From a6591df0bdebcaac41bdfea6351a0bba19139b42 Mon Sep 17 00:00:00 2001 From: abregman Date: Mon, 21 Oct 2019 21:50:38 +0300 Subject: [PATCH 1/3] Add puppet questions --- README.md | 65 +++++++++++++++++++++++++++++++++++++++------- images/puppet.png | Bin 0 -> 1106 bytes 2 files changed, 55 insertions(+), 10 deletions(-) create mode 100644 images/puppet.png diff --git a/README.md b/README.md index dc75ecc..52af98b 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 **343** questions +:bar_chart:  There are currently **351** questions :warning:  You don't need to know how to answer all the questions in this repo. DevOps is not about knowing all :) @@ -21,28 +21,29 @@ DevOps
DevOps
Beginner :baby:
Advanced :star: Jenkins
Jenkins
Beginner :baby:
Advanced :star: - AWS
AWS
Beginner :baby:
- Network
Network
Beginner :baby:
Advanced :star: + Git
Git
Beginner :baby:
Advanced :star: Linux
Linux
Beginner :baby:
Advanced :star: - Ansible
Ansible
Beginner :baby:
Advanced :star: + Network
Network
Beginner :baby:
Advanced :star: + Ansible
Ansible
Beginner :baby:
Advanced :star: Terraform
Terraform
Beginner :baby:
Advanced :star: Docker
Docker
Beginner :baby:
- kubernetes
Kubernetes
Beginner :baby:
Python
Python
Beginner :baby:
Advanced :star: - Prometheus
Prometheus
Beginner :baby:
- Git
Git
Beginner :baby:
Advanced :star: Go
Go
Beginner :baby:
- Mongo
Mongo
Beginner :baby:
- OpenShift
OpenShift
Beginner :baby:
Bash
Shell Scripting
Beginner :baby:
Advanced :star: + kubernetes
Kubernetes
Beginner :baby:
+ Prometheus
Prometheus
Beginner :baby:
+ Mongo
Mongo
Beginner :baby:
+ sql
SQL
Beginner :baby:
Advanced :star: + OpenShift
OpenShift
Beginner :baby:
- sql
SQL
Beginner :baby:
Advanced :star: + AWS
AWS
Beginner :baby:
azure
Azure
Beginner :baby:
openstack
OpenStack
Beginner :baby:
security
Security
Beginner :baby:
+ puppet
Puppet
Beginner :baby:
@@ -2353,6 +2354,50 @@ the pseudo table to retrieve the sum of the prices spent by each customer, then What is Privilege Restriction?
+## Puppet + + +#### :baby: Beginner + +
+What is Puppet? How it works?
+
+ +
+Explain Puppet architecture
+
+ +
+Can you compare Puppet to other configuration management tools? Why did you chose to use Puppet?
+
+ +
+Explain the following: + + * Module + * Manifest + * Node
+
+ +
+Explain Facter
+
+ +
+What is MCollective?
+
+ + +#### :baby: Advanced + +
+Do you have experience with writing modules? Which module have you created and for what?
+
+ +
+Explain what is Hiera
+
+ ## Scenarios diff --git a/images/puppet.png b/images/puppet.png new file mode 100644 index 0000000000000000000000000000000000000000..88ab6ff07817af53a7636403a62a0c6743cba688 GIT binary patch literal 1106 zcmeAS@N?(olHy`uVBq!ia0y~yU;;9k7&w@L)Zt|+CxBE)fKP}kkp914`~ODu|2yRW zZHq72Nap_r84$Tn3dC3kWJ~{F2N#zDs{wMs44@hy10)MnBjsyRmkTsk zx+KUin1P2^(%Qz!+0!ehw7jCSx}mXi&9~)y?xP) ziBZDsVvE2ej*tJ|zvN^)?ctmL{`bzG`!Bm@UptcqG?IMq=ic%AQM*Eilrn3pwzaL)v{_9b@vI9fi9Y7>{rZIP4*V@;N&hOCVqm8iJxY zBB8x}t8l|#)`WV-8}SU^#IZ4#r)}K-msQ|?Ji|v6O8vwC{O>l0j!j(t@ArLOnN$C6 z$p22Rf7AbWqy4wz5YE4gMJ?68{qN6|W z!_sap21aOF66Q^)H3LU^So8TatQd&}8Y1GN3`|&)-~mJS4Y9nD+zSL6@|kgJM@xaQ iVBUe8v>7M?eD8(RLf%(Td|O@$GRD)@&t;ucLK6TJ Date: Mon, 21 Oct 2019 22:58:41 +0300 Subject: [PATCH 2/3] Add a couple of Docker questions --- README.md | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 78 insertions(+), 7 deletions(-) diff --git a/README.md b/README.md index 52af98b..c2ad021 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 **351** questions +:bar_chart:  There are currently **362** questions :warning:  You don't need to know how to answer all the questions in this repo. DevOps is not about knowing all :) @@ -20,13 +20,13 @@ - + - + @@ -43,7 +43,7 @@ - +
DevOps
DevOps
Beginner :baby:
Advanced :star:		Jenkins
Jenkins
Beginner :baby:
Advanced :star:		Jenkins
Jenkins
Beginner :baby:
Advanced :star:		 Git
Git
Beginner :baby:
Advanced :star:		 Linux
Linux
Beginner :baby:
Advanced :star:		 Network
Network
Beginner :baby:
Advanced :star:		 Ansible
Ansible
Beginner :baby:
Advanced :star:		 Terraform
Terraform
Beginner :baby:
Advanced :star:		Docker
Docker
Beginner :baby:
Docker
Docker
Beginner :baby:
Advanced :star:
Python
Python
Beginner :baby:
Advanced :star:		azure
Azure
Beginner :baby:
 openstack
OpenStack
Beginner :baby:
 security
Security
Beginner :baby:
puppet
Puppet
Beginner :baby:
puppet
Puppet
Beginner :baby:
Advanced :star:
@@ -1409,6 +1409,10 @@ List #### :baby: beginner +
+What is Docker? What are you using it for?
+
+
How containers are different from VMs?
@@ -1430,7 +1434,11 @@ You should choose containers when:
-What happens when you run `docker run hello-world`?
+Explain Docker architecture
+
+ +
+Describe in detail what happens when you run `docker run hello-world`?
Docker CLI passes your request to Docker daemon. Docker daemon downloads the image from Docker Hub @@ -1443,7 +1451,7 @@ Docker daemon redirects output from container to Docker CLI which redirects it t
-What do you see when you run `docker ps`?
+What best practices are you familiar related to working with containers?
@@ -1454,6 +1462,30 @@ Docker daemon redirects output from container to Docker CLI which redirects it t How would you transfer data from one container into another?
+
+What happens to data of the container when a container exists?
+
+ +
+Explain what each of the following commands do: + + * docker run + * docker rm + * docker ps + * docker build + * docker commit
+
+ +
+How do you remove old, non running, containers?
+
+ +##### Dockerfile + +
+What is Dockerfile
+
+
What is the difference between ADD and COPY in Dockerfile?
@@ -1485,10 +1517,29 @@ you with more options/features compared to Docker Hub. One example is Swarm management which means you can create new swarms in Docker Cloud.
+
+Where Docker images are stored?
+
+
Explain image layers
+ +#### :star: Advanced + +
+How do you manage persistent storage in Docker?
+
+ +
+How can you connect from the inside of your container to the localhost of your host, where the container runs?
+
+ +
+How do you copy files from Docker container to the host and vice versa?
+
+ ## Kubernetes @@ -1703,7 +1754,6 @@ Shortest way is: my_string[::-1] but it doesn't mean it's the most * Radix Sort
- #### :star: Advanced @@ -1909,6 +1959,27 @@ func main() {
+
+The following block of code tries to convert the integer 101 to a string but instead we get "e". Why is that? How to fix it? + +``` +package main + +import "fmt" + +func main() { + var x int = 101 + var y string + y = string(x) + fmt.Println(y) +} +``` +
+ +It looks what unicode value is set at 101 and uses it for converting the integer to a string. +If you want to get "101" you should use the package "strconv" and repalce y = string(x) with y = strconv.Itoa(x) +
+ ## Mongo From 40917426a2ee4c6158ee2df015625f823adbf1e6 Mon Sep 17 00:00:00 2001 From: abregman Date: Mon, 21 Oct 2019 23:23:58 +0300 Subject: [PATCH 3/3] Add a couple of OpenStack and Network questions --- README.md | 97 ++++++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 78 insertions(+), 19 deletions(-) diff --git a/README.md b/README.md index c2ad021..1c4b298 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 **362** questions +:bar_chart:  There are currently **375** questions :warning:  You don't need to know how to answer all the questions in this repo. DevOps is not about knowing all :) @@ -41,7 +41,7 @@ AWS
AWS
Beginner :baby:
azure
Azure
Beginner :baby:
- openstack
OpenStack
Beginner :baby:
+ openstack
OpenStack
Beginner :baby:
Advanced :star: security
Security
Beginner :baby:
puppet
Puppet
Beginner :baby:
Advanced :star: @@ -61,6 +61,10 @@ What is DevOps? What DevOps helps us to achieve?
+
+What are the anti-patterns of DevOps?
+
+
What is Continuous Integration?
@@ -81,10 +85,6 @@ Each piece of code (change/patch) is verified, to make the change is safe to mer What do you consider as best practices for CI/CD?
-
-What are the anti-patterns of DevOps?
-
-
What systems and/or tools are you using for the following?: @@ -182,10 +182,6 @@ which follows the immutable infrastructure paradigm. How would you structure/implement CD for an application which depends on several other applications?
-
-How do you manage dependencies?
-
-
Explain what are design patterns. Which design patterns are you familiar with?
@@ -411,6 +407,22 @@ Stop the instance, the type of the instance to match the desired RAM and start t #### :baby: Beginner +
+What is Ethernet?
+
+ +
+What is a MAC address? What is it used for?
+
+ +
+When this MAC address is used?: ff:ff:ff:ff:ff:ff
+
+ +
+What is an IP address? What is a subnet?
+
+
Explain the OSI model. What layers there are? What each layer is responsible for?
@@ -474,10 +486,6 @@ CSMA/CD algorithm: What is ARP? How it works?
-
-What is a MAC address? What is it used for?
-
-
What is TTL?
@@ -511,7 +519,7 @@ CSMA/CD algorithm:
-What is ICMP?
+What is ICMP? What is it used for?
@@ -533,14 +541,30 @@ CSMA/CD algorithm: What is Asymmetric Routing? How do deal with it?
+
+What overlay (tunnel) protocols are you familiar with?
+
+
What is GRE? How it works?
+
+What is VXLAN? How it works?
+
+ +
+What is SNAT?
+
+
Explain OSPF
+
+Explain Spine & Leaf
+
+
Using Hammind code, what would be the code word for the following data word 100111010001101?
@@ -2380,10 +2404,6 @@ the pseudo table to retrieve the sum of the prices spent by each customer, then What types of networks OpenStack supports?
-
-How do you debug OpenStack networking issues? (tools, logs, ...)
-
-
How do you debug OpenStack storage issues? (tools, logs, ...)
@@ -2396,6 +2416,45 @@ the pseudo table to retrieve the sum of the prices spent by each customer, then Are you familiar with TripleO? What benefits it has?
+##### Networking + +
+What is a provider network?
+
+ +
+What components and services exist in L2 and L3?
+
+ +
+What is the ML2 plug-in? Explain its architecture
+
+ +
+What is the L2 agent? How it works and what is it responsible for?
+
+ +
+What is the L3 agent? How it works and what is it responsible for?
+
+ +
+Explain what the Metadata agent is responsible for
+
+ +
+How do you debug OpenStack networking issues? (tools, logs, ...)
+
+ + +#### :baby: Advanced + +##### Networking + +
+Explain BGP dynamic routing +
+ ## Security