Which statement about `let` and the temporal dead zone (TDZ) is correct?

let declarations are hoisted but cannot be accessed before initialization

let declarations are not hoisted at all

let declarations are hoisted but cannot be accessed before initialization

let variables default to undefined before assignment

TDZ only applies to const, not let

Which of these run as microtasks (before the next render / macrotask)? (Select all that apply.)

Promise.then callbacks; queueMicrotask callbacks

Core JavaScript concepts every developer should know: types, scope, equality, hoisting, and the event loop.

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