Java MCQ: Which of the following is not a real-life example of a Queue?
Answer:
Explanation:
Using a stack of dishes is not a real-life example of a queue; instead, it is an example of a stack, which operates on the LIFO (Last In First Out) principle. In a stack, the last dish added to the stack is the first one to be removed. This is in contrast to a queue, which operates on the FIFO (First In First Out) principle.
Real-life examples of queues include waiting in line to order food at a restaurant, waiting in line to buy movie tickets, and managing tasks on a CPU. In these situations, the first person or task to enter the queue is the first one to be processed, ensuring that order and fairness are maintained. In contrast, when stacking dishes, the dish placed on top is the first to be taken off, making it a LIFO scenario rather than FIFO.
Understanding the difference between queues and stacks is crucial in computer science, as they serve different purposes and are used in various applications depending on the required data processing order. Queues are ideal for situations where items need to be processed in the order they arrive, while stacks are useful for scenarios where the most recent item needs to be accessed first.