Add questions and answers

README.md

@@ -2542,10 +2542,28 @@ For example:
   * cp
   * mkdir
 </summary><br><b>
+
+  * touch - update file's timestamp. More commonly used for creating files
+  * ls - listing files and directories
+  * rm - remove files and directories
+  * cat - create, view and concatenate files
+  * cp - copy files and directories
+  * mkdir - create directories
 </b></details>
 
 <details>
-<summary>Some of the commands in the previous question can be run with the -r/--recursive flag. What does it do?</summary><br><b>
+<summary>Some of the commands in the previous question can be run with the -r/-R flag. What does it do? Give an example when to use it</summary><br><b>
+
+The -r (or -R in some commands) flag allows user to run a certain command recursively. For example, listing all the files under the following tree is possible when done recursively (`ls -R`):
+
+/dir1/
+  dir2/
+    file1
+    file2
+  dir3/
+    file3
+
+To list all the files, one can run `ls -R /dir1`
 </b></details>
 
 <details>
@@ -3236,6 +3254,12 @@ False
 True
 </b></details>
 
+<details>
+<summary>True or False? Directories always have by minimum 2 links</summary><br><b>
+
+True.
+</b></details>
+
 <details>
 <summary>What happens when you delete the original file in case of soft link and hard link?</summary><br><b>
 </b></details>
@@ -4837,7 +4861,7 @@ HCL stands for Hashicorp Configuration Language. It is the language Hashicorp ma
 <details>
 <summary>What <code>terraform.tfstate</code> file is used for?</summary><br><b>
 
-It keeps track of the IDs of created resources so that Terraform knows what it is managing.
+It keeps track of the IDs of created resources so that Terraform knows what it's managing.
 </b></details>
 
 <details>
@@ -9062,10 +9086,15 @@ as key-value pair, document-oriented, etc.
 
 <details>
 <summary>What is OpenShift?</summary><br><b>
+
+OpenShift is a container orchestration platform based on Kubernetes.<br>
+It can be used for deploying applications while having minimal management overhead.
 </b></details>
 
 <details>
 <summary>How OpenShift is related to Kubernetes?</summary><br><b>
+
+It's built on top of Kubernetes while defining its own custom resources in addition to the built ones.
 </b></details>
 
 <details>
@@ -9074,6 +9103,15 @@ as key-value pair, document-oriented, etc.
 False. OpenShift is a PaaS (platform as a service) solution.
 </b></details>
 
+## OpenShift - Architecture
+
+<details>
+<summary>What types of nodes OpenShift has?</summary><br><b>
+
+- Workers: Where the end-user applications are running
+- Masters: Responsible for managing the cluster
+</b></details>
+
 ## OpenShift - Images
 
 <details>
@@ -10182,6 +10220,10 @@ Authentication is the process of identifying whether a service or a person is wh
 Authorization is the process of identifying what level of access the service or the person have (after authentication was done)
 </b></details>
 
+<details>
+<summary>What it means to be "FIPS compliant"?</summary><br><b>
+</b></details>
+
 <details>
 <summary>How do you manage sensitive information (like passwords) in different tools and platforms?</summary><br><b>
 </b></details>