Test you knowledge and understanding of MQTT with these short quizzes.
MQTT Basics
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A test of MQTT Basics
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Question 1 of 10
1. Question
In a Publish/Subscribe model how does the publisher know who is subscribing.
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Question 2 of 10
2. Question
MQTT uses
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Question 3 of 10
3. Question
MQTT-SN uses
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Question 4 of 10
4. Question
Each client that connects to a broker must have a unique client id?
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Question 5 of 10
5. Question
When connecting to an MQTT broker you always need a username and password?
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Question 6 of 10
6. Question
An MQTT broker can use any port, but by default it uses port 1883?
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Question 7 of 10
7. Question
MQTT transmits data to and from a broker in which format.
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Question 8 of 10
8. Question
Messages sent to an MQTT broker are encrypted by default?
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Question 9 of 10
9. Question
You can subscribe to multiple topics at once using wild cards?
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Question 10 of 10
10. Question
You must always start your topic hierachy with a / e.g. /topic name?
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MQTT Basics -Retained Messages,Clean Sessions and Last Will
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This quiz Tests your Knowledge of Retained messages,last will messages and clean sessions.
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Make a Contribution
if you find this useful and would like to make a contribution using paypal, then you can do so by clicking here.
or you can buy me a coffee using the button below
Newsletter
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Question 1 of 10
1. Question
The Last Will Message is used to:
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Question 2 of 10
2. Question
To Receive a last will message.
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Question 3 of 10
3. Question
The Last will message is sent from?
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Question 4 of 10
4. Question
When you publish a message to a topic with the retained flag set what happens to the message?
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Question 5 of 10
5. Question
To receive a retained message?
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Question 6 of 10
6. Question
To delete a retained message from a broker you must?
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Question 7 of 10
7. Question
When you connect to a broker with clean session flag set to true what Happens?
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Question 8 of 10
8. Question
You connect to a broker with the clean session flag set to false and subscribe to the topic house/sensor1.
You then disconnect and after about 10 minutes you reconnect with the same client. Do you need to Subscribe to the topic house/sensor1 again?Correct
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Question 9 of 10
9. Question
You connect to a broker with the clean session flag set to false, and subscribe to the topic house/sensor1 with QOS 1.You then disconnect, and after about 10 minutes you reconnect with the same client. If another client publishes messages on house/sensor1 with QOS 1 while you are disconnected. What happens when you reconnect?
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Question 10 of 10
10. Question
You connect to a broker with the clean session flag set to false, and subscribe to the topic house/sensor1 with QOS 0.You then disconnect, and after about 10 minutes you reconnect with the same client. If another client publishes messages on house/sensor1 with QOS 1 while you are disconnected. What happens when you reconnect?
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Learning Resources
I have a book on Kindle where you can find all of the information from the site in one place, and some people prefer a book that they can read offline. I do not recommend that you buy the book if you have already read the tutorial listed below:
- How MQTT Works -Beginners Guide
- MQTT Publish and Subscribe Beginners Guide
- Using MQTT Over WebSockets with Mosquitto
- Understanding MQTT Topics
- Introduction to MQTT Security Mechanisms
- MQTT Retained Messages Explained
- MQTT Last Will and Testament Examples
- MQTT Clean Sessions and QOS Examples
Learning Resources
- Receiving Messages with the Paho MQTT Python Client
- Two Way communication Using MQTT and Python
- Handling Multiple Client Connections-Python MQTT
- Simple Python MQTT Publish and Subscribe Example Script
- My Python Working Notes
- Paho Python MQTT Client – Understanding Callbacks
- Paho Python MQTT Client-Understanding The Loop
- Paho Python MQTT Client Objects
- Python MQTT Client Connections– Working with Connections
- Paho Python MQTT Client – Publish With Examples