This document presents an introduction to system calls and APIs, defining system calls as methods for programs to request services from an operating system's kernel, while APIs provide tools for software communication. It outlines various types of system calls, including process control, file management, and device management. The document distinguishes between system calls, which are low-level and OS-specific, and APIs, which are higher-level and facilitate interaction among software components.

1. System Call and API
Understanding the Basics
Presented by: [Your Name]
Date: [Presentation Date]

2. Introduction to System Calls
• Definition:
• A system call is a programmatic way in which a
computer program requests a service from the
operating system's kernel.
• Purpose:
• Provides an interface between user programs
and the operating system.

3. Types of System Calls
• Process Control:
• fork(), exec(), exit()
• File Management:
• open(), close(), read(), write()
• Device Management:
• ioctl(), read(), write()

4. Introduction to APIs
• Definition:
• API (Application Programming Interface) is a
set of tools and protocols for building software
and applications.
• Purpose:
• Allows different software systems to
communicate with each other.

5. System Call vs. API
• System Call:
• - Low-level, interacts directly with the OS
kernel
• - Specific to an operating system
• - Examples: fork(), exec(), read()
• API:
• - Higher-level, used to interact with software
components