Consider the following linked list:
S is the header pointer and P is an empty pointer. Perform given operations in sequence in this linked list:
(i) P = S → next → next → next
(ii) P → next → next → next → next = S → next → next → next → next
(iii) S → next → next → next = P → next → next
(iv) X = S → next → next → next → next → next → next → next → data
What will be the value of X?
(A) 5
(B) 6
(C) 7
(D) Segmentation Error
Answer: (C)
Explanation: Final linked list will be as given below after performing given operation in sequence:
(i) P = S → next → next → next
P = 1000 → 2000 → 3000 → 4000
(ii) P → next → next → next → next = S → next → next → next → next
P → 5000 → 6000 → 7000 → null = S → 2000 → 3000 → 4000 → 5000
(iii) S → next → next → next = P → next → next
S → 2000 → 3000 → 4000 = P → 5000 → 6000
Therefore, value of X will be:
X = S → next → next → next → next → next → next → next → data
X = 1000 → 2000 → 3000 → 6000 → 7000 → 5000 → 6000 → 7000 → 7
X = 7
So, option (C) is correct.
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