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Question

Which of the following best describes the growth of a linear queue at runtime? (Q is the original queue, size() returns the number of elements in the queue)
a)

private void expand()
{
 int length = size();
 int[] newQ = new int[length<<1];
 for(int i=front; i<=rear; i++)
 {
  newQ[i-front] = Q[i%CAPACITY];
 }
 Q = newQ;
 front = 0;
 rear = size()-1;
}

b)

private void expand()
{
 int length = size();
 int[] newQ = new int[length<<1];
 for(int i=front; i<=rear; i++)
 {
  newQ[i-front] = Q[i%CAPACITY];
 }
 Q = newQ;
}

c)

private void expand()
{
 int length = size();
 int[] newQ = new int[length<<1];
 for(int i=front; i<=rear; i++)
 {
  newQ[i-front] = Q[i];
 }
 Q = newQ;
 front = 0;
 rear = size()-1;
}

d)

private void expand()
{
 int length = size();
 int[] newQ = new int[length*2];
 for(int i=front; i<=rear; i++)
 {
  newQ[i-front] = Q[i%CAPACITY];
 }
 Q = newQ;
}

a.

a

b.

b

c.

c

d.

d

Answer: (a).a

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Q. Which of the following best describes the growth of a linear queue at runtime? (Q is the original queue, size() returns the number of elements in the queue)

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