Why redundancy prevents costly downtime in SCADA systems - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a redundant system component.

SCADA systems

component_status = 'active' if [1] else 'standby'

Drag options to blanks, or click blank then click option'

Aprimary_component

Bbackup_component

Coffline_component

Dfailed_component

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing backup_component makes the system standby incorrectly.

The primary component is active while the backup is on standby to prevent downtime.

2fill in blank

medium

Complete the code to switch to backup if primary fails.

SCADA systems

if not primary_component.is_operational():
    [1].activate()

Drag options to blanks, or click blank then click option'

Afailed_component

Bprimary_component

Coffline_component

Dbackup_component

Attempts:

3 left

💡 Hint

Common Mistakes

Activating primary_component again causes no change.

If the primary component fails, the backup component activates to keep the system running.

3fill in blank

hard

Fix the error in the redundancy check condition.

SCADA systems

if [1].status == 'failed' and backup_component.status == 'ready':
    backup_component.activate()

Drag options to blanks, or click blank then click option'

Abackup_component

Bprimary_component

Coffline_component

Dstandby_component

Attempts:

3 left

💡 Hint

Common Mistakes

Checking backup_component.status instead of primary_component.status.

The condition must check if the primary component has failed before activating the backup.

4fill in blank

hard

Fill both blanks to create a monitoring loop for redundancy.

SCADA systems

while system.is_running():
    if [1].status == 'failed':
        [2].activate()

Drag options to blanks, or click blank then click option'

Aprimary_component

Bbackup_component

Coffline_component

Dstandby_component

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping primary and backup components in blanks.

The loop checks if the primary component failed and activates the backup component to prevent downtime.

5fill in blank

hard

Fill all three blanks to define a failover function for redundancy.

SCADA systems

def failover():
    if [1].status == 'failed':
        [2].activate()
        log('Switched to [3]')

Drag options to blanks, or click blank then click option'

Aprimary_component

Bbackup_component

Attempts:

3 left

💡 Hint

Common Mistakes

Logging the wrong component name in the message.

The function checks if the primary failed, activates the backup, and logs the switch to backup.