SCJP Questions And Answers

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Answer: 5

Question No: 5
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};
10. y = x;
11. )
12. }
What is the result?
A. The code compiles and prints "A,B". B. The code compiles and prints "A,A". C. The code compiles and prints "B,B". D. The code compiles and prints "AB,B". E. The code compiles and prints "AB,AB". F. The code does not compile because "+" cannot be overloaded for StringBuffer.

Answer: D

Question No: 6
Exhibit:
1. Public class test (
2. Public static void stringReplace (String text) (
3. Text = text.replace (`j' , `i');
4. )
5.
6. public static void bufferReplace (StringBuffer text) (
7. text = text.append ("C")
8. )
9.
10. public static void main (String args[]} (