Functions & Scope — Series 2

Preview — 3 of 10 questions

What is logged?

javascript

for (var i = 0; i < 3; i++) {
  setTimeout(() => console.log(i), 0);
}

A3 3 3

B0 1 2

C1 2 3

Dundefined undefined undefined

What is logged?

javascript

var counter = (function () {
  var count = 0;
  return function () {
    return ++count;
  };
})();

console.log(counter());
console.log(counter());
console.log(typeof count);

A1, 2, "number"

B1, 2, "undefined"

C0, 1, "undefined"

DReferenceError thrown on the third line

What is logged?

javascript

function outer() {
  const inner = () => {
    console.log(arguments[0]);
  };
  inner();
}

outer(42);

Aundefined

BReferenceError: arguments is not defined

C42

D[]

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