Data Structures Algorithms-II MCQs

Page No. 148

What will be the output if quickselect algorithm is applied to the array arr={1,5,4,3,7} with k given as 4?


a1

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b3

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c4

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d5

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View Answer 5

Quickselect is an example of ___________


asorting algorithm

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bselection algorithm

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cgreedy algorithm

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dsearching algorithm

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View Answer selection algorithm

Which of the following is an alternative name of the quickselect algorithm?


aquick sort

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bhoare’s selection algorithm

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ctony’s selection algorithm

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dkruskal’s algorithm

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Co-ordinate compression can only be applied in a co-ordinate system problem.


atrue

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bfalse

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cA & B

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d None of these

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View Answer false

Co-ordinate compression reduces the number of squares in a graph.


a true

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bfalse

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cA & B

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d None of these

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View Answer true

What is the need for co-ordinate compression?


afor improving time complexity

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bfor improving space complexity

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c for improving both time and space complexity

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dfor making code simpler

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What is co-ordinate compression?


aprocess of reassigning co-ordinates to remove gaps

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binserting gaps in a co-ordinate system

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cremoving redundant co-ordinates

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dadding extra gaps

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What will be the time complexity of the code to find a minimum element from an array of size n and uses square root decomposition(exclude pre processing time)?


aO(√n)

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bO(n)

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cO(1)

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dO(n2)

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View Answer O(√n)

Mo’s algorithm can only be used for problems where the query can be calculated from the result of the previous query.


atrue

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bfalse

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cA & B

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d None of these

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View Answer true

What will be the worst case time complexity of code to find sum in given query range (l,r) in an array of size n with q number of such queries when we apply MO’s algorithm?


aO(n*q)

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bO(n)

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cO((q+n)√n)

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dO(q*√n)

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View Answer O((q+n)√n)

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