How do you create configmap cm2 for the file /tmp/values.txt?

• A. oc create configmap cm2 --from-literal KEY=VALUE
• B. oc create configmap cm2 --from-file /tmp/values.txt
• C. oc create configmap cm2 --from-file /tmp/values.txt2
• D. oc create configmap cm2 --from-file /tmp/values.txt

Answer: (D)

Creating a ConfigMap from a file is done with the --from-file option. When you point this option at a real file, the ConfigMap gets a data entry whose key is the file name (values.txt) and whose value is the contents of that file. So for the file at /tmp/values.txt, you end up with a ConfigMap named cm2 that contains a key values.txt with the file’s contents. This is the expected, straightforward way to bring file data into a ConfigMap. Using a literal with --from-literal would place a literal string into the ConfigMap rather than the file’s contents, and referencing a non-existent path would fail because the file can’t be read.