I once had a conflict with a person(a friend) that was doing something incorrectly and it was obvious to everybody around them. I tried to tell them that but they didn't like the truth and tried to blame me for my honesty, even though we were supposed to be honest with each other. Nothing major happened after that, we just talked it over and solved the conflict without letting it get out of hand.
Stack is like a pile of books placed on top of each other. We can add new books to the top and can remove them from only the top because stacks are LIFO which means last-in, first-out. Queues on the other hand are the opposite, which is FIFO meaning first-in, first-out. So adding an element to the queue will be the same but removing will happen to the first element not the last one. An example of a queue would be the wait line in front of any kind of service we see around us like the bus station or the shops,....etc.
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