Data Structures and Algorithms-I MCQs

Page No. 32

What is a hash function?


aA function has allocated memory to keys


bA function that computes the location of the key in the array


cA function that creates an array


dA function that computes the location of the values in the array



If several elements are competing for the same bucket in the hash table, what is it called?


aDiffusion


bReplication


cCollision


dDuplication


View Answer Collision

What is a hash table?


aA structure that maps values to keys


bA structure that maps keys to values


cA structure used for storage


dA structure used to implement stack and queue



What is the worst case search time of a hashing using separate chaining algorithm?


aO(N log N)


bO(N)


cO(N2)


dO(N3)


View Answer O(N)

Which of the following is a disadvantage of using separate chaining using linked lists?


aIt requires many pointers


bIt requires linked lists


cIt uses array


dIt does not resolve collision



In hash tables, how many traversal of links does a successful search require?


a1+⅄


b1+⅄2


c1+ (⅄/2)


d3


View Answer 1+ (⅄/2)

What is the correct notation for a load factor?


a


b


c


d


View Answer

Which of the following is the hashing function for separate chaining?


aH(x)=(hash(x)+f(i)) mod table size


bH(x)=hash(x)+i2 mod table size


cH(x)=x mod table size


dH(x)=x mod (table size * 2)


View Answer H(x)=x mod table size

Which of the following is identical to that of a separate chaining hash node?


aLinked list


bArray


cStack


dQueue


View Answer Linked list

Which of the following operations are done in a hash table?


aInsert only


bSearch only


cInsert and search


dReplace


View Answer Insert and search

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