Promises & Callbacks — Series 3

Preview — 3 of 10 questions

What is logged?

javascript

new Promise(() => {
  throw new Error('executor failed');
})
  .then(() => console.log('then'))
  .catch((err) => console.log('caught:', err.message));

Athen

Bcaught: executor failed

CNothing — the error escapes the promise and crashes.

Dthen then caught: executor failed

What is logged, in order?

javascript

Promise.reject(new Error('nope'))
  .finally(() => console.log('cleanup'))
  .catch((err) => console.log('caught:', err.message));

Acaught: nope only

Bcleanup only

Ccaught: nope, then cleanup

Dcleanup, then caught: nope

What is logged?

javascript

Promise.resolve(1)
  .then((v) => v + 1)
  .then((v) => {
    console.log(v);
  })
  .then((v) => console.log(v));

A2 then undefined

B2 then 2

C1 then 2

D2 only

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