Explanation : Software safety is quality assurance activity that focuses on hazards that may cause an entire system to fail. It is not related to marketing or input errors or affection of reliability but if system fails all things related to system will be affected. So, option (B) is correct.
Explanation : In UNIX, processes that have finished execution but have not yet had their status collected are known as Zombie processes. A process whose parent process no more exists i.e. either finished or terminated without waiting for its child process to terminate is called an Orphan process. Sleeping process which takes a time value as a parameter that specifies the minimum amount of time in which process set to sleep before resuming execution Stopped processes which stopped their execution. So, option (C) is correct.
Explanation : In Unix operating system, when a process creates a new process using the fork () system call, then memory segments are shared between parent process and child process but stack and heap area are not shared between parent process and child process. So, option (C) is correct.