21⟩ How do you rename file "new" to file "old"? a) mv new old b) move new old c) cp new old d) rn new old
a) mv new old
Linux Operating System Management
Home Operating System Linux Linux Operating System Management
“Linux OS Management frequently Asked Questions by expert members with experience in Linux Operating System Management. These questions and answers will help you strengthen your technical skills, prepare for the new job test and quickly revise the concepts”
99 Linux Operating System Management Questions And Answers
22⟩ If one of the thread in multi-threaded process is blocked on an I/O, which of the following is true? a) The entire process with block if their is no kernel supported threads b) Other threads of the process will continue to execute even if there is no kernel supported threads c) It depends on specific implementatation d) All of the above
a) The entire process with block if their is no kernel supported threads
23⟩ Given a code snippet below? #define PERMS (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH) int main() { int fd1, fd2; umask(0); fd1 = open("file1", O_CREAT | O_RDWR, PERMS) umask(S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); fd2 = open("file2", O_CREAT | O_RDWR, PERMS) return 0; } The newly created files file1 and file2 will have the permissions respectively a) rw-rw-rw- r--- b) r--- rw-rw-rw- c) rw-rw-rw- rw--- d) None of the above
c) rw-rw-rw- rw---
24⟩ What is stored in logfile as per below mentioned code if we execute ./a.out > logfile? int main() { int fd; close(1); fd = open("logfile",O_RDWR, 0744); write(fd, "Hello", 5); printf("Worldn"); return 0; } a) Hello b) HelloWorld c) World d) None
b) HelloWorld
25⟩ Code snippet (file1 size is 2024) f1 = fopen (file1, RDWR, RWX) lseek(f1,1024,SEEK_SET) write(f1,buf,10) What is offset now. a) 1024 b) 1034 c) 2034 d) 2054
b) 1034
26⟩ Code snippets str1="45678n" str2="123n" f1 = fopen(file1,RDWR,RWX) f2 = dup(f1) write(f1,str1,len_str1) write(f2,str2,len_str2) o/p a) 12378 b) 123(newline)8(newline) c) 123(newline)78(newline) d) 45678(newline)123(newline)
d) 45678(newline)123(newline)
27⟩ For the below mentioned code int main() { int fd; fd = open("logfile", O_CREAT|O_RDWR, 0600); lseek(fd, 5, SEEK_CUR); write(fd, "Hello", 5); return 0; } What is the logfile size now if it's initially was 1024 bytes? a) 5 b) 1024 c) 1029 d) 1034
b) 1024
28⟩ Where can I find the printer in the file structure? a) /etc b) /dev c) /lib d) /printer
b) /dev
29⟩ Which of the following statement is true? a) The cp command will preserve the meta data of the file b) The sort command by default sorts in the numeric order c) The mv command will preserve the meta data of the file d) The command ps will display the filesystem usage
c) The mv command will preserve the meta data of the file
30⟩ Creation of hardlinks that point across partitions a) is allowed only to root user b) Can be done by all users c) The effects are unspecified d) is not allowed
d) is not allowed
31⟩ Which command is used to change permissions of files and directories? a) mv b) chgrp c) chmod d) set
c) chmod
32⟩ If two files on same partition point to the same inode structure they are called a) Soft links b) Hard links c) Alias d) Special files
b) Hard links
33⟩ Deleting a soft-link a) Deletes the destination file b) Deletes both the softlink and the destination file c) Deletes just the softlink d) backup of the destination is automatically created
c) Deletes just the softlink
34⟩ A user creates a link to a file file1 using the following command "ln file1 file2". Which of the following is not true? a) file1 and file2 have the same inode numbers b) The number of links for file1 is displayed as 1 c) The number of links for file1 is displayed as 2 d) The number of links for file2 is displayed as 2
b) The number of links for file1 is displayed as 1
35⟩ How many links are created when we create a directory file? a) 1 b) 2 c) 3 d) 4
b) 2
36⟩ Which among the following allows fast file system recovery? a) Ext2 b) Journaling c) Caching d) Sysfs
b) Journaling
37⟩ There are two hard links to the "file1″ say hl and h2 and a softlink sl. What happens if we deleted the "file1″? a) We will still be able to access the file with hl and h2 but not with sl b) We will not be able to access the file with hl and h2 but with sl c) We will be able to access the file with any of hl, h2 and sl d) We will not be able to access the file with any of hl, h2 and sl
a) We will still be able to access the file with hl and h2 but not with sl
38⟩ By default if any regular file is created, the number of link is displayed as 1? a) True b) False
a) True
39⟩ Which command is used to check filesystem usage in a system? a) mount b) df c) du d) dd
b) df
40⟩ Filesystem for CDROM is a) Ext2 b) Ext3 c) Isofs d) Procfs
c) Isofs
