I recently had a situation in which for testing purposes I had to know the password for a managed service account. There’s no way to know the existing password but you can easily change it.
Recently, I was working on a custom search for a project and received the complaint that it wasn’t pulling up the proper results. They were searching “Procedure” and nothing with ProcedureS in the document was
Task upgrade has failed with a PostSetupConfigurationTaskException An exception of type Microsoft.SharePoint.PostSetupConfiguration.PostSetupConfigurationTaskException was thrown. Additional exception information: Failed to upgrade SharePoint Products.