Linear Queue Basics
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Questions and Answers

What is the primary characteristic of a queue in terms of customer service?

  • Customers are served based on their arrival time. (correct)
  • Customers are served based on their membership status.
  • Customers are served in a random order.
  • Customers are served based on their ticket number.

    • What defines a queue as an abstract data type?

  • It is characterized by visible implementation details.
  • It has a defined use but lacks real-world implementation.
  • It functions independently of operations performed on it.
  • It is defined by its operations with hidden implementation. (correct)

    • In which scenario would a queue be most appropriately used?

  • Prioritizing urgent tasks over regular tasks.
  • Managing customer transactions in a retail store. (correct)
  • Storing user data for access later.
  • Sorting data for efficient retrieval.

    • Which option best describes the implementation of a queue?

    <p>Its implementation details can vary.</p> Signup and view all the answers

    What is the typical order of operations in a queue?

    <p>First-In-First-Out (FIFO)</p> Signup and view all the answers

    Study Notes

    Linear Queue

    • A queue is a linear data structure
    • It follows the First-In, First-Out (FIFO) principle
    • Insertion (enqueue) happens at the rear end
    • Deletion (dequeue) happens at the front end
    • Elements are homogenous
    • A real-life example is a line or sequence of people or vehicles awaiting their turn
    • Elements are processed in the order they arrive

    Operations on Queue

    • Creation: Initializes an empty queue
    • isEmpty: Checks if the queue is empty
    • isFull: Checks if the queue is full
    • Enqueue: Inserts an element at the rear
    • Dequeue: Deletes an element from the front
    • Peek: Returns the front element without removing it

    Queue Representation with Array

    • Implementation uses an array of fixed size
    • Front index tracks the last deleted element
    • Rear index tracks the last inserted element
    • Initially, both front and rear are -1 (empty queue)

    Queue Representation with Linked List

    • A dynamic structure useful for an arbitrary number of elements
    • Front and rear pointers track the first and last nodes, respectively
    • Insertion happens at the rear
    • Deletion happens at the front

    Circular Queue

    • A linear data structure using the same fixed-size array as a circular buffer
    • When the rear reaches the end, the next insertion continues from index 0
    • Operations are efficient (O(1)) insertion and deletion, avoiding limitations of linear queues with array representation where no more insertions can occur even if there are empty slots in the beginning

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    Related Documents

    Data Structures and Algorithms Lecture (8): Queues - University of Science and Technology

    Description

    This quiz covers the fundamentals of linear queues, focusing on the First-In, First-Out (FIFO) principle and various operations like enqueue and dequeue. It also discusses queue representation using arrays and linked lists, providing a comprehensive understanding of how queues function in data structures.

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