Promises in JavaScript
Interactive Video
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Information Technology (IT), Architecture, Religious Studies, Other, Social Studies
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KG - 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
Why are promises used in JavaScript?
To handle synchronous operations
To improve code readability
To manage unpredictable asynchronous tasks
To replace all callbacks
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the two main parts of a promise?
Producing code and consuming code
Promise creation and promise resolution
Synchronous code and asynchronous code
Error handling and success handling
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when a promise resolves?
The producing code runs again
The consuming code executes
The promise is rejected
The promise is deleted
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do chained consuming functions behave when a promise resolves?
They do not run at all
They run one after another immediately
They run with a delay between each
They run only if the promise is rejected
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What function is used to handle errors in promises?
Finally
Resolve
Reject
Catch
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What indicates an error in the console when a promise is rejected?
A green check mark
A blue info icon
A red error symbol
A yellow warning sign
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the real-world example, what does the fetch promise do?
It synchronously retrieves data
It waits for a response from the API
It immediately returns a static value
It logs an error message
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