The Complete React Developer Course (with Hooks and Redux) - Array Data in Firebase: Part II
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary goal when fetching data from Firebase for Redux?
To store data directly in the database
To transform data into an array format
To convert data into a string format
To delete unnecessary data
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is used to iterate over child snapshots in Firebase?
reduce
map
forEach
filter
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the 'key' property in a Firebase snapshot?
It stores the value of the data
It represents the unique ID of the data
It indicates the data type
It is used to delete data
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of setting up a subscription in Firebase?
To convert data into JSON
To fetch data once
To handle real-time data updates
To delete data automatically
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of the 'on' method in Firebase?
To convert data to XML
To set up a real-time listener
To fetch data once
To delete data
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which event is triggered when a child is removed from Firebase?
child_added
child_changed
value
child_removed
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the 'child_changed' event in Firebase signify?
A new child has been added
A child has been removed
A child has been updated
All children have been deleted
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