6.2.2. Key Concepts of System Calls

Try these first

1. 1.

   What is the purpose of a system call?

   Hint

   Think about how user programs communicate with the operating system.

2. 2.

   Name one common system call.

   Hint

   Consider the functions used for file operations.

3. 3.

   What is a system call?

   • A function to access user memory
   • A way for user programs to interact with the kernel
   • An operation that only runs in kernel mode

   Hint

   Remember the role of user-space applications.

4. 4.

   True or False: Context switching occurs when transitioning from kernel to user mode.

   • True
   • False

   Hint

   Think about the transitions taking place during system calls.

5. 5.

   Explain the significance of system calls in operating systems and how they enhance application functionality. Use an example.

   Hint

   Think about how operating systems would function without these calls.

6. 6.

   Compare and contrast the operations performed in user mode and kernel mode, showcasing the implications of each.

   Hint

   Focus on the roles each mode play in system protection.