Which of the following are legal assignments? List the statement number. 1. Book

Question

Which of the following are legal assignments? List the statement number.

1. Book b = new Book();

2. Book b = new Dictionary();

3. Book b = new eBook();

4. eBook b = new Book();

5. eBook b = new Dictionary();

6. eBook b = new eBook();

7. Dictionary b = new Book();

8. Dictionary b = new Dictionary();

9. Dictionary b = new eBook();

10. Object b = new Book();

11. Object b = new Dictionary();

12. Object b = new eBook();

13. Book b = new Object();

14. Dictionary b = new Object();

15. eBook b = new Object();

Explanation / Answer

Which of the following are legal assignments? List the statement number.

Answer:

1. Book b = new Book();
6. eBook b = new eBook();
8. Dictionary b = new Dictionary();
10. Object b = new Book();
11. Object b = new Dictionary();
12. Object b = new eBook();

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