Quiz-1

Explanation: A hash table is used to implement associative arrays which has a key-value pair, so the has table maps keys to values.

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Direct addressing is possible only when we can afford to allocate an array that has one position for every possible key.

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Explanation: In a hash table, there are fewer array positions than the keys, so the position of the key in the array has to be computed, this is done using the hash function.

Explanation: Making the hash function random is not really a good choice, although it is considered one of the techniques to avoid collisions along with chaining and simple uniform hashing.

Explanation: In simple chaining, load factor is the average number of elements stored in a chain, and is given by the ratio of number of elements stored to the number of slots in the array.

Explanation: In simple uniform hashing, any given element is equally likely to hash into any of the slots available in the array.

Explanation: There are two cases, once when the search is successful and when it is unsuccessful, but in both the cases, the complexity is O(1+alpha) where 1 is to compute the hash function and alpha is the load factor.

Explanation: Deletion becomes easier with doubly linked list, hence it is appropriate.