What is the output of const x = 10; x = 20;?
A). 20
B). 10
C). Error
D). undefined
What does the for...of loop iterate over?
A). Object properties
B). Object values
C). Array indices
D). Iterable objects
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 can you create a new promise in ES6?
A). new Promise(function)
B). Promise(function)
C). promise(function)
D). New Promise(function)
How do you interpolate variables in a string using template literals?
A). Hello, + name + '!'
B). Hello, ${name}!
C). 'Hello, ' + name + '!'
D). Both A and B
What is the output of typeof Symbol('description')?
A). 'string'
B). 'object'
C). 'symbol'
D). 'undefined'
What is the output of const [a, b] = [1, 2];?
A). a = 1, b = 2
B). a = [1], b = [2]
C). a = 2, b = 1
D). Error
How do you create a generator function in ES6?
A). function* gen() {}
B). function gen*() {}
C). function*gen() {}
D). function * gen() {}
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 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