What is the output of [...'hello']?
A). ['hello']
B). ['h', 'e', 'l', 'l', 'o']
C). [104, 101, 108, 108, 111]
D). ['h', 'e', 'll', 'o']
What does Promise.resolve(5).then(console.log) print?
A). 5
B). undefined
C). null
D). Error
What is the result of [...['a', 'b', 'c']]?
A). ['a', 'b', 'c']
B). [['a', 'b', 'c']]
C). ['abc']
D). Error
What does the ... operator do when used in a function parameter?
A). It spreads an array
B). It restates the parameters
C). It indicates a default parameter
D). It represents the rest of the arguments
How do you define a default parameter in a function?
A). function(a, b = 2) {}
B). function(a, b: 2) {}
C). function(a, b = [2]) {}
D). function(a, b := 2) {}
What does the method Array.from() do?
A). Converts an array to a string
B). Converts an iterable or array-like object to an array
C). Clones an array
D). Filters an array
How do you export a function in ES6 modules?
A). export function myFunc() {}
B). module.exports = myFunc;
C). exports.myFunc = function() {}
D). export myFunc = function() {}
How do you import a default export in ES6?
A). import { myFunc } from 'module';
B). import myFunc from 'module';
C). import * as myFunc from 'module';
D). import { default as myFunc } from 'module';
How do you declare a constant variable in ES6?
A). const
B). let
C). var
D). function
What is the output of const x = 10; x = 20;?
A). 20
B). 10
C). Error
D). undefined