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Modern JavaScript Challenge
Modern JavaScript Challenge
Assess your skills in ES6+ syntax, asynchronous programming, and DOM interaction.
Question 1 of 3
10 Points
Which keyword declares a block-scoped variable that cannot be reassigned?
A)
var
B)
let
C)
const
D)
static
Question 2 of 3
10 Points
What does the Promise.all() method return?
A)
A single value
B)
A single Promise that resolves to an array of results
C)
A callback function
D)
A generator
Question 3 of 3
10 Points
What will typeof NaN return in JavaScript?
A)
"number"
B)
"nan"
C)
"undefined"
D)
"null"
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