Which of the following situations may not require the use of null value a) When a particular attribute does not apply to an entity. b) Value of an attribute is unknown, although it exist, c) Unknown because it does not exist. d) Multi value attributes may be nested (or grouped) to constitute complex ones.

Which of the following situations may not require the use of null valu

1.	Which of the following situations may not require the use of null value a) When a particular attribute does not apply to an entity. b) Value of an attribute is unknown, although it exist, c) Unknown because it does not exist. d) Multi value attributes may be nested (or grouped) to constitute complex ones.
Answer» Correct Answer - d

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