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In linked list implementation of queue, if only front pointer is maintained, which of the following operation take worst case linear time?

(a) Insertion

(b) Deletion

(c) To empty a queue

(d) Both Insertion and To empty a queue

My question is taken from Queue using Linked List topic in portion Abstract Data Types of Data Structures & Algorithms I

I got this question during an interview for a job.

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Best answer
Right option is (d) Both Insertion and To empty a queue

The best I can explain: Since front pointer is used for deletion, so worst time for the other two cases.

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