Function has allocated memory to keys
A function that computes the location of the key in the array
Function that creates an array
None of the mentioned
Answer :: (B)
A hash function is any function that can be used to map data of arbitrary size to fixed-size values. The values returned by a hash function are called hash values, hash codes, digests, or simply hashes. The values are used to index a fixed-size table called a hash table. Use of a hash function to index a hash table is called hashing or scatter storage addressing.
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Make the hash function appear random
Use the chaining method
Use uniform hashing
All of the mentioned
Answer :: (D)
Making the hash function random is not really a good choice, although it is considered one of the techniques to avoid collisions along with Separate chaining and Simple Uniform Hashing.
Distinct array position for every possible key
Fewer array positions than keys
Fewer keys than array positions
Direct addressing is possible only when we can afford to allocate an array that has one position for every possible key.
A structure that maps values to keys
Structure that maps keys to values
A structure used for storage
Structure used to implement stack and queue
A hash table is used to implement associative arrays which has a key-value pair, so the hash table maps keys to values.
Answer :: (C)
When several elements compete for the same bucket in the hash table it is called Collision.
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. Chaining is the best
Since every key has a unique array position, searching takes a constant time
When more than one element are competing for the same bucket in the hash table, this condition is known as the Collision.
Every element has equal probability of hashing into any of the slots
A weighted probabilistic method is used to hash elements into the slots
In simple uniform hashing, any given element is equally likely to hash into any of the slots available in the array.
Average array size
Average key size
Average chain length
None of the mentioned
In simple chaining, the load factor is the average number of elements stored in a chain and is given by the ratio of a number of elements stored to the number of slots in the array.
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