What does this log?

function visit() {
  let count = 0;
  count++;
  return count;
}
visit();
visit();
console.log(visit());

1. 1
2. 0
3. 3
4. 2

What does this log?

function makeCounter() {
  let n = 0;
  return () => ++n;
}
const a = makeCounter();
const b = makeCounter();
a();
a();
console.log(a(), b());

1. 1 1
2. 2 1
3. 3 1
4. 3 3

Which statement about declaring the same name twice in one scope is true?

1. All three keywords allow it
2. let allows it, but var does not
3. Only const allows it
4. var allows it silently, but let and const give a SyntaxError

What happens when this runs?

"use strict";
const settings = Object.freeze({ theme: "dark" });
settings.theme = "light";
console.log(settings.theme);

1. It logs dark
2. It logs undefined
3. TypeError
4. It logs light

Putting "use strict"; on the second line of a function, after another statement, still turns strict mode on for that function.

1. True
2. False