Abstract data type- queue, Data Structure & Algorithms

Assignment Help:

A significant aspect of Abstract Data Types is that they explain the properties of a data structure without specifying the details of its implementation. The properties might be implemented independent of any implementation in any programming language.

Queue is a set of elements, or items, for which the given operations are defined:

createQueue(Q) : It create an empty queue Q;

isEmpty(Q): is a boolean type predicate which returns ''true'' if Q exists and is empty, and returns ''false'' otherwise;

addQueue(Q,item) adds the given item to the queue Q; and deleteQueue (Q, item) : delete an item through the queue Q;

next(Q) eliminate the least recently added item which remains in the queue Q, & returns it as the value of the function;

isEmpty (createQueue(Q)) : It is always true, and deleteQueue(createQueue(Q)) : error

The primitive isEmpty(Q) is needed to know whether the queue is empty or not, Since calling next on an empty queue must cause an error. Like stack, the situation might be such while the queue is "full" in the case of a finite queue. But we ignore defining this here as it would based on the real length of the Queue defined in a particular problem.

The word "queue" is like the queue of customers at counter for any service, wherein customers are dealt along with in the order where they arrives i.e. first in first out (FIFO) order. In most of the cases, in the queue the first customer is the first to be served.

As pointed out previous, Abstract Data Types define the properties of a structure without indicating an implementation in any way. Therefore, an algorithm that works with a "queue" data structure will work wherever this is implemented. Usually different implementations are of different efficiencies.


Related Discussions:- Abstract data type- queue

File organisation, File organisation might be described as a method of stor...

File organisation might be described as a method of storing records in file. Also, the subsequent implications approaching these records can be accessed. Given are the factors invo

Explain about the abstract data type, Explain about the Abstract data type ...

Explain about the Abstract data type Abstract data type (ADT) A set of values (the carrier set) and operations on those values

Write algorithm for post-order traversal, P os t - o r d e r T ...

P os t - o r d e r T r av er sal :  This can be done by both iteratively and recursively. The iterative solution would require a modification or alteration of the in-

State the range of operation of abstract data type, State the range of oper...

State the range of operation of ADT Operations of the Range of T ADT includes following, where a, b ∈ T and r and s are values of Range of T: a...b-returns a range value (an

Explain the theory of computational complexity, Explain the theory of compu...

Explain the theory of computational complexity A  problem's  intractability  remains  the  similar  for  all  principal  models  of   computations    and   all reasonable inpu

The number of different directed trees with 3 nodes, The number of differen...

The number of different directed trees with 3 nodes are ?? The number of disimilar directed trees with three nodes are 3

What is complexity, Complexity is the rate at which the needed storage or c...

Complexity is the rate at which the needed storage or consumed time rise as a function of the problem size. The absolute growth based on the machine utilized to execute the program

Explain dijkstra''s algorithm, Explain Dijkstra's algorithm Dijkstra's ...

Explain Dijkstra's algorithm Dijkstra's algorithm: This problem is concerned with finding the least cost path from an originating node in a weighted graph to a destination node

C, padovan string

padovan string

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd