After Each Statement Executes What Are The Results

After Each Of The Following Statements Executes What Are The Contents

After each of the following statements executes, what are the contents of the queue? Please explain. QueueInterface myQueue = new LinkedQueue(); myQueue.enqueue("Jane"); myQueue.enqueue("Jess"); myQueue.enqueue("Jon"); myQueue.enqueue(myQueue.dequeue()); myQueue.enqueue(myQueue.getFront()); myQueue.enqueue("Jim"); String name = myQueue.dequeue(); myQueue.enqueue(myQueue.getFront());

After each of the following statements executes, what are the contents of the deque? Please explain. DequeInterface myDeque = new LinkedDeque(); myDeque.addToFront("Jim"); myDeque.addToFront("Jess"); myDeque.addToBack("Jen"); myDeque.addToBack("Josh"); String name = myDeque.removeFront(); myDeque.addToBack(name); myDeque.addToBack(myDeque.getFront()); myDeque.addToFront(myDeque.removeBack()); myDeque.addToFront(myDeque.getBack());

After each of the following statements executes, what are the contents of the priority queue? Please explain. PriorityQueueInterface myPriorityQueue = new LinkedPriorityQueue(); myPriorityQueue.add("Jim"); myPriorityQueue.add("Josh"); myPriorityQueue.add("Jon"); myPriorityQueue.add("Jane"); String name = myPriorityQueue.remove(); myPriorityQueue.add(name); myPriorityQueue.add(myPriorityQueue.peek()); myPriorityQueue.add("Jose"); myPriorityQueue.remove(); It is OK to assume that the alphabetically earliest string has the highest priority.

Paper For Above instruction

This paper provides a comprehensive analysis of the contents of various data structures—queues, deques, and priority queues—after executing specific sequences of operations. Understanding the dynamic behavior of these structures is fundamental in computer science, as they underpin many algorithms and systems. Each data structure's unique properties influence how elements are added, removed, and ordered, affecting the overall state at each step. This analysis offers insight into their behavior in practical scenarios, emphasizing how sequence operations impact their contents.

Analysis of Queue Operations

A queue follows the First-In-First-Out (FIFO) principle, meaning the first element added is the first to be removed. Initially, the queue starts empty with myQueue. When "Jane" is enqueued, it becomes the first element. Subsequent enqueues with "Jess" and "Jon" add elements to the back of the queue, resulting in the sequence: ["Jane", "Jess", "Jon"]. The first operation, myQueue.dequeue(), removes "Jane," leaving ["Jess", "Jon"], which is then enqueued again, resulting in ["Jess", "Jon", "Jane"]. The myQueue.getFront() retrieves "Jess" without removing it, so enqueuing it again maintains the order, resulting in ["Jess", "Jon", "Jane", "Jess"]. Enqueuing "Jim" adds it to the back, leading to ["Jess", "Jon", "Jane", "Jess", "Jim"]. Dequeuing the front removes "Jess," leaving ["Jon", "Jane", "Jess", "Jim"]. The variable name stores this dequeued value, "Jess". Re-enqueueing myQueue.getFront() (which is "Jon") adds it at the back, resulting in ["Jon", "Jane", "Jess", "Jim"].

Final Queue Contents: ["Jon", "Jane", "Jess", "Jim"]

Analysis of Deque Operations

A deque (double-ended queue) allows insertion and removal from both ends. Initially, myDeque is empty. Adding "Jim" to the front results in ["Jim"]. Adding "Jess" to the front changes the order to ["Jess", "Jim"]. Adding "Jen" and "Josh" to the back results in ["Jess", "Jim", "Jen", "Josh"]. Removing the front element retrieves "Jess" and leaves ["Jim", "Jen", "Josh"]. Storing this in name. Adding this name ("Jess") to the back updates the deque to ["Jim", "Jen", "Josh", "Jess"]. Adding the front element of the deque ("Jim") to the back results in ["Jim", "Jen", "Josh", "Jess", "Jim"]. Removing the back element ("Jim") and adding it to the front yields ["Jim", "Jen", "Josh", "Jess"]. Then, adding the current back element ("Jess") to the front results in ["Jess", "Jim", "Jen", "Josh"].

Final Deque Contents: ["Jess", "Jim", "Jen", "Josh"]

Analysis of Priority Queue Operations

In a priority queue, elements are ordered based on their priority, here assumed to be alphabetically earliest string as highest priority. Initially, "Jim", "Josh", "Jon", and "Jane" are added. Enqueuing results in the queue ordered by priority: ["Jane", "Jim", "Jon", "Josh"]. Removing the highest priority ("Jane") leaves ["Jim", "Jon", "Josh"], with name storing "Jane". Re-adding "Jane" restores the previous state. Adding myPriorityQueue.peek() re-inserts the highest-priority element ("Jane") since peek returns "Jane" without removal. Adding "Jose" introduces a new element with higher priority than "Jim" but lower than "Jane", leading to ["Jane", "Jose", "Jim", "Jon", "Josh". Removing removes now "Jane", leaving ["Jose", "Jim", "Jon", "Josh"]. The exact order depends on the internal implementation and comparison logic, but assuming standard lexicographical order, the queue maintains the priority ordering after each operation.

Final Priority Queue Contents: ["Jose", "Jim", "Jon", "Josh"]

Conclusion

The sequential operations across the queue, deque, and priority queue demonstrate fundamental behavior patterns essential to understanding data structures. Queues maintain order based on insertion time, deques allow flexible insertion/removal from both ends, and priority queues order elements based on their priority criteria. Recognizing these behaviors in controlled sequences enhances comprehension of their roles in algorithm design and system implementation.

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