Java Interview Questions and Answers PDF Free Download : Set No. 1

Java Interview Questions And Answers Pdf For Freshers | Experienced Set No. 1
Core Java Interview Questions PDF

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SCJP DUMPS 2012 2013 |OCJP DUMPS::Collections And Generics Q.1

OCJP DUMPS | SCJP DUMPS 2012 :
                 COLLECTIONS And GENERICS Dumps :

Question NO..1

Given:

import java.util.*;
public class Group extends HashSet<Person> {
public static void main(String[] args) {
Group g = new Group();
g.add(new Person("Hans"));
g.add(new Person("Lotte"));
g.add(new Person("Jane"));
g.add(new Person("Hans"));
g.add(new Person("Jane"));
System.out.println("Total: " + g.size());
}
public boolean add(Object o) {
System.out.println("Adding: " + o);
return super.add(o);
}}
class Person {
private final String name;
public Person(String name) { this.name = name; }
public String toString() { return name; }
}
Which of the following occur at least once when the code is compiled and run?
(Choose all that apply.)
A. Adding Hans
C. Adding Jane
E. Total: 5
B. Adding Lotte
D. Total: 3
F. The code does not compile.
G. An exception is thrown at runtime.



   Check Answer:              F

F is correct. The problem here is in Group's add() method—it should have been
add(Person), since the class extends HashSet<Person>. So this doesn't compile.
Pop Quiz: What would happen if you fixed this code, changing add(Object) to
add(Person)? Try running the code to see if the results match what you thought.
-> A, B, C, D, E, and G are incorrect based on the above.



Related Questions::

1. Scjp Ocjp dumps 2012: Question no 1.
2. Scjp Ocjp Dumps : Question no. 2
3 .SCJP certification dumps |Ocjp dumps| Ocjp 1.6 dumps.

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SET NO .1 QUESTION NO. 3: OCJP 1.6 DUMPS,SCJP DUMPS

OCJP DUMPS|SCJP DUMPS|SCJP(OCJP) 1.6 CERTIFICATION QUESTIONS

Given:

11.  public interface Status {

12.  /* insert code here */ int MY_VALUE = 10;

13.      }

Which three are valid on line 12? (Choose three.)

A.  final

B.  static

C.  native

D.  public

E.  private

F.  abstract

G.    protected 

ANSWER IS:>       ABD

Previous Articles:

1. Question no. 2 Set no. 1: ocjp|scjp 1.6 and 1.7 dumps

2. Question no. 1 Set no. 1: ocjp|scjp 1.6 and 1.7 dumps

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Question 2

Given:

10. public class Bar {
11.static void foo(int...x) {
12. // insert code here
13. }
14. }
Which two code fragments, inserted independently at line 12, will allow
the class to compile? (Choose two.)
A. foreach(x) System.out.println(z);
B. for(int z : x) System.out.println(z);
C. while( x.hasNext()) System.out.println( x.next());
D. for( int i=0; i< x.length; i++ ) System.out.println(x[i]);


Check your Answer: BD

SCJP | OCJP 1.6 DUMPS | JAVA CERTIFICATION QUESTIONS | SCJP QUESTIONS

1 Q.    What is the Result Of this Program.

public class LoadData {
2. public static void main(String[] args) {
3. Object dt1 = new Object();
4. double pay[] = new double[10];
5. double rcv[][] = new double[1][10];
6. pay[0] = 1.0;
7. pay[1] = 2.0;
8. pay[2] = 3.0;
9. pay[3] = 4.0;
10. pay[4] = 5.0;
11. pay[5] = 6.0;
12. pay[6] = 7.0;
13. pay[7] = 8.0;
14. pay[8] = 9.0;
15. pay[9] = 10.0;
16. dt1 = pay;
17. rcv = dt1;
18. System.out.println(rcv[1][1]);
19. }
20. }

A.
Compilation fails because of an error at line 5.
B
Compilation fails because of an error at line 16.
C
Compilation fails because of an error at line 17.
D
Compilation succeeds and the program prints "1.0".
E
Compilation succeeds and the program prints "2.0".
F
Compilation succeeds and the program prints the reference location for pay.

                                Check  Answer Is : C