Hash function

Hashing an array

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Consider the following hash function for an array of integers:

if the array has at least 5 elements, pick 5 of them at random and return their sum as their hash value
if there are fewer than 5, return the sum of all elements.

Select all the reasons why this is not a good hash function:

Select one or more options from the list

It is too slow

The same array can have different hash values

Does not take all the values in the array into consideration

For arrays with fewer than 5 values, the hash value is the same regardless of the order of the values, as long as the arrays contain the same values

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