A systems administrator has finished building a new feature for the monitoring software in a separate Git branch.
Which of the following is the BEST method for adding the new feature to the software's master branch?

• A.Merge the changes from the feature branch to the master branch.
• B.Save the changes to the master branch automatically with each Git commit.
• C.Clone the feature branch into the master branch.
• D.Pull the changes from the feature branch into the master branch.

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Joe, a user, reports there is data missing after a reboot of the system he is using. The data he was working on was located in /opt/data/user1. A Linux administrator runs the following commands and receives the resulting output.

Which of the following should the administrator perform to resolve the issue?

• A.The administrator can conclude Joe has been using the wrong folder and should be using /opt/data/ user2.
• B.The administrator can conclude the data is gone from the system and needs to be restored from a backup.
• C.The administrator can conclude the drive is not mounted properly and should be remounted.
• D.The administrator can conclude Joe no longer has permissions to his data and needs to change the data ownership to Joe.

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A new HTTPS web service is being deployed on a server. Which of the following commands should the Linux administrator use to ensure traffic is able to flow through the system firewall to the new service?

• A.iptables -A INPUT -p tcp --dport 443 -j ACCEPT
• B.iptables -I OUTPUT -p tcp --sport 443 -j ACCEPT
• C.iptables -A OUTPUT -p tcp --dport 443 -j ACCEPT
• D.iptables -I INPUT --dport 443 -j ACCEPT

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A new IO card has been added to the security server to log the opening and closing of the main entrance. A
switch is attached, so the interface card returns a 1 when the door is opened and a 0 when the door is closed.
Which of the following describes the Linux device to which this switch is attached?

• A./dev/gpio
• B./dev/tty0
• C./dev/sg0
• D./dev/port

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A Linux administrator needs every new file created on a directory to maintain the group permissions of the same directory. Which of the following commands would satisfy this requirement?

• A.chmod o+s <directory>
• B.chmod u+s <directory>
• C.chmod +s <directory>
• D.chmod g+s <directory>

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