Multilevel queue scheduling in Operating Systems - Mini Project: Build & Apply

Multilevel Queue Scheduling

📖 Scenario: You are learning about how an operating system manages different types of processes using multilevel queue scheduling. This method divides processes into separate queues based on their characteristics, such as priority or type, and schedules them accordingly.

🎯 Goal: Build a simple representation of multilevel queue scheduling by creating queues for different process types, setting priority levels, assigning processes to queues, and defining the scheduling order.

📋 What You'll Learn

Create separate queues for different process types

Define priority levels for each queue

Assign processes to the correct queues

Set the scheduling order based on queue priority

💡 Why This Matters

🌍 Real World

Operating systems use multilevel queue scheduling to efficiently manage different types of processes, such as system tasks, user interactions, and background jobs.

💼 Career

Understanding multilevel queue scheduling is important for roles in system administration, software development, and IT infrastructure where process management and optimization are key.

1

Create process queues

Create three empty lists named system_queue, interactive_queue, and batch_queue to represent different process types in multilevel queue scheduling.

Operating Systems

# Create empty lists for system_queue, interactive_queue, and batch_queue
# Your code here

Need a hint?

Use empty square brackets [] to create empty lists for each queue.

2

Define queue priorities

Create a dictionary called queue_priority that assigns priority numbers to each queue: system_queue with priority 1, interactive_queue with priority 2, and batch_queue with priority 3.

Operating Systems

system_queue = []
interactive_queue = []
batch_queue = []
# Create queue_priority dictionary with priorities for each queue
# Your code here

Need a hint?

Use curly braces {} to create a dictionary and assign the correct priority numbers to each queue name as strings.

3

Assign processes to queues

Add the following processes to their respective queues: add 'P1' and 'P2' to system_queue, 'P3' and 'P4' to interactive_queue, and 'P5' to batch_queue.

Operating Systems

system_queue = []
interactive_queue = []
batch_queue = []
queue_priority = {
    'system_queue': 1,
    'interactive_queue': 2,
    'batch_queue': 3
}
# Add processes to the correct queues
# Your code here

Need a hint?

Use square brackets [] with process names as strings separated by commas to add processes to each list.

4

Define scheduling order

Create a list called scheduling_order that contains the queue names 'system_queue', 'interactive_queue', and 'batch_queue' in order of their priority from highest to lowest.

Operating Systems

system_queue = ['P1', 'P2']
interactive_queue = ['P3', 'P4']
batch_queue = ['P5']
queue_priority = {
    'system_queue': 1,
    'interactive_queue': 2,
    'batch_queue': 3
}
# Create scheduling_order list based on queue priorities
# Your code here

Need a hint?

Use a list with queue names as strings ordered by their priority number, starting with 1.