What is the time complexity of dequeuing an element from a queue implemented usi

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Question: What is the time complexity of dequeuing an element from a queue implemented using an array?

Options:

Correct Answer: O(n)

Solution:

Dequeuing an element from a queue implemented using an array can take O(n) time if all elements need to be shifted after removing the front element.

What is the time complexity of dequeuing an element from a queue implemented using an array?

What is the time complexity of dequeuing an element from a queue implemented using an array?

Step 1: Understand what 'dequeuing' means. Dequeuing is the process of removing an element from the front of a queue.
Step 2: Know that a queue can be implemented using an array. This means the elements are stored in a list format.
Step 3: When you remove the front element from the queue, the next element in the array needs to move to the front position.
Step 4: If there are 'n' elements in the queue, after removing the front element, you have to shift all 'n-1' elements one position to the left.
Step 5: Shifting 'n-1' elements takes time proportional to 'n', which is O(n) time complexity.
Step 6: Therefore, the time complexity of dequeuing an element from a queue implemented using an array is O(n).

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