The Complete React Developer Course (with Hooks and Redux) - Arrays in JSX

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Information Technology (IT), Architecture
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University
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What types of data does JSX support by default?
Objects, arrays, and functions
Booleans, null, and undefined
Strings, numbers, and arrays
Strings, numbers, and objects
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does JSX handle arrays when rendering?
It throws an error
It renders them as a single string
It ignores them completely
It renders each item side-by-side
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens if you include booleans, null, or undefined in a JSX array?
They are ignored in the output
They cause an error
They are rendered as empty strings
They are converted to strings
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is a unique key prop important when rendering arrays of JSX elements?
To prevent syntax errors
To allow for nested arrays
To optimize rendering and updates
To ensure elements are rendered in order
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the map function in rendering arrays in JSX?
To filter out unwanted elements
To transform each item into JSX
To sort the array before rendering
To concatenate all items into a string
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you ensure that each JSX element in an array has a unique key?
By using the index of the array
By using a unique identifier for each element
By using the same key for all elements
By not using a key at all
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of using map on an array of numbers to render JSX elements?
A nested array
An array of JSX elements
An array of strings
A single JSX element
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