Q) What are error codes?

Ans –

500 – Internal Server Error i.e. application is down.

403 – File Not Found i.e. application related files are missing.

304 – Redirect issue i.e. Our application is not redirected properly.

200 – Application is running fine

Q) What is deployment?

Ans – Deployment is the process to change existing code or deploy new code in production environment after validating the code in development or staging environment.

-          For deploying any changes in production, we need the change request (CR) in proper places.

-          In the change request, we include deployment start date, end date deployment description or task should be correct.

-          We have some maintenance window in our application. In this maintenance window, we should have deploy our code so that there is no business impact.

-          Development team should give us the proper deployment plan part of those activities.

-          If there is any file change in part of the deployment, then the development team should stage the file in stage environment so that we copy the file from stage to production.

Steps follow during deployment: -

-          Stop the application (Take the back up of production code file)

-          Copy the change code from staging to production.

-          Production config changes.

-          Start the application.

-          Application validation.

-          User Validation.

-          End User Validation.

Q) If any important file is accidently deleted, then what will we do?

Ans – We have a daily and weekly server back up. If any file deleted from any server, then we will raise a ticket with priority to our backup and recovery team to restore back the file.

Q) To know whether a port is listening or not?

Ans - $ netstat –an | grep - i <Port Number>