Consider the following method definition. The method isReversed is intended to return true if firstList and secondList contain the same elements but in reverse order, and to return false otherwise.

/** Precondition: firstList.size() == secondList.size() */

public static boolean isReversed(ArrayList firstList,

ArrayList secondList)

{

for (int j = 0; j < firstList.size() / 2; j++)

{

if (firstList.get(j) != secondList.get(secondList.size() - 1 - j))

{

return false;

}

}

return true;

}

The method does not always work as intended. For which of the following inputs does the method NOT return the correct value?

A. When firstList is {1, 3, 3, 1} and secondList is {1, 3, 3, 1}

B. When firstList is {1, 3, 3, 1} and secondList is {3, 1, 1, 3}

C. When firstList is {1, 3, 5, 7} and secondList is {5, 5, 3, 1}

D. When firstList is {1, 3, 5, 7} and secondList is {7, 5, 3, 1}

E. When firstList is {1, 3, 5, 7} and secondList is {7, 5, 3, 3}

2)In the code segment below, myList is an ArrayList of integers. The code segment is intended to remove all elements with the value 0 from myList.

int j = 0;

while (j < myList.size())

{

if (myList.get(j) == 0)

{

myList.remove(j);

}

j++;

}

The code segment does not always work as intended. For which of the following lists does the code segment NOT produce the correct result?

A. {0, 1, 2, 3}

B. {0, 1, 0, 2}

C. {1, 0, 0, 2}

D. {1, 2, 3, 0}

E. {1, 2, 3, 4}

Answer rating: 100% (QA)

answer for 1 E answer for 2 ... View the full answer