If are does not want anyone else to read or write to a file named datfile,except through a program in a file filex,then he may use

Related MCQs

• If one doesn't want anyone else to read or write to a file named datfile, except through a program in a file filex , then he may use
• Which of these commands will set the permissions on file textfile to read and write for the owner, read for the group, and nothing for everyone else?
• Below is the codeint main() { int fd1, fd2; struct stat buff1, buff2; fd1 = open(“1.txt”, O_RDWR); fd2 = open(“2.txt”, O_RDWR | O_APPEND); lseek(fd1, 10000, SEEK_SET); write(fd1, “abcdefghij”, 10); write(fd2, “abcdefghij”, 10); fstat(fd1, &buff1); fstat(fd2, &buff2); printf(“ %d %d”, buff1.st_size, buff2.st_size); return 0; } Before running the program, the file 1.txt and 2.txt size is 20 each. What is the output?
• rom where would the read statement read if the following statements were executed? exec < file1 exec < file2 exec < file3 read line
• If a file has read and write permissions for the owner, then the octal representation of the permissions will be
• You want to add files to a previously created tar file. You want to replace existing files with newer files, how can you do this ?
• What is the output of the following program? x = 3; y = 5; z = 10; if [( $x -eq 3 ) -a ( $y -eq 5 -o $z -eq 10 )] then echo $x else echo $y fi
• Which command is used to assign read- write permission to the owner?
• ode snippets str1=”45678\n” str2=”123\n” f1 = fopen(file1,RDWR,RWX) f2 = fopen(file1,RDWR,RWX) write(f1,str1,len_str1) write(f2,str2,len_str2) o/p:
• Which of the following commands is used to save the output of the who command in a file named user.lst, as well as display it?