SCJP/OCJP IZO-851 Java Dumps - Nine

Q1. Given:
1. class Exc0 extends Exception { }
2. class Exc1 extends Exc0 { }
3. public class Test {
4. public static void main(String args[]) {
5. try {
6. throw new Exc1();
7. } catch (Exc0 e0) {
8. System.out.println(“Ex0 caught”);
9. } catch (Exception e) {
10. System.out.println(“exception caught”);
11. }
12. }
13. }
What is the result?
A. Ex0 caught
B. exception caught
C. Compilation fails because of an error at line 2.
D. Compilation fails because of an error at line 6.
Answer: A
Q2. Given:
20. public float getSalary(Employee e) {
21. assert validEmployee(e);
22. float sal = lookupSalary(e);
23. assert (sal>0);
24. return sal;
25. }
26. private int getAge(Employee e) {
27. assert validEmployee(e);
28. int age = lookupAge(e);
29. assert (age>0);
30. return age;
31. }
Which line is a violation of appropriate use of the assertion mechanism?
A. line 21
B. line 23
C. line 27
D. line 29
Answer: A
Q3. Given:
1. public class A {
2. void A() {
3. System.out.println(“Class A”);
4. }
5. public static void main(String[] args) {
6. new A();
7. }
8. }
What is the result?
A. Class A
B. Compilation fails.
C. An exception is thrown at line 2.
D. An exception is thrown at line 6.
E. The code executes with no output.
Answer: E
Q4. Given:
1. class Bar { }
1. class Test {
2. Bar doBar() {
3. Bar b = new Bar();
4. return b;
5. }
6. public static void main (String args[]) {
7. Test t = new Test();
8. Bar newBar = t.doBar();
9. System.out.println(“newBar”);
10. newBar = new Bar();
11. System.out.println(“finishing”);
12. }
13. }
At what point is the Bar object, created on line 3, eligible for garbage collection?
A. After line 8.
B. After line 10.
C. After line 4, when doBar() completes.
D. After line 11, when main() completes.
Answer: C
Q5. Given:
1. interface Beta {}
2.
3. class Alpha implements Beta {
4. String testIt() {
5. return “Tested”;
6. }
7. }
8.
9. public class Main1 {
10. static Beta getIt() {
11. return new Alpha();
12. }
13. public static void main( String[] args ) {
14. Beta b = getIt();
15. System.out.println( b.testIt() );
16. }
17. }
What is the result?
A. Tested
B. Compilation fails.
C. The code runs with no output.
D. An exception is thrown at runtime.
Answer: B
Q6. Given:
11. public class Test {
12. public void foo() {
13. assert false;
14. assert false;
15. }
16. public void bar(){
17. while(true){
18. assert false;
19. }
20. assert false;
21. }
22. }
What causes compilation to fail?
A. Line 13
B. Line 14
C. Line 18
D. Line 20
Answer: D
Q7. Which statement is true?
A. Programs will not run out of memory.
B. Objects that will never again be used are eligible for garbage collection.
C. Objects that are referred to by other objects will never be garbage collected.
D. Objects that can be reached from a live thread will never be garbage collected.
E. Objects are garbage collected immediately after the system recognizes they are
eligible.
Answer: D

Q8. In which two cases does the compiler supply a default constructor for class A? (Choose

two)

A. class A {
}
B. class A {
public A() {}
}
C. class A {
public A(int x) {}
}
D. class Z {}
class A extends Z {
void A() {}
}
Answer: A, D
Q9. Given:
1. public class ReturnIt {
2. return Type methodA(byte x, double y) {
3. return (short)x / y * 2;
4. }
5. }
What is the narrowest valid returnType for methodA in line2?
A. int
B. byte
C. long
D. short
E. float
F. double
Answer: F

