JAVA DUMPS 8(SCJP)

QUESTION NO: 39

Which two are valid declarations within an interface definition? (Choose two)

A. void methoda();

B. public double methoda();

C. public final double methoda();

D. static void methoda(double d1);

E. protected void methoda(double d1);

Answer: A, B

 

QUESTION NO: 40

Which two allow the class Thing to be instantiated using new Thing()? (Choose two)

A. public class Thing {

}

B. public class Thing {

public Thing() {}

}

C. public class Thing {

public Thing(void) {}

}

D. public class Thing {

public Thing(String s) {}

}

E. public class Thing {

public void Thing() {}

public Thing(String s) {}

}

Answer: A, B

 

QUESTION NO: 41

Given:

11. Float f = new Float("12");

12. switch (f) {

13. case 12: System.out.printIn("Twelve");

14. case 0: System.out.printIn("Zero");

15. default: System.out.printIn("Default");

16. }

What is the result?

A. Zero

B. Twelve

C. Default

D. Twelve

Zero

Default

E. Compilation fails.

Answer: E

 

QUESTION NO: 42

Given:

1. public class X {

2. public static void main(String [] args) {

3. try {

4. badMethod();

5. System.out.print("A");

6. }

7. catch (Exception ex) {

8. System.out.print("B");

9. }

10. finally {

11. System.out.print("C");

12. }

13. System.out.print("D");

14. }

15. public static void badMethod() {

16. throw new RuntimeException();

17. }

18. }

What is the result?

A. AB

B. BC

C. ABC

D. BCD

E. Compilation fails.

Answer: D

 

QUESTION NO: 43

Given:

1. class TestA {

2. TestB b;

3. TestA() {

4. b = new TestB(this);

5. }

6. }

7. class TestB {

8. TestA a;

9. TestB(TestA a) {

10. this.a = a;

11. }

12. }

13. class TestAll {

14. public static void main (String args[]) {

15. new TestAll().makeThings();

16. // ...code continues on

17. }

18. void makeThings() {

19. TestA test = new TestA();

20. }

21. }

Which two statements are true after line 15, before main completes? (Choose two)

A. Line 15 causes a stack overflow.

B. An exception is thrown at runtime.

C. The object referenced by a is eligible for garbage collection.

D. The object referenced by b is eligible for garbage collection.

E. The object referenced by a is not eligible for garbage collection.

F. The object referenced by b is not eligible for garbage collection.

Answer: C, F