Context switching in Operating Systems - Mini Project: Build & Apply

Understanding Context Switching in Operating Systems

📖 Scenario: Imagine a computer running multiple programs at the same time. The operating system needs to switch between these programs quickly to give the appearance that they run simultaneously. This process is called context switching.

🎯 Goal: Build a simple step-by-step explanation of context switching by creating a list of running programs, setting a current program, switching context to another program, and finally showing the updated current program.

📋 What You'll Learn

Create a list called programs with three program names: 'Calculator', 'Text Editor', and 'Web Browser'

Create a variable called current_program and set it to the first program in the programs list

Write code to switch current_program to the next program in the programs list

Add a final step to confirm the current_program is updated to the new program

💡 Why This Matters

🌍 Real World

Context switching allows computers to run many programs seemingly at the same time by quickly switching between them.

💼 Career

Understanding context switching is important for roles in system administration, software development, and IT support to optimize and troubleshoot multitasking systems.

1

Create the list of running programs

Create a list called programs with these exact program names: 'Calculator', 'Text Editor', and 'Web Browser'.

Operating Systems

# Create the list of programs
# Your code here

Need a hint?

Use square brackets [] to create a list and separate items with commas.

2

Set the current running program

Create a variable called current_program and set it to the first program in the programs list.

Operating Systems

programs = ['Calculator', 'Text Editor', 'Web Browser']
# Set current_program to the first program in programs
# Your code here

Need a hint?

Use index 0 to get the first item from the list.

3

Switch context to the next program

Change the current_program variable to the next program in the programs list, which is the second item.

Operating Systems

programs = ['Calculator', 'Text Editor', 'Web Browser']
current_program = programs[0]
# Switch current_program to the second program in programs
# Your code here

Need a hint?

Use index 1 to get the second item from the list.

4

Confirm the current program after context switch

Add a comment line that states the current_program is now 'Text Editor' after the context switch.

Operating Systems

programs = ['Calculator', 'Text Editor', 'Web Browser']
current_program = programs[1]
# Add a comment confirming current_program is 'Text Editor'
# Your code here

Need a hint?

Use a comment starting with # to add your note.