Why MQTT is the IoT standard in IOT Protocols - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to publish a message to an MQTT topic.

IOT Protocols

client.publish('[1]', 'Hello IoT')

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

Asubscribe

Bconnect

Csensor/data

Ddisconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Using connection commands instead of a topic name.

The publish method sends a message to the specified topic, here 'sensor/data'.

2fill in blank

medium

Complete the code to subscribe to an MQTT topic.

IOT Protocols

client.[1]('home/temperature')

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

Aconnect

Bpublish

Cdisconnect

Dsubscribe

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'publish' instead of 'subscribe'.

The subscribe method listens for messages on the given topic.

3fill in blank

hard

Fix the error in the MQTT connection code by completing the blank.

IOT Protocols

client.[1]('mqtt.example.com')

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

Aconnect

Bpublish

Csubscribe

Ddisconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to publish or subscribe before connecting.

The connect method establishes a connection to the MQTT broker.

4fill in blank

hard

Fill both blanks to create a dictionary of sensor readings filtered by temperature above 25.

IOT Protocols

{word: [1] for word in readings if readings[word] [2] 25}

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Areadings[word]

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key instead of the value.

Using wrong comparison operator.

This dictionary comprehension keeps readings where the temperature is greater than 25.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values filtered by humidity less than 50.

IOT Protocols

{ [1]: [2] for [3] in data if data[[3]] < 50 }

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Ak.upper()

Bdata[k]

Ck

Dv

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names.

Not converting keys to uppercase.

This comprehension creates a dictionary with keys in uppercase and values from data where humidity is less than 50.