Prentice Hall Oracle Plsql By Example 3Rd Edition [Electronic resources] نسخه متنی

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Prentice Hall Oracle Plsql By Example 3Rd Edition [Electronic resources] - نسخه متنی

Benjamin Rosenzweig

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Lab 18.2 Self-Review Questions


In order to test your progress, you should be able to answer the following questions.

1)

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.

  • 2)

    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.

  • 3)

    A varray must be initialized prior to its use.

  • _____ True

  • _____ False

  • 4)

    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.

  • 5)

    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 .


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