Real-time data display in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the real-time data stream.

SCADA systems

scada.start_stream([1])

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Adata_source

Bsensor_list

Cstream_id

Dupdate_rate

Attempts:

3 left

💡 Hint

Common Mistakes

Using sensor_list instead of stream_id

Passing update_rate as the first argument

The start_stream function requires the stream_id to begin streaming data.

2fill in blank

medium

Complete the code to display the latest data value on the dashboard.

SCADA systems

dashboard.show_value([1])

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Alatest_value

Bstream_status

Cdata_packet

Dsensor_data

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the whole sensor_data object instead of just the value

Using stream_status which is not a data value

The show_value method expects the latest_value to update the display.

3fill in blank

hard

Fix the error in the code to update the display only if new data is received.

SCADA systems

if data.timestamp [1] last_update:
    dashboard.update(data.value)

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A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using == which updates only if timestamps are equal

Using < which updates on older data

The display should update only if the new data timestamp is greater than the last update time.

4fill in blank

hard

Fill both blanks to filter and display sensor data above a threshold.

SCADA systems

filtered_data = [d for d in data_stream if d.value [1] threshold]
dashboard.display([2])

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A>

Bfiltered_data

C<

Ddata_stream

Attempts:

3 left

💡 Hint

Common Mistakes

Using < which filters below threshold

Displaying the original data_stream instead of filtered_data

The list comprehension filters data values greater than the threshold, then displays the filtered data.

5fill in blank

hard

Fill all three blanks to create a dictionary of sensor names and their latest values above zero.

SCADA systems

sensor_values = [1]: [2] for [3] in sensors if sensors[[3]] > 0

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Aname

Bvalue

Csensor

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up keys and values

Using incorrect variable names

The dictionary comprehension uses sensor as the key, value as the value, and iterates over sensors filtering values above zero.