Alarm flooding prevention in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the maximum number of alarms per minute.

SCADA systems

alarm_config.set_max_alarms_per_minute([1])

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A100

B50

C200

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the limit too high causes alarm flooding.

Setting it to 0 disables alarms completely.

Setting the maximum alarms per minute to 50 helps prevent alarm flooding by limiting alarm frequency.

2fill in blank

medium

Complete the code to enable alarm suppression after {{BLANK_1}} repeated alarms.

SCADA systems

alarm_manager.enable_suppression_after([1])

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A5

B1

C3

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing too high a number delays suppression.

Choosing 1 suppresses alarms too early.

Enabling suppression after 3 repeated alarms helps reduce alarm flooding by ignoring repeated alarms after this count.

3fill in blank

hard

Fix the error in the code to correctly reset the alarm flood counter.

SCADA systems

alarm_flood_counter.[1]()

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Areset

Bclear

Crestart

Dflush

Attempts:

3 left

💡 Hint

Common Mistakes

Using clear() which may not exist.

Using flush() which is for buffers.

The correct method to reset the alarm flood counter is reset().

4fill in blank

hard

Fill both blanks to create a filter that only allows alarms with severity {{BLANK_1}} or higher and from source {{BLANK_2}}.

SCADA systems

alarm_filter = AlarmFilter(severity=[1], source='[2]')

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Ahigh

Bmedium

Csensor_42

Dsensor_7

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'medium' severity allows less important alarms.

Choosing wrong sensor source filters wrong alarms.

Filtering alarms with severity 'high' and source 'sensor_42' helps focus on important alarms from a specific source.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps alarm IDs to their timestamps only if the alarm severity is {{BLANK_1}}, the source is {{BLANK_2}}, and the alarm is active ({{BLANK_3}} is True).

SCADA systems

active_alarms = {alarm.id: alarm.timestamp for alarm in alarms if alarm.severity == '[1]' and alarm.source == '[2]' and alarm.[3]

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Acritical

Bsensor_99

Cis_active

Dis_acknowledged

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'is_acknowledged' instead of 'is_active' includes inactive alarms.

Choosing wrong severity or source filters wrong alarms.

This comprehension filters alarms that are critical, from sensor_99, and currently active.