How does Prometheus gather information about monitored hosts and services?

A. It implements the ICMP and SNMP protocols to ping and query remote services.

B. It opens a webhook where monitored applications have to submit various metrics.

C. It uses HTTP to retrieve JSON encoded metrics from the monitored objects.

D. It queries a relational database for metrics written to the database by monitored applications.

E. It runs scripts on the Prometheus server which perform tests and return various metrics.

Which sub command of docker volumen deletes all volumes which are not associated with a container? (Specify ONLY the sub command without any path or parameterr)

A. Docker does not have a specific sub-command to delete all volumes that are not associated with a container. To delete volumes that are not associated with a container, you can use the docker volume ls command to list all volumes and then manually identify the volumes that are not associated with any container. Once identified, you can use the docker volume rm command followed by the volume name or ID to delete each volume individually.

Consider the following log message:

Jun 30 00:36:49 headnode clustermanager{12353}: new node 198.51.100.103

This log message is processed by the following Logstash filter:

Grok {

Match => { "message", "%{SYSLOGBASE} new node %{IPORHOST:node}" } }

Which of the variables below are contained in the resulting event object? (Choose TWO correct answers)

A. node

B. grok

C. SYSLOGBASE

D. IPORHOST

E. message

Which of the following scenarios describes SSL offloading?

A. Requests which arrive in plain text via HHTP are redirected to HTTPS URLs to enforce encryption.

B. To use HTTPS for multiple hosts in the same domain, a wildcard certificate is use don all nodes hosting the services.

C. Requests which arrive encrypted via HTTPS are answered with redirects to HTTP URLs to improve performance.

D. Incoming HTTPS connections are received by a load balancer which handles the encryption and passes decrypted requests on backend servers.

E. The main content of a website is delivered using HTTPS, assets such as images or scripts are delivered using HTTP.

Which git command restores changes that were saved using git stash save?

A. git stash merge

B. git stash revert

C. git stash pop

D. git stash restore

E. git stash commit