diff --git a/README.md b/README.md
index bce9774..5d92185 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
:information_source: This repository contains interview questions on various DevOps related topics
-:bar_chart: There are currently **151** interview questions
+:bar_chart: There are currently **161** interview questions
:warning: Some answers might be only partial and shouldn't be used as they are in interviews
@@ -424,6 +424,10 @@ CSMA/CD algorithm:
What is IPv6? Why should we consider using it if we have IPv4?
+
+What is VLAN?
+
+
What is MTU?
@@ -442,7 +446,8 @@ CSMA/CD algorithm:
#### :baby: Beginner
-Explain what each of the following commands does and given an example on how to use it
+Explain what each of the following commands does and given an example on how to use it:
+
* ls
* rm
* rmdir (can you achieve the same result by using rm?)
@@ -472,6 +477,7 @@ The tasks are stored in a cron file.
What does the following permissions mean?:
+
* 777
* 644
* 750
@@ -483,6 +489,7 @@ The tasks are stored in a cron file.
What commands are you using for troubleshooting issues? specifically:
+
* Disk issues
* Memory, CPU issues
* Networking issues
@@ -500,6 +507,10 @@ The tasks are stored in a cron file.
What is KVM?
+
+Explain redirection
+
+
What is an exit code? What exit codes are you familiar with?
@@ -536,6 +547,27 @@ soft links can be created between different file systems while
hard link can be created only within the same file system.
+
+What RAID is used for? Can you explain the differences between RAID 0, 1, 5 and 10?
+
+
+
+Fix the following commands:
+
+ * sed "s/1/2/g' /tmp/myFile
+ * find . -iname \*.yaml -exec sed -i "s/1/2/g" {} ;
+
+
+
+Explain what is stored in each of the following paths and if there is anything unique about it:
+
+ * /tmp
+ * /var/log
+ * /bin
+ * /proc
+ * /usr/local
+
+
How to run a process in the background and why to do that in the first place?
@@ -615,11 +647,17 @@ related to the file like its size, owner, permissions, etc.
-DNS: What is A record?
+DNS: What is a "A record"?
-DNS: What is MX record?
+DNS: What is a PTR?
+
+While an A record points a domain name to an IP address, a PTR record does the opposite and resolves the IP address to a domain name.
+
+
+
+DNS: What is a MX record?
@@ -635,6 +673,22 @@ related to the file like its size, owner, permissions, etc.
sed "s/\s*\w\+\s*$//" file
+
+When you run ip a you see there is a device called 'lo'. What is it and why do we need it?
+
+
+
+What traceroute command does? How it works?
+
+
+
+What is the routing table? How do you view it?
+
+
+
+What are cgroups? In what scenario would you use them?
+
+
How to create a file of a certain size?
@@ -963,7 +1017,7 @@ Swarm management which means you can create new swarms in Docker Cloud.
-How do you create users?
+How do you create users? Where user information is stored?
@@ -1113,7 +1167,7 @@ is currently pointing at.
-details>
+
You would like to move forth commit to the top. How would you achieve that?
Using git rebase> command