What is the return value of the system call open if it fails?

is open a function or a system call? (select all valid answers)it’s a kernel routineit’s a library callit’s a system callit’s a function provided by the kernelit’s a function

Which of the following system calls does not return control to the calling point, on termination?Select one:a. execb. forkc. waitd. ioctl

If a process fails, most operating system write the error information to a ______log fileanother running processnew filenone of the mentioned

State what os.close(f) does?Select one:returns an integer telling how close the file pointer is to the end of filecloses the file descriptor fterminates the process fterminates the process f if f is not responding

Each of the following programs opens a file for reading and returns the first line. Which of the two properly closes the file?# Program A:1# Program A2def get_status(file):3  return open(file).readline()# Program B:1# Program B2def get_status(file):3  with open(file) as fp:4    return fp.readline() Program B is safer as it always closes the file on return. Program A is safer as the file close happens implicitly when the temporary file object goes out of scope.Both are identical and correct. Both are incorrect as there is no explicit close anywhere.