LPI Linux Level 1 Exam 102 Question

Hi all, there are some multiple choice question. I am going to exam. please help, Thank you very much! I only need answer is ok, no need explanation. Thanks!

1. Which command allows you to make a shell variable visible to subshells? A. export $VARIABLE B. export VARIABLE C. set $VARIABLE D. set VARIABLE E. env VARIABLE

2. Which command should be entered to print and then delete the file, foobar.txt? A lpr -o delete foobar.txt B lpr -d foobar.txt C lpr -r foobar.txt D lpr -o remove foobar.txt

3. What is the purpose of the Bash built-in export command? A To allow disks to be mounted remotely. B To run a command as a process in a sub-shell. C To make the command history available to sub-shell D To setup enviroment variables for applications. E To share NFS paribreastion for use by other system on the network.

4. you have script called logoutusers which will log out inactive users every hour between the hours of 6 p.m. and 7 a.m., Monday through Friday. Choose the best option. A. 00 18-07 * * 1-5 logoutusers B. 00 6PM-7AM * * Mon-Friday logoutusers C. * 6-7 * * 1-5 logoutusers D. * 18,19,20,21,22,23,0,1,2,3,4,5,6,7 * * 1-5 logoutusers