diff --git a/README.md b/README.md
index 9ffd10d..493d6f7 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
:information_source: This repository contains interview questions on various DevOps related topics
-:bar_chart: There are currently **271** questions
+:bar_chart: There are currently **282** questions
:warning: You don't need to know how to answer all the questions in this repo. DevOps is not about knowing all :)
@@ -538,7 +538,11 @@ CSMA/CD algorithm:
#### :baby: Beginner
-Explain what each of the following commands does and given an example on how to use it:
+What is your experience with Linux? When you can set up an application on multiple operating systems, on which one would you prefer to set it up and why?
+
+
+
+Explain what each of the following commands does and give an example on how to use it:
* ls
* rm
@@ -565,6 +569,10 @@ With cron, tasks are scheduled using the following format:
The tasks are stored in a cron file.
+
+Have you scheduled tasks in the past? What kind of tasks?
+
+
##### Permissions
@@ -577,6 +585,10 @@ The tasks are stored in a cron file.
* 777
* 644
* 750
+
+777 - means you are lazy
+644 - owner has read+write permissions and everyone else can only read
+750 - owner can do anything, group can read and execute and others can do nothing
@@ -591,27 +603,35 @@ The tasks are stored in a cron file.
On a system which uses systemd, how would display the logs?
-
-What commands are you using for troubleshooting issues? specifically:
+##### Debugging
- * Disk issues
- * Memory, CPU issues
- * Networking issues
+
+What are you using for troubleshooting and debugging network issues?
+
+dstat -t is great for identifying network and disk issues.
-What is the difference between Linux and Unix?
+What are you using for troubleshooting and debugging disk issues?
+
+dstat -t is great for identifying network and disk issues.
-Are you familiar with the following process monitoring tools and commands?:
+What are you using for troubleshooting and debugging networking issues?
+
- * top
- * ps
- * htop
- * atop
- * lsof
-Can you explain when are you using each one?
+
+What are you using for troubleshooting and debugging process issues?
+
+strace is great for understanding what your program does. It prints every system call your program executed.
+
+
+
+You get a call saying "my system is slow" - how would you deal with it?
+
+1. Check with top if anything consumes your CPU or RAM.
+2. Run dstat -t to check if it's related to disk or network.
@@ -720,6 +740,17 @@ As to why, since some commands/processes can take a lot of time to finish
execution or run forever
+
+Are you familiar with the following process monitoring tools and commands?:
+
+ * top
+ * ps
+ * htop
+ * atop
+ * lsof
+Can you explain when are you using each one?
+
+
What signal is used when you run 'kill '?
@@ -777,7 +808,7 @@ Zombie
-What does strace does?
+What strace does?
@@ -890,11 +921,23 @@ While an A record points a domain name to an IP address, a PTR record does the o
#### :star: Advanced
-What happens in the OS when you execute ls?
+What happens when you execute ls? provide a detailed answer
-How processes are being created?
+Can you describe how processes are being created?
+
+
+
+What's happening in the following code?:
+
+```
+open("/my/file") = 5
+read(5, "file content")
+```
+
+
+those are system calls for reading the file /my/file and 5 is the file descriptor number.
##### Network
@@ -1238,14 +1281,41 @@ You use it this way: variable “my_var” {}
-What is "tainted resource"?
+What is a "tainted resource"?
+
+It's a resource which was successfully created but failed during provisioning. Terraform will fail and mark this resource as "tainted".
+
+
+
+What terraform taint does?
+
+
+
+What types of variables are supported in Terraform?
+
+Strimg
+Integer
+Map
+List
+
+
+
+What are output variables and what terraform output does?
+
+
+
+Explain Modules
+
+
+
+What is the Terraform Registry?
#### :star: Advanced
-Explain "remote state". When would you use it and how?
+Explain "Remote State". When would you use it and how?