Sample Questions for Computer Science A 25. The following sort method correctly

Question

Sample Questions for Computer Science A 25. The following sort method correctly sorts the integers in elements into ascending order. Line 1: public static void sort (int elements Line 2: Line 3 for (int j 0; j elements. length 1; j Line 4 Line 5. int index j; Line 6 Line 7: for (int k j 1; k elements length; k++) Line 8 Line 90 if elements [k elements [index Line 10: Line 11: index k; Line 12: Line 13: Line 14: int temp elements [j] Line 15: Line 16: elements [j elements [index] elements (index temp Line 17: Line 18: Line 19:

Explanation / Answer

considering example
elements: 3 4 2 5 1

initially j = 0
index = 0
k starts from 1 to end of elements array
now, each time a value lower than value at index in elements array is
obtained, index is updated to k
hence, considering , 3 4 2 5 1
index is 0
k = 1, 4(value at elements[1]) is greater than 3(value at elements[0]), do nothing
k = 2, 2 is less than 3, update index to 2
k = 3, 5 is greater than 2, do nothing
k = 4, 1 is less than 2, update index to 4

now the loop ends, and
elements[j] and elements[index] is swapped.
updated array is 1 4 2 5 3 and the loop continues

Hence, the sort method, finds the lowest value in array
and puts it in front of array to sort values in asending order.

TO make them in descending order,
option 1 can be used in line 9 by changing the < to >
which will find the highest value first and keep it in the from of array
hence option 1, is TRUE


option does the same exact thing in opposite direction,
it sorts the array is ascending order from back of the array.
hence, the array will be sorted in descending order from front of the array
and ascending from back
Therefore, option 3 is also TRUE.

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