SCJP/OCJP IZO-851 Java Dumps - Eight

Q1. Given:
1. public abstract class Test {
2. public abstract void methodA();
3.
4. public abstract void methodB()
5. {
6. System.out.println(“Hello”);
7. }
8. }
Which two changes, independently applied, allow this code to compile? (Choose two)
A. Add a method body to methodA.
B. Replace lines 5 – 7 with a semicolon (“;”).
C. Remove the abstract qualifier from the declaration of Test.
D. Remove the abstract qualifier from the declaration of methodA.
E. Remove the abstract qualifier from the declaration of methodB.
Answer: B, E
Q2. Given:
1. public class Test {
2. public static void main(String Args[]) {
3. int i =1, j = 0;
4. switch(i) {
5. case 2: j +=6;
6. case 4: j +=1;
7. default: j +=2;
8. case 0: j +=4;
9. }
10. System.out.printIn(“j =” +j);
11. }
12. }
What is the result?
A. 0
B. 2
C. 4
D. 6
E. 9
F. 13
Answer: D
Q3. Given:
1. class A {
2. }
3. class Alpha {
4. private A myA = new A();
5.
6. void dolt( A a ) {
7. a = null;
8. }
9. void tryIt() {
10. dolt( myA );
11. }
12. }
Which two statements are correct? (Choose two)
A. There are no instanced of A that will become eligible for garbage collection.
B. Explicitly setting myA to null marks that instance to be eligible for garbage collection.
C. Any call on tryIt() causes the private instance of A to be marked for garbage
collection.
D. Private instances of A become eligible for garbage collection when instances of Alpha
become eligible for garbage collection.
Answer: B, D
Q4. Given:
1. class Super {
2. public int i = 0;
3.
4. public Super(String text) {
5. i = 1;
6. }
7. }
8.
9. public class Sub extends Super {
10. public Sub(String text) {
11. i = 2;
12. }
13.
14. public static void main(String args[]) {
15. Sub sub = new Sub(“Hello”);
16. System.out.println(sub.i);
17. }
18. }
What is the result?
A. 0
B. 1
C. 2
D. Compilation fails.
Answer: D
Q5. Given:
11. int i = 1,j = 10;
12. do{
13. if (i>j) {
14. continue;
15. }
16. j--;
17. } while (++i <6);
18. System.out.println(“i = “ +i+” and j = “+j);
What is the result?
A. i = 6 and j = 5
B. i = 5 and j = 5
C. i = 6 and j = 4
D. i = 5 and j = 6
E. i = 6 and j = 6
Answer: D
Q6.  Which fragment is an example of inappropriate use of assertions?
A. assert (!(map.contains(x)));
map.add(x);
B. if (x > 0) {
} else {
assert (x==0);
}
C. public void aMethod(int x) {
assert (x > 0);
}
D. assert (invariantCondition());
return retval;
E. switch (x) {
case 1: break;
case 2: creak;
default: assert (x == 0);
Answer: C
Q7. Given:
1. public class X {
2. public X aMethod() { return this;}
3. }
1. public class Y extends X {
2.
3. }
Which two methods can be added to the definition of class Y? (Choose two)
A. public void aMethod() {}
B. private void aMethod() {}
C. public void aMethod(String s) {}
D. private Y aMethod() { return null; }
E. public X aMethod() { return new Y(); }
Answer: C, E
Q8. 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(“B”);
12. }
13. System.out.print(“D”);
14. }
15. public static void badMethod() {
16. throw new Error();
17. }
18. }
What is the result?
A. ABCD
B. Compilation fails.
C. C is printed before exiting with an error message.
D. BC is printed before exiting with an error message.
E. BCD is printed before exiting with an error message.
Answer: C
Q9. You want subclasses in any package to have access to members of a superclass. Which is
the most restrictive access that accomplishes this objective?
A. public
B. private
C. protected
D. transient
E. default access
Answer: C

SCJP/OCJP IZO-851 Java Dumps - Seven

Q1.Given:
11. switch(x) {
12. default:
13. System.out.printIn(“Hello”);
14. }
Which two are acceptable types for x? (Choose two)
A. byte
B. long
C. char
D. float
E. Short
F. Long
Answer: A, C
Q2. Given:
1. public class X {
2. public static void main(String [] args) {
3. try {
4. badMethod();
5. System.out.print(“A”);
6. }
7. catch (RuntimeException ex) {
8. System.out.print(“B”);
9. }
10. catch (Exception ex1) {
11. System.out.print(“C”);
12. }
13. finally {
14. System.out.print(“D”);
15. }
16. System.out.print(“E”);
17. }
18. public static void badMethod() {
19. throw new RuntimeException();
20. }
21. }
What is the result?
A. BD
B. BCD
C. BDE
D. BCDE
E. ABCDE
F. Compilation fails.
Answer: C
Q3. Given:
1. public class Test {
2. public static void main(String[] args) {
3. int x = 0;
4. assert (x > 0) ? “assertion failed” : “assertion passed”;
5. System.out.println(“Finished”);
6. }
7. }
What is the result?
A. finished
B. Compilation fails.
C. An AssertionError is thrown and finished is output.
D. An AssertionError is thrown with the message “assertion failed”.
E. An AssertionError is thrown with the message “assertion passed”.
Answer: B
Q4. Given:
1. public class ReturnIt {
2. return Type methodA(byte x, double y) {
3. return (long)x / y * 2;
4. }
5. }
What is the narrowest valid returnType for methodA in line2?
A. int
B. byte
C. long
D. short
E. float
F. double
Answer: F
Q5. Given:
1. public class OuterClass {
2. private double d1 = 1.0;
3. // insert code here
4. }
Which two are valid if inserted at line 3? (Choose two)
A. static class InnerOne {
public double methoda() { return d1; }
}
B. static class InnerOne {
static double methoda() { return d1; }
}
C. private class InnerOne {
public double methoda() { return d1; }
}
D. protected class InnerOne {
static double methoda() { return d1; }
}
E. public abstract class InnerOne {
public abstract double methoda();
}
Answer: C, E
Q6. Given:
1. public class Foo {
2. public void main( String[] args ) {
3. System.out.printIn( “Hello” + args[0] );
4. }
5. }
What is the result if this code is executed with the command line?
java Foo world
A. Hello
B. Hello Foo
C. Hello world
D. Compilation fails.
E. The code does not run.
Answer: E
Q7. Given:
11. public void foo( boolean a, boolean b ){
12. if( a ) {
13. System.out.println( “A” );
14. } else if ( a && b ) {
15. System.out.println( “A&&B” );
16. } else {
17. if ( !b ) {
18. System.out.println( “notB” );
19. } else {
20. System.out.println( “ELSE” );
21. }
22. }
23. }
What is correct?
A. If a is true and b is true then the output is “A&&B”.
B. If a is true and b is false then the output is “notB”.
C. If a is false and b is true then the output is “ELSE”.
D. If a is false and b is false then the output is “ELSE”.
Answer: C
Q8. Which two cause a compiler error? (Choose two)
A. int[] scores = {3, 5, 7};
B. int [][] scores = {2,7,6}, {9,3,45};
C. String cats[] = {“Fluffy”, “Spot”, “Zeus”};
D. boolean results[] = new boolean [3] {true, false, true};
E. Integer results[] = {new Integer(3), new Integer(5), new
Integer(8)};
F. String[] dogs = new String[]{new String(“Fido”),new
String(“Spike”), new String(“Aiko”)};
Answer: B, D
Q9. Given:
11. int i = 0, j = 5;12. tp; for (;;) {
12. i++;
13. for(;;) {
14. if (i> --j) {
15. break tp;
16. break tp;
17. }
18. }
19. System.out.printIn(“i=” +i “,j =”+j);
What is the result?
A. i = 1, j = 0
B. i = 1, j = 4
C. i = 3, j = 4
D. i = 3, j = 0
E. Compilation fails.
Answer: E