In order to test your progress, you should be able to answer the following questions.
One of the differences between the nested tables and varrays is that
_____ nested tables can be sparse, and varrays cannot.
_____ varrays can be sparse, and nested tables cannot.
A varray has an upper bound that
_____ can be extended without any limits.
_____ can be extended to its maximum size.
_____ is fixed and cannot be extended to all.
A varray must be initialized prior to its use.
If a varray has maximum size of 5 and contains 2 elements
_____ the LIMIT and COUNT methods return the same value of 5.
_____ the LIMIT and COUNT methods return the same value of 2.
_____ the LIMIT method returns the value of 5, and the COUNT method returns the value of 2.
If a varray has eight elements, the DELETE (3, 7) method
_____ deletes the third and seventh elements of the collection.
_____ deletes the third element and ignores the seventh element of the collection.
_____ deletes the elements three to seven.
_____ causes an error.
Answers appear in Appendix A, Section 18.2 .