Assume an array-based list implemented by a class that uses the fields
String [ ] list;
Int nElements;
To represent the array of elements,and the number of elements currently stored.Assuming there is space
In the internal array,the code for adding a new item str to the end of the list is
A) list.add(str);
B) list[nElements] = str;
C) list[nElements] = str;nElements++;
D) nElements ++;list[nElements] = str;

Question

Quizplus · Accepted Answer

Option A is incorrect because there is no add() method in an array.

Option B is incorrect because it only assigns the value to the last index of the list but it doesn't update the nElements to keep track of the new element.

Option D is incorrect because it updates the nElements before adding the new element to the list, so it will add the new element to an incorrect index and overwrite the existing element's value.

Option C is the correct choice because it assigns the new element to the next available index, which is the value of nElements, and then increments the nElements value to indicate that a new element has been added to the list.

Assume an Array-Based List Implemented by a Class That Uses