Added 2 Quetions[devops]

Author: bmaca

README.md

@@ -208,6 +208,8 @@ A collection of linux sysadmin/devops interview questions. Feel free to contribu
 * What is a dynamically/statically linked file?
 * What does "configure && make && make install" do?
 * What is puppet/chef/ansible used for?
+* What is Nagios/Zenoss/NewRelic used for?
+* What is the difference between Containers and VMs?
 * How do you create a new postgres user?
 * What is a virtual IP address? What is a cluster?
 * How do you print all strings of printable characters present in a file?
@@ -218,7 +220,6 @@ A collection of linux sysadmin/devops interview questions. Feel free to contribu
 * What's the relationship between continuous delivery and DevOps?
 * What are the important aspects of a system of continous integration and deployment?
 
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 ####[[⬆]](#toc) <a name='fun'>Fun Questions:</a>
 
 * A careless sysadmin executes the following command: ```chmod 444 /bin/chmod ``` - what do you do to fix this?