Lecture
This lecture introduces the concept of process abstraction in operating systems, emphasizing its importance in managing execution and resources. The instructor explains that a process is a central abstraction that allows multiple programs to run concurrently on a machine with limited resources. The lecture covers the distinction between programs and processes, highlighting that a process is an active instance of a program with its own unique identifier, memory layout, and resources. The instructor details how the operating system creates a process by loading executable code into memory, allocating necessary resources, and initializing input/output tasks. The memory layout of a process is discussed, including the stack, heap, and data segments. The lecture also addresses the need for resource sharing among processes, introducing time sharing and space sharing as strategies for efficient resource management. Finally, the role of the operating system's scheduler in managing process states and scheduling tasks is outlined, setting the stage for further exploration of concurrency and resource management in future lectures.