diff --git a/README.md b/README.md
index 84290d7..a18402e 100644
--- a/README.md
+++ b/README.md
@@ -1,19 +1,14 @@
# DevOps Interview Questions
+:information_source: This repository contains interview questions on various DevOps and SRE related topics
-:information_source: This repository contains interview questions on various DevOps related topics
-
-:bar_chart: There are currently **485** questions
-
-:warning: You don't need to know how to answer all the questions in this repo. DevOps is not about knowing all :)
+:bar_chart: There are currently **500** questions
:thought_balloon: Different interviewers focus on different things. Some will focus on your resume while others might focus on scenario questions or specific technical questions. I tried to cover different types of questions for you to practice and test your skills
-:page_facing_up: Some questions are also relevant to similar roles like SRE and Production Engineer
-
:pencil: You can add more questions & answers by submitting pull requests :) You can read more about it [here](CONTRIBUTING.md)
-:cn: You can find the [中文](README-ZH_CN.md) chinese translation right [here](README-zh_CN.md)
+:cn: You can find a [中文](README-ZH_CN.md) Chinese translation right [here](README-zh_CN.md)
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@@ -679,6 +674,10 @@ TCP establishes a connection between the client and the server to guarantee the
What is MTU?
+
+True or False? ping is using UDP because it doesn't care about reliable connection
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+
What is SDN?
@@ -867,6 +866,10 @@ Using the `chmod` command.
3. Check I/O stats with iostat
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+How to debug binaries?
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+
What is a Linux kernel module and how do you load a new module?
@@ -3278,6 +3281,10 @@ the pseudo table to retrieve the sum of the prices spent by each customer, then
Explain "Privilege Restriction"
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+How HTTPS is different from HTTP?
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+
What types of firewalls are there?
@@ -3319,6 +3326,46 @@ the pseudo table to retrieve the sum of the prices spent by each customer, then
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+Explain "Format String Vulnerability"
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+
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+Explain "Buffer Overflow"
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+
+
+Explain DMZ
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+
+
+Explain TLS
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+
+
+What is CSRF? How to handle CSRF?
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+
+
+Explain HTTP Header Injection vulnerability
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+
+
+What security sources are you using to keep updated on latest news?
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+
+
+What TCP and UDP vulnerabilities are you familiar with?
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+
+
+Do using VLANs contribute to network security?
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+
+
+What are some examples of security architecture requirements?
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+
##### Containers
@@ -3336,6 +3383,14 @@ the pseudo table to retrieve the sum of the prices spent by each customer, then
Explain MAC flooding attach
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+What is "Diffie-Hellman key exchange" and how does it work?
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+
+
+Explain "Forward Secrecy"
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+
## Puppet