Therefore, it follows first-in-first-out FIFO strategy of queue.http://www.stringrecordings.com/img/historical/the-christmas-chapter-temptation-unleashed.php
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Vehicles on toll-tax bridge: The vehicle that comes first to the toll tax booth leaves the booth first. The vehicle that comes last leaves last. Phone answering system: The person who calls first gets a response first from the phone answering system. The person who calls last gets the response last.
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Luggage checking machine: Luggage checking machine checks the luggage first that comes first. Therefore, it follows FIFO principle of queue. Patients waiting outside the doctor's clinic: The patient who comes first visits the doctor first, and the patient who comes last visits the doctor last. Therefore, it follows the first-in-first-out FIFO strategy of queue. Stack is a linear data structure in which item insertion or deletion takes place at only one place called TOP.
Stack is also called as LIFO or restricted list. What is LIFO? LIFO - Last In First Out It is the principle which specifies that the data item that is inserted last into the stack is the first one to be deleted from the stack. Where do we use them and why? I heard that we use them in Video Games and Computer Simulation programs, is that true?
Apart from these two areas what are other practical applications of Queues as a data structure? Queues are used for any situation where you want to efficiently maintain a First-in-first out order on some entities. These situations arise literally in every type of software development.
Imagine you have a web-site which serves files to thousands of users. You cannot service all requests, you can only handle say at once. A fair policy would be first-come-first serve: A Queue would definitely be the most appropriate data structure. Similarly in a multitasking operating system, the CPU cannot run all jobs at once, so jobs must be batched up and then scheduled according to some policy.
Again, a queue might be a suitable option in this case. Stacks are used for the undo buttons in various softwares.
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The recent most changes are pushed into the stack. Even the back button on the browser works with the help of the stack where all the recently visited web pages are pushed into the stack. Queues are used in case of printers or uploading images. Where the first one to be entered is the first to be processed.
I use a queue to prioritise my replying to SO questions. I tried multiprocessing them, but made a complete hash of it. Say you have a number of documents to be printed at once. Your OS puts all of these docs in a queue and sends them to the printer. The printer takes and prints each document in the order the docs are put in the queue, ie, First In, First Out. In the situation where there are multiple users or a networked computer system, you probably share a printer with other users.
When you request to print a file, your request is added to the print queue.
Queue and Queue Applications
When your request reaches the front of the print queue, your file is printed. This ensures that only one person at a time has access to the printer and that this access is given on a first-come, first-served basis. This pattern is used in all web servers, among others.
The tennis balls in their container.. At least 10 examples TNX: Jul 13 ' Post Reply. Share this Question.
STACK AND QUEUE ("Real Life Examples")
Heya, playagain. The obvious example of a queue is Such as at the DMV, except there, you only go in. Nobody ever comes out. You're on the right track. What else have you come up with? Jul 14 ' Jul 17 ' I'll post one more of each , but then you won't get any more until you post some examples that you have come up with.
An example of a stack, while we're on the subject of firearms, is a handgun magazine.
Related queue applications in real life
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