Question

Which of the following expressions correctly computes the midpoint of an ArrayQueue? int mid = (first...

Which of the following expressions correctly computes the midpoint of an ArrayQueue?

int mid = (first % data.length + size % data.length) / 2;

int mid = (first + size) % data.length / 2;

int mid = (first + size) / 2 % data.length;

int mid = (first + size / 2) % data.length;

which one is the correct option ?

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Answer #1

The expressions which correctly computes the midpoint of an ArrayQueue is

int mid = (first + size) / 2 % data.length

Explanation: Here, first refers to the location of first element, size refers to size of the ArrayQueue. The expression: data.length refers to the length of the array up to which data is present.

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