Quick JavaScript Crash Course - Modern and Advanced JavaScript - Nullish-Coalescing-Operator
Interactive Video
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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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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of the nullish coalescing operator in JavaScript?
To handle undefined properties in objects
To perform arithmetic operations
To concatenate strings
To sort arrays
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why might using the logical OR operator be problematic when setting default values?
It cannot handle undefined values
It only works with numbers
It always returns true
It treats falsy values like empty strings and zero as false
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What issue arises when using logical OR with a blank string?
It throws an error
It appends the default value to the string
It converts the string to a number
It returns the default value instead of the blank string
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which version of ECMAScript was the nullish coalescing operator introduced?
ES2020
ES2021
ES2018
ES2015
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the nullish coalescing operator improve handling of zero and empty strings?
By treating them as valid values instead of falsy
By converting them to true
By ignoring them completely
By converting them to null
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