Linux System Administrator Quiz Set 1 Welcome to Linux System Administrator QUIZ Set 1.Click on Next Button to proceed. 1. Which of the following strings will not be matched by the regular expression 'ab+c'? ac abbbc abbc2. Which command will show all of your block devices, such as hard disks, even if they aren't mounted? lsblk blkps psblk3. Which SQL command is used to remove a row of data in a database table? DROP FROM REMOVE FROM DELETE FROM4. What does telinit 6 do? Shuts down the system. Powers off the system. Reboots the system.5. What does function a { echo $1; } ; a a b c output? a a b c a b a6. Which command will ensure a file is executable by everyone? chmod 754 /tmp/file chmod a+x /tmp/file chmod u+x,g+x /tmp/file7. How do you determine the return value of a script in your shell? echo $RETURN echo ?? echo $?8. Which environment variable lists the directories that will be searched for applications and command line tools that you are trying to execute? PATH HOME BASH9. Which command will query for the yum package a file belongs to, or was installed by? dpkg -qf filename yum -qf filename rpm -qf filename10. Which utility can you use to send a message to all users currently logged in? init who wall11. How do you temporarily add a directory to your shared library path? Add it to an environment variable called LD_LIBRARY_PATH. Add it to an environment variable called LD_SHARED_DIR. Add it to an environment variable called LD_LIB_PATH.12. Which two of the following commands do the same thing? (Choose 2) init systemd initd telinit13. How do you update your yum package sources? yum update yum download yum upgrade14. Where can you add default options that apply to all entries in grub? /boot/default/grub /etc/default/grub /var/defaults/grub15. What is the systemd equivalent of a runlevel called? Endpoint Target Destination16. What is the main grub configuration file called? menu.cfg grub.lst grub.cfg17. Which SQL command is used to put new data into a database table? UPDATE ADD INSERT18. How do you update your apt package sources? apt-get upgrade apt-get update apt-get dist-upgrade19. What is the full path to the init program? /sbin/init /usr/bin/init /usr/sbin/init20. Where are yum repositories defined? In a directory called /etc/yum.repos.d In a file called /etc/yum.repos.d In a directory called /etc/yum.repos.conf21. Which quantifier will match 0 or 1 occurrence of the preceding element in a regular expression? ? - &22. Which command will show the disk usage of a specified directory? df da du23. Which of the following is not a valid filesystem? ext3 ext5 ext424. Which command will perform a filesystem consistency check and interactive repair? fsck chck chkdsk25. Which virtual filesystem presents information about the kernel subsytems? ext2 tmpfs sysfs26 out of 1Please fill in the comment box below. Email
