What does this log?

var a = 1;
let b = 2;
console.log(window.a, window.b);

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

What does this log?

const p = new URLSearchParams("a=1&b=2&a=3");
console.log(p.get("a"), p.getAll("a").length, p.get("c"));

1. 1 1 undefined
2. 3 2 null
3. 1 2 null
4. 1 3 null

Which method REWRITES the current history entry without adding a new one?

1. history.replaceState()
2. history.go()
3. history.back()
4. history.pushState()

Calling history.pushState() fires the popstate event.

1. True
2. False

What does prompt("