Gate CS-2007 Question Paper With Solutions

Q. 78 Consider the following C program segment where Cell Node represents a node in

a binary tree

struct CellNode {
    struct CellNode *leftChild;
    int element;
    struct CellNode *rightChild;
};

int Getvalue (struct CellNode *ptr) {
    int value = ;
    if (ptr != NULL) {
        if ((ptr->leftChild == NULL) &&
            (ptr->rightChild == NULL))
            value = 1;
        else
            value = value + GetValue(ptr->leftChild)
                      + GetValue(ptr->rightChild);
    }
    return(value);
}

The value returned by Get Value when a pointer to the root of a binary tree is

passed as its argument is

(A) the number of nodes in the tree

(B) the number of internal nodes in the tree

(C) the number of leaf nodes in the tree

(D) the height of the tree

Answer: (C)

Explanation:

Gate CS-2007 Question Paper With Solutions

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