Quick JavaScript Crash Course - Modern and Advanced JavaScript - Promises-all Settled-vs-all
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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 purpose of using promises in JavaScript?
To create loops
To handle synchronous operations
To define variables
To manage asynchronous operations
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is used to handle errors in a promise chain?
catch
then
finally
resolve
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when a promise is rejected?
It goes to the catch block
It stops execution
It continues to the next then block
It restarts the promise
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why might you use Promise.allSettled over Promise.all?
To handle only the first rejected promise
To get results of all promises regardless of their state
To handle only the first resolved promise
To ignore all promises
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the key difference between Promise.all and Promise.allSettled?
Promise.all is only for synchronous operations
Promise.allSettled is faster than Promise.all
Promise.allSettled stops at the first rejection, while Promise.all waits for all to settle
Promise.allSettled waits for all promises to settle, while Promise.all stops at the first rejection
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of promises, what does 'settled' mean?
A promise is still pending
A promise is either resolved or rejected
A promise is only rejected
A promise is only resolved
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does Promise.all return if one of the promises is rejected?
The first resolved value
The rejected value
An error message
An array of resolved values
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