hash quiz
Which of the following is not a property of Java's hashCode() for the String data type?
can return a negative integer
can take time proportional to the length of the string to compute
a string and its reverse will have the same hashCode()
two strings with different hashCode() values are different strings
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What is the average running time of a random search miss in a separate chaining hash table? Assume that your hash function satisfies the uniform hashing assumption and that there are M=N/8 chains, where N is the number of items.
constant
logarithmic
linear
linearithmic
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What is the average running time of delete in a linear-probing hash table? Assume that your hash function satisfies the uniform hashing assumption and that the hash table is at most 50% full.
constant
logarithmic
linear
linearithmic
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What is the main reason to use a hash table instead of a red-black BST?
supports more operations efficiently
better worst-case performance guarantee
better performance in practice on typical inputs
implementation included in Java libraries
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