You have a large Hash Table with the capacity for holding N elements in it. N/2 data items are to be stored in the table. Which of the following factors is the most important for influencing the performance of the table?Question 48AnswerSize of the hash table.cross outThe number of entries in the table that are occupied.cross outThe size of the data items stored in the table.cross outQuality of the hash function.
Question
You have a large Hash Table with the capacity for holding N elements in it. N/2 data items are to be stored in the table. Which of the following factors is the most important for influencing the performance of the table?Question 48AnswerSize of the hash table.cross outThe number of entries in the table that are occupied.cross outThe size of the data items stored in the table.cross outQuality of the hash function.
Solution
The most important factor influencing the performance of the hash table is the quality of the hash function.
A good hash function distributes the keys uniformly across the hash table, which minimizes the chance of collisions (where two keys hash to the same index). When collisions are minimized, the time complexity for search, insert, and delete operations approaches O(1), which is the ideal performance for a hash table.
On the other hand, if the hash function is not good and causes many collisions, these operations can degrade to O(N), where N is the number of entries in the table. This is because in the worst-case scenario, a hash table with many collisions degenerates into a linked list.
Therefore, while the size of the hash table, the number of occupied entries, and the size of the data items can all affect performance to some extent, the quality of the hash function is the most important factor.
Similar Questions
When should you extend a hash table?Question 28Select one:If the load factor goes to zero.cross outIf the number of keys stored in the table is less than the capacity of the table.cross outIf the number of bins is large.cross outIf there are many collisions.
What is the advantage of a hash table as a data structure?a.easy to implementb.exhibit good locality of referencec.very efficient for less number of entriesd. faster access of data
What is the load factor of a hash table?Group of answer choicesThe number of elements divided by the size of the hash table.The number of elements in the hash table.The size of the hash table.The number of collisions in the hash table.
ou have a large Hash Table with N entries. You will be adding N/4 items to the table. Assuming that you have a good hash function, what is the expected time complexity for searching for an item in this data structure?Question 50AnswerO(1).cross outO(N).cross outO(N/4).cross outO(log N).
What is the best case time complexity of insertion in a hash table with the implementation you used during the previous Hash Table C project (chaining)?O(n)O(1)O(log(n))O(nlog(n))O(2^n)O(n!)O(n^2)
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