Comb Sort Multiple choice Questions and Answers (MCQs)

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Comb Sort 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]
Comb sort is an improved version of .....
A
Selection sort
B
Bubble sort
C
Insertion sort
D
Merge sort
Question 1 Explanation: 
Comb sort compares two elements at a variable gap from each other in each iteration unlike bubble sort where the gap remains 1. This reduces the average time complexity of comb sort.

Question 2 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
The gap between two elements being compared shrinks by a factor of ..... after every iteration.
A
1.1
B
1.2
C
1.3
D
1.4
Question 2 Explanation: 
It has been found experimentally that the gap between the two elements should shrink by a factor of 1.3 after each iteration for the most efficient sorting.

Question 3 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
The initial gap between two elements being compared .....
A
is equal to number of elements in the array
B
is equal to 1.3
C
depends on the number of iterations
D
depends on the compiler being used
Question 3 Explanation: 
Initial gap is taken to be equal to the number of elements in the array and shrinks by a factor of 1.3 in each iteration, initial gap is independent of the number of iterations and compiler being used.

Question 4 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
What is the worst case time complexity of comb sort?
A
O(n2)
B
O(n log n)
C
O(n)
D
O(n2/2a) (a=number of increment)
Question 4 Explanation: 
Worst case complexity is observed when the input array is reverse sorted. This is same as the worst case complexity of bubble sort.

Question 5 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
The gap value after 3 iterations in an array with 6 elements will be .....
A
4
B
3
C
2
D
1
Question 5 Explanation: 
Initially the gap value will be 6. For the first iteration, it will be 6/1.3=4 then 4/1.3=3 for second iteration and 3/1.3=2 for the third iteration.

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