Mission Specialist
Mission Specialist

Passed EX280 OpenShift Administrator Exam

I feel incredibly happy to have passed the exam and finally obtained my certification, especially after my third attempt. For those of you planning to take the exam, I'd like to share my experience and advice:

  1. I cannot stress enough the importance of reading each question very carefully. Understanding the details is crucial for providing the correct answers.

  2. Personally, I tend to make typos, so I found it helpful to use the "cut and paste" method when typing commands/configurations/arguments. It minimizes the risk of errors.

  3. During the exam, time management is key. The three-hour duration goes by quickly, so if I ever got stuck on a difficult question, I would click on the "back" button and choose to "revisit" it later. This way, I ensured I had enough time to tackle other questions.

  4. Pay attention to the small things. There are many details you need to address during the exam, such as logs, events, and configurations.

  5. You don't have to worry about memorizing every setting or field. Whether using the CLI or Web GUI to configure the infrastructure, I found that copying YAML samples from the Web GUI can save time. If in doubt, I would refer to "oc explain" or use the "command help" function to get a better idea of how things work.

  6. Before taking the exam, I recommend going through the official documentation. Familiarize yourself with the layout and where specific functions or features are located. It's essential to have a general idea, so you don't waste time searching for information during the exam.

I hope my experiences and advice can be of help to you as you prepare for the exam. Good luck, and I believe you can do it too!


My score is  281/300. 

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Mission Specialist
Mission Specialist



Many things you can do imperativ using oc command. It has a good help and many commands you need to perform in exam you can find in the help. You need of course use another parameters. You can generate many yaml using oc command (with --dry-run=client -o yaml option).

You can also re-use objects created previously (e.g. in previous tasks), export them and edit.

I needed to copy few yaml content from documentation (e.g. limit range). It's a bit difficult, because together with the content the explanation numbers are copied. You need to corect it then. Find yourself a good settings for vim (or whatever you use). I usually use this

set tabstop=2
set expandtab
set shiftwidth=2


Good luck

Mission Specialist
Mission Specialist

" Global Vim settings
set autoindent " Enable automatic indentation
set expandtab " Convert tabs to spaces
set number " Show line numbers
set tabstop=2 " Set tabstop to 2 spaces
set shiftwidth=2 " Set shiftwidth to 2 spaces
set softtabstop=2 " Set softtabstop to 2 spaces
syntax on " Enable syntax highlighting

for exam: 

set ai et nu ts=2 sts=2 sw=2
syntax on

for your daily use

autocmd FileType yaml setlocal ai et nu ts=2 sw=2 sts=2
syntax on

for brazilians only. get that mneumonic: 
" seta aí o et nu sem tesão são 2 tesão 2 no switch 2 
sintaxe on"

Flight Engineer
Flight Engineer

Not sure about limit ranges, but for example NetworkPolicies you can do via web console, as well as Deployments. As Ricardo said "use tools that enable your success".

Deployments you can also do via command line "oc create deployment my_deployment --image httpd --dry-run=client -o yaml > my_deployment.yaml". Critical part is "-dry-run=client" which makes it so the resource is not created in the OpenShift. It also works for other "oc create" commands as well as "oc run" for running pod.


Pleae help me that how to learn about openshift course

Mission Specialist
Mission Specialist

It is very important to edit yaml files with vim. I will try to pass a clue to do that.

As I said earlier you cannot install or use any tool to edit yamls at remote host. So you must setup vim to edit templates, manifests and whatsoever. 

at /home user directory you must create a .vimrc file and fill it with settings below.

Full explanation of vim settings: 

" Enable automatic indentation
set autoindent

" Convert tabs to spaces
set expandtab

" Show line numbers
set number

" Set tabstop to 2 spaces
set tabstop=2

" Set shiftwidth to 2 spaces
set shiftwidth=2

" Set softtabstop to 2 spaces
set softtabstop=2

" Enable syntax highlighting
syntax on

Because you need to setup only for exam you must use a shorter configuration to make it easier to remember, trying to use some kind of mneumonic phrase for that. 

set ai et nu sw=2 ts=2 sts=2 cuc cul
syntax on

# navigation

when you do that, your vim works better but you must remember to use visual vim edit mode. 

v - enter in visual mode for selection. Don´t use keys here!!!

>>  -  moves your selection to right

<< - moves your selection to left

.  -  repeat movement

try it out. 


as I said earlier a menumonic for brazilians only:

seta aí o et nu sem tesão 2 tesão 2 no switch 2 cu que cul

sintax on

Lembra do et. 

Mission Specialist
Mission Specialist


Congratulations! Can you share what "official documentation" have you read? 


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