Need clarification: SCJP questions

Question

The following code when pasted in eclipse is giving a compilation error but the answers are as given below!!
Please explain.
Question 1
Given:
11. static classA {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println(�B �); }
16. }
17. public static void main(String[] args) {
18.A a=new B();
19. a.process();
20.}
What is the result?
A. B
B. The code runs with no output.
C. An exception is thrown at runtime.
D. Compilation fails because of an error in line 15.
E. Compilation fails because of an error in line 18.
F. Compilation fails because of an error in line 19.
Answer: F
Question 2
Given:
11. static class A {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println(�B�); }
16. }
17. public static void main(String[] args) {
18. new B().process();
19. }
What is the result?
A. B
B. The code runs with no output.
C. Compilation fails because of an error in line 12.
D. Compilation fails because of an error in line 15.
E. Compilation fails because of an error in line 18.
Answer: A
Thanks in Advance!!

Answer 1

Please correct me if I am wrong as I am in the learning process.Casting the reference to a B type allows the code to compile because B.process() doesn't throw an exception and the javac compiler is smart enough to catch that. However, catching the exception or declaring main as throwing it also allows the class to compile; the solution does not require casting. Examples:
class A {
    void process() throws Exception {
        throw new Exception();
class B extends A {
    void process() {
        System.out.println("B ");
    public static void main(String[] args) {
        A a=new B();
        try { a.process(); } catch (Exception e) { /* handle */ }
}Or: class A {
    void process() throws Exception {
        throw new Exception();
class B extends A {
    void process() {
        System.out.println("B ");
    public static void main(String[] args) throws Exception {
        A a=new B();
        a.process();
}~