Which of the following scenarios results in the worst-case number of comparisons in insertion sort?单项选择题

A

a. elements in the input array are already sorted in the desired order

B

b. elements in the input array are randomized (not already sorted)

C

c. elements in the input array are already sorted in the opposite of the desired order

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Which of the following statements are true regarding Quicksort?

When QuickSort repeatedly produces highly skewed partitions (for example, the pivot always becomes the smallest or largest element), what is the resulting time complexity, given the explanations below?  

Sorting Complexity For an array of N integers that are in the ascending order  as shown below, give the time complexity for each sorting algorithm. 1,2,3, ... , N-2, N-1, N 1: Insertion Sort 2: Selection Sort 3: Bubble Sort 4: Merge Sort 5: Tree (BST) Sort (hint:Is BST very unbalanced?)

Sorting The following is the correct operation sequence of the _____________ sort. A.     Input: 3  4  5  1  6  2     iteration 1: 3 4  1 5  2 6     iteration 2: 3 1  4 2  5  6     iteration 3: 1 3  2 4  5  6     iteration 4: 1 2  3 4  5  6     iteration 5: 1 2  3 4  5  6 B.     Input: 3  4  5  1  6  2     iteration 1: 3  4  5  1  6  2     iteration 2: 3  4  5  1  6  2     iteration 3: 1 3  4  5 6  2     iteration 4: 1  3  4  5  6  2     iteration 5: 1  2  3  4  5  6   C:   Input:          3  4  5  1  6  2     iteration 1:   1  4  5  3  6  2     iteration 2:    1  2  5  3  6  4     iteration 3:    1  2  3  5  6  4     iteration 4:    1  2  3  4  6  5         iteration 5:    1  2  3  4  5  6   1: A 2: B 3: C

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