diff --git a/README.md b/README.md
index 767a211..a21c582 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 **170** interview questions
+:bar_chart:  There are currently **200** interview questions
 
 :warning:  Some answers might be only partial and shouldn't be used as they are in interviews
 
@@ -495,6 +495,10 @@ The tasks are stored in a cron file.
   * 750</summary><br><b>
 </b></details>
 
+<details>
+<summary>Explain what is setgid, setuid and sticky bit</summary><br><b>
+</b></details>
+
 <details>
 <summary>How to add a new user to the system without providing him the ability to log-in into the system?</summary><br><b>
 </b></details>
@@ -534,6 +538,27 @@ Can you explain when are you using each one?</summary><br><b>
 <summary>Explain redirection</summary><br><b>
 </b></details>
 
+<details>
+<summary>What are wildcards? Can you give an example of how to use them?</summary><br><b>
+</b></details>
+
+<details>
+<summary>What do we grep for in each of the following commands?:
+
+  * <code>grep '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' some_file</code>
+  * <code>grep -E "error|failure" some_file</code>
+  * <code>grep '[0-9]$' some_file</code>
+</summary><br><b>
+
+1. An IP address
+2. The word "error" or "failure"
+3. Lines which end with a number
+</b></details>
+
+<details>
+<summary>Tell me everything you know about Linux boot process</summary><br><b>
+</b></details>
+
 <details>
 <summary>What is an exit code? What exit codes are you familiar with?</summary><br><b>
 
@@ -546,10 +571,6 @@ Each number has different meaning, based on how the application was developed.
 I consider this as a good blog post to read more about it: https://shapeshed.com/unix-exit-codes
 </b></details>
 
-<details>
-<summary>How to grep two strings?</summary><br><b>
-</b></details>
-
 <details>
 <summary>What is the different between a soft link and hard link?</summary><br><b>
 
@@ -560,6 +581,18 @@ soft links can be created between different file systems while
 hard link can be created only within the same file system.
 </b></details>
 
+<details>
+<summary>What do you know about LVM?</summary><br><b>
+</b></details>
+
+<details>
+<summary>Explain the following in regards to LVM:
+
+  * PV
+  * VG
+  * LV</summary><br><b>
+</b></details>
+
 <details>
 <summary>What RAID is used for? Can you explain the differences between RAID 0, 1, 5 and 10?</summary><br><b>
 </b></details>