CS3401 Quiz 6
Which of the following are the three major categories of Java Collections?
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lists, sets, maps
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hash tables, hash maps, hash sets
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arraylists, linkedlists, vectors
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trees, lists, maps
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A collection that does not impose a positional order on its elements, and does not allow duplicates is called which of the following?
A hashmap
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A linkedlist
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A vector
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A set
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A collection whose elements are pairs of keys and values is called which of the following?
An iterator
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A map
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A binary tree
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A heap
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Ideally, the hash codes of two objects should be which of the following:
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The should be equal when the objects belong to the same class, and different when the objects belong to different classes
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They should be equal when the objects are of the same type, and different when the objects are of different types
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They should be equal when the objects have equal values, and different when the objects have different values
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None of the above, because it doesn't matter if they are equal or different
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A collision occurs in a hash table when which of the following happens?
Objects whose class types are different have the same hash code
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Objects whose class types are the same have different hash codes
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Objects of the same class and with different values have different hash codes
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Objects of the same class and with different values have the same hash code
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