DevOps

Started the service, journalctl logs do not show anything. What to do?

The user complains that the server is slow and everything hangs. You log in via SSH. What will you do first?

Do you have experience in database cluster administration, configuring backup policies?

How to diagnose a 'Connection refused' error when connecting to a service on the same machine?

Senior

Wildberries

Which packets will go where during a network request? What will be the source and destination MAC addresses when sending a request to 8.8.8.8?

Senior

VK

What tools do you use for diagnosing network problems? How does dig differ from nslookup?

Middle

МТС

Do you have current job offers or vacancies you are considering?

Did you assemble the Dockerfile yourself? What is multistage build?

Middle

РЖД

What is the difference between the variables VAR=value and export VAR=value in Bash?

Senior

Wildberries

How can you create a new file in a Linux operating system?

What is the difference between needs and dependencies in GitLab CI?

Middle

МТС

How to configure interaction between PHP code and Nginx server?

How can operations of reading from a constantly growing table be optimized?

Have you worked with multi-stage Docker builds where multiple FROM instructions are used in the process?

How can you verify that Nginx is listening on the specified port?

Junior — Middle

СБЕР Звук

What technologies and tools do you use when working with large volumes of data?

What language are Ansible playbook scenarios described in?

How can you obtain information about the current process load in Linux OS?

Where is log storage in Elasticsearch?

Can you explain what the term RTO means and what role it plays in ensuring system fault tolerance?