Data Structures and Algorithms-I MCQs

Page No. 37

Which of the following helps keys to be mapped into addresses?


ahash function

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bseparate chaining

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copen addressing

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dchaining using a linked list

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View Answer hash function

What is the formula to find the expected number of probes for an unsuccessful search in linear probing?


a1/2 1+1/(1−⅄)

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b1/2 1+1/(1−⅄)2

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c1/2 1+1/(1+⅄)

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d1/2 1+1/(1+⅄)(1−⅄)

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View Answer 1/2 1+1/(1−⅄)2

Hashing can be used in online spelling checkers.


aTrue

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bFalse

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cNone of the given options

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deither true either false

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View Answer True

What is the hash function used in linear probing?


aH(x)= key mod table size

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bH(x)= (key+ F(i2)) mod table size

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cH(x)= (key+ F(i)) mod table size

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dH(x)= X mod 17

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___________ is not a theoretical problem but actually occurs in real implementations of probing.


aHashing

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bClustering

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cRehashing

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dCollision

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View Answer Clustering

Which of the following is the correct function definition for linear probing?


aF(i)= 1

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bF(i)=i

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cF(i)=i2

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dF(i)=i+1

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View Answer F(i)=i

In linear probing, the cost of an unsuccessful search can be used to compute the average cost of a successful search.


aTrue

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bFalse

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cNone of the given options

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deither true either false

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View Answer True

Which of the following is not a collision resolution strategy for open addressing?


aLinear probing

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bQuadratic probing

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cDouble hashing

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dRehashing

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View Answer Rehashing

What is the load factor for an open addressing technique?


a1

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b0.5

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c1.5

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d0

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View Answer 0.5

How many probes are required on average for insertion and successful search?


a4 and 10

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b2 and 6

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c2.5 and 1.5

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d3.5 and 1.5

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View Answer 2.5 and 1.5

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