What is "shell program"? What is the reason for using a shell program? How do you make a shell(.sh) file executable? What is the difference between creating a shell program and regular program? What is the difference between running program with and without exec? What does the ps command do, and how can it be useful for you? Why do we need 3 sets of file permission for a file or folder?

Auser is given read permission to a file stored on an ntfs-formatted volume. the file is then copied to a folder on the same ntfs-formatted volume where the user has been given full control permission for that folder. when the user logs on to the computer holding the file and accesses its new location via a drive letter, what is the user's effective permission to the file? a. read b. full control c. no access d. modify e. none of the above

Barbara is interested in pursuing a career in the science and math pathway. which qualifications will her reach that goal? a.an advanced knowledge of physics and math b.an advanced knowledge of engineering and math c. an advanced knowledge of physics and robotics an d. advanced knowledge of machinery and math

How can smart devices benefit businesses, organizations, and social communities in the global marketplace?