(text);
9 . system.out.printIn(text);
1 0.}
1 1.}
What is the result?

A. The program prints "java"

B. Compilation succeeds but the program throws an exception.

C. The program prints "lava"

D. An error at line 7 causes compilation to fail.

正確答案: A

問題2

Given:
8 . int index = 1;
9 . boolean[] test = new Boolean[3];
1 0. boolean foo= test [index];
What is the result?

A. Foo has the value of true.

B. The code will not compile.

C. An exception is thrown.

D. Foo has the value of 0.

E. Foo has the value of null.

F. Foo has the value of false.

正確答案: F

問題3

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. private class InnerOne {
public double methoda() {return d1;}
}

B. static class InnerOne {
public double methoda() {return d1;}
}

C. protected class InnerOne {
static double methoda() {return d1;}
}

D. static class InnerOne {
static double methoda() {return d1;}
}

E. public abstract class InnerOne {
public abstract double methoda();
}

正確答案: A,E

問題4

Which two are equivalent? (Choose Two)

A. 16>>2

B. 16*4

C. 16>4

D. 16>>>2

E. 16/2^2

F. 16/2

正確答案: A,E

問題5

CORRECT TEXT
Given
1 . Public class test (
2 .Public static void main (String args[])(
3 .System.out.printIn (6 ^ 3);
4 .)
5 .)
What is the output?

正確答案:

5

問題6

Exhibit:
1 . public class enclosingone (
2 . public class insideone{}
3 . )
4 . public class inertest(
5 . public static void main (string[]args)(
6 . enclosingone eo= new enclosingone ();
7 . //insert code here
8 . )
9 . )
Which statement at line 7 constructs an instance of the inner class?

A. InsideOnew ei= eo.new InsideOn();

B. InsideOne ei = EnclosingOne.new InsideOne();

C. EnclosingOne.InsideOne ei = eo.new InsideOne();

D. Eo.InsideOne ei = eo.new InsideOne();

正確答案: C

問題7

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

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

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

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

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

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

正確答案: F

最新的Oracle Java Certified Programmer - 1Z0-501免費考試真題

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