Given numPQueue: 29, 38, 76 What does Peek(numPQueue) return? Ex: 100 After the following operations: Enqueue(numPQueue, 89) Enqueue(numPQueue, 84) Peek(numPQueue) Dequeue(numPQueue) What is numPQueue? Ex: 1, 2, 3 What does GetLength (numPQueue) return? Ex: 1
Given numPQueue: 29, 38, 76 What does Peek(numPQueue) return? Ex: 100 After the following operations: Enqueue(numPQueue, 89) Enqueue(numPQueue, 84) Peek(numPQueue) Dequeue(numPQueue) What is numPQueue? Ex: 1, 2, 3 What does GetLength (numPQueue) return? Ex: 1
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:### Priority Queue Example
Given `numPQueue`: 29, 38, 76
#### Understanding the Functions
1. **Peek(numPQueue)**
- This function returns the smallest element in the priority queue without removing it.
**Example Usage**:
- `Ex: 100` (Note: Here `100` is just a placeholder example value).
#### Operations to Perform
After performing the following operations on the queue:
- `Enqueue(numPQueue, 89)`
- `Enqueue(numPQueue, 84)`
- `Peek(numPQueue)`
- `Dequeue(numPQueue)`
#### Questions
1. **What is numPQueue?**
- Provide the updated state of the queue after performing all the operations listed above.
- **Example Input**: `Ex: 1, 2, 3` (Note: This is a placeholder example format).
2. **What does GetLength(numPQueue) return?**
- This function returns the number of elements currently in the priority queue.
- **Example Input**: `Ex: 1` (Note: This is a placeholder example format).
#### Interactive Elements
- **Check Button**: Clicking this button will check the answers you have provided.
- **Next Button**: Clicking this button will proceed to the next question or operation.
#### Detailed Explanation of Diagrams
Below the questions, there's a graphical representation of the priority queue:
- **Queue Visualization**:
- The queue is visually represented with numbered sections indicating the positions of elements.
- In the image, positions 1 and 2 are shaded, showing that they currently hold elements.
- Position 3 is explicitly highlighted, suggesting it might be the current position of focus or the next position to be filled.
- The numbers within the boxes represent the sequence or position in the queue (e.g., 1, 2, 3).
This structure helps in visualizing the actual placement and order of operations in the priority queue.
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