12. Start with an empty max-heap of integers, and enter the ten numbers 1 through 10. Let the max-heap be stored in an array. Remove one entry from the heap. What index is 3 stored at in the array? (A) 5；(B) 4； (C)3；(D) 2.

Note: There are 20 questions in total. Each one is 5 points. Please choose one answer for each question. No extra points will be deducted for wrong answers. 1. Suppose a node in a linked list A contains two fields, data and link, where link is the pointer to the following node. Let head-ptr be a pointer to the first node of A. Suppose we would like to traverse all the nodes of A by the loop "while (Ihead.ptr){B；}". What is B?(A) head. ptr == NULL； (B) head-pr = x(head-ptr) → link； (C) head-ptr = head-ptr -＞ link； (D) thead ptr = x(head_ptr) → link.

12. Start with an empty max-heap of integers, and enter the ten numbers 1 through 10. Let the max-heap be stored in an array. Remove one entry from the heap. What index is 3 stored at in the array?
(A) 5；
(B) 4；
(C)3；
(D) 2.

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