Question: 9. The ADT dictionary does not permit key-null pairs. 10. A key that has no value associated with it does not appear in the dictionary.

9. The ADT dictionary does not permit key-null pairs. 10. A key that has no value associated with it does not appear in the dictionary. 11. You cannot traverse a dictionary by both the keys and values in parallel. 12. You can traverse all the keys in a dictionary without traversing the values. 13. You cannot traverse all the values in a dictionary without traversing the keys.

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