Quickselect Multiple choice Questions and Answers (MCQs)

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Quickselect Multiple choice Questions and Answers (MCQs)

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Question 1 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Which of the following is an alternative name of the quickselect algorithm?
A
quick sort
B
hoare's selection algorithm
C
tony's selection algorithm
D
kruskal's algorithm
Question 1 Explanation: 
Quick select is a selection algorithm. It was developed by Tony Hoare, thus it is also known as Hoare's selection algorithm.

Question 2 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Quickselect is an example of .....
A
sorting algorithm
B
selection algorithm
C
greedy algorithm
D
searching algorithm
Question 2 Explanation: 
Quickselect is an example of a selection algorithm. It finds the kth smallest element from the given list.

Question 3 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
What will be the output if quickselect algorithm is applied to the array arr={1, 5, 4, 3, 7} with k given as 4?
A
1
B
3
C
4
D
5
Question 3 Explanation: 
Quickselect algorithm finds the kth smallest element from the given list. So as here the given value of k is 4 so we need to find the fourth smallest element which is 5 in the given array.

Question 4 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
What is the auxiliary space requirement of the quickselect algorithm?
A
O(n2)
B
O(n)
C
O(n log n)
D
O(1)
Question 4 Explanation: 
Quickselect algorithm requires no extra space in order to calculate the desired result. It performs manipulations in the given array itself so its auxiliary space requirement will be O(1).

Question 5 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Quickselect is an in-place algorithm?
A
true
B
false
Question 5 Explanation: 
Quickselect's auxiliary space requirement is O(1). So quickselect qualifies as an in-place algorithm.

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