Automatic screen switching happens only with what failure?

Automatic screen switching happens only with what failure?

• A. ED1
• B. ED2
• C. DCU
• D. LDU

Answer: (A)

Automatic screen switching is a failover mechanism used to keep critical information visible when a display failure occurs. In this setup, the primary screen (ED1) is the one the operator relies on. If ED1 fails, the system automatically switches to the backup screen (ED2) so you continue to see the data without manual intervention. That’s why automatic switching is described as happening only with the failure of the primary display. Failures of the other components, like the backup display, the display control path, or related units, don’t trigger this automatic switch because the trigger is specifically the loss of ED1’s operation.

Automatic screen switching is a failover mechanism used to keep critical information visible when a display failure occurs. In this setup, the primary screen (ED1) is the one the operator relies on. If ED1 fails, the system automatically switches to the backup screen (ED2) so you continue to see the data without manual intervention. That’s why automatic switching is described as happening only with the failure of the primary display. Failures of the other components, like the backup display, the display control path, or related units, don’t trigger this automatic switch because the trigger is specifically the loss of ED1’s operation.