In order to test your progress, you should be able to answer the following questions.
The main difference between the index-by and nested tables is that
_____ nested tables can be stored in a database column, and index-by tables cannot.
_____ index-by tables can be stored in a database column, and nested tables cannot.
An index-by table is indexed by what datatype?
A nested table must be initialized prior to its use.
If a PL/SQL table contains one element
_____ the FIRST method returns value of one, and the LAST method returns NULL.
_____ the FIRST method returns NULL, and the LAST method returns value of one.
_____ the FIRST and LAST methods return a value of one.
_____ referring to these methods causes an error.
If a PL/SQL table has eight elements, the DELETE (3, 7) method deletes
_____ the third and seventh elements of the collection.
_____ the third element and ignores the seventh element of the collection.
_____ elements three to seven.
Answers appear in Appendix A, Section 18.1 .