Question

Explain various memory protection mechanisms used in operating systems

Answer 1

Memory protection is a way to control memory access rights on a computer, and is a part of most modern instruction set architectures and operating systems. The main purpose of memory protection is to prevent a process from accessing memory that has not been allocated to it. This prevents a bug or malware within a process from affecting other processes, or the operating system itself. An attempt to access unowned memory results in a hardware fault, called a segmentation fault or storage violation exception, generally causing abnormal terminationof the offending process. Memory protection for computer securityincludes additional techniques such as address space layout randomizationand executable space protection.