Consider integer array values,which contains 5 elements.Which statements successfully swap the contents of the array at index 3 and index 4
A)
values[3] = values[4];
values[4] = values[3];
B)
values[4] = values[3];
values[3] = values[4];
C)
int temp = values[3];
values[3] = values[4];
values[4] = temp;
D)
int temp = values[3];
values[3] = values[4];
values[4] = values[3];

Question

Consider integer array values,which contains 5 elements.Which statements successfully swap the contents of the array at index 3 and index 4
A) 
values[3] = values[4];
values[4] = values[3];
B) 
values[4] = values[3];
values[3] = values[4];
C) 
int temp = values[3];
values[3] = values[4];
values[4] = temp;
D) 
int temp = values[3];
values[3] = values[4];
values[4] = values[3];

Quizplus · Accepted Answer

Option C uses a temporary variable to store the value of index 3 and then swaps the values of index 3 and 4 using the temporary variable. This is a correct way of swapping values in an array. Option A and B do not use a temporary variable and result in both index 3 and 4 having the same value. Option D swaps the values of index 3 and 4, but then assigns the value of index 3 to index 4 again, resulting in index 4 having the original value of index 3 instead of the value of index 4.

Consider Integer Array Values,which Contains 5 Elements