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:information_source:  This repository contains interview questions on various DevOps and SRE related topics
:bar_chart:  There are currently **541** questions
:bar_chart:  There are currently **551** questions
:books:  To learn more about DevOps check the resources in [DevOpsBit.com](https://devopsbit.com)
@ -666,6 +666,10 @@ CSMA/CD algorithm:
<summary>What is a proxy? How it works? What do we need it for?</summary><br><b>
</b></details>
<details>
<summary>What is TCP? How it works? What is the 3 way handshake?</summary><br><b>
</b></details>
<details>
<summary>What is the difference between TCP and UDP?</summary><br><b>
@ -673,11 +677,15 @@ TCP establishes a connection between the client and the server to guarantee the
</b></details>
<details>
<summary>Explain "default gateway"</summary><br><b>
<summary>True or False? TCP is better than UDP</summary><br><b>
</b></details>
<details>
<summary>How TCP works? What is the 3 way handshake?</summary><br><b>
<summary>What TCP/IP protocols are you familiar with?</summary><br><b>
</b></details>
<details>
<summary>Explain "default gateway"</summary><br><b>
</b></details>
<details>
@ -728,6 +736,18 @@ TCP establishes a connection between the client and the server to guarantee the
<summary>What is NAT? How it works?</summary><br><b>
</b></details>
<details>
<summary>What is latency?</summary><br><b>
</b></details>
<details>
<summary>What is bandwidth?</summary><br><b>
</b></details>
<details>
<summary>Which factors affect network performances</summary><br><b>
</b></details>
<a name="network-advanced"></a>
#### :star: Advanced
@ -767,6 +787,14 @@ TCP establishes a connection between the client and the server to guarantee the
<summary>Explain Spine & Leaf</summary><br><b>
</b></details>
<details>
<summary>What is Network Congestion? What can cause it?</summary><br><b>
</b></details>
<details>
<summary>What can you tell me about UDP packet format? What about TCP packet format? How is it different?</summary><br><b>
</b></details>
<details>
<summary>Using Hamming code, what would be the code word for the following data word 100111010001101?</summary><br><b>
@ -1068,7 +1096,7 @@ Soft links can be created between different file systems while hard link can be
</b></details>
<details>
<summary>What is chroot?</summary><br><b>
<summary>What is chroot? In what scenarios would you consider using it?</summary><br><b>
</b></details>
##### Processes
@ -1387,7 +1415,7 @@ These system calls are reading the file <code>/my/file</code> and 5 is the file
</b></details>
<details>
<summary>What are cgroups? In what scenario would you use them?</summary><br><b>
<summary>What are cgroups?</summary><br><b>
</b></details>
<details>
@ -3545,7 +3573,7 @@ the pseudo table to retrieve the sum of the prices spent by each customer, then
</b></details>
<details>
<summary>Do you think open source project is more secured when compared to a proprietary software?</summary><br><b>
<summary>What is DNS Spoofing? How to prevent it?</summary><br><b>
</b></details>
<details>
@ -3811,6 +3839,18 @@ While an A record points a domain name to an IP address, a PTR record does the o
<summary>Is DNS using TCP or UDP?</summary><br><b>
</b></details>
<details>
<summary>What is Round Robin DNS?</summary><br><b>
</b></details>
<details>
<summary>What is DNS Record TTL? Why do we need it?</summary><br><b>
</b></details>
<details>
<summary>What is a zone? What types of zones are there?</summary><br><b>
</b></details>
## General
Although the following questions are not DevOps related, they are still quite common so it's better to prepare for them as well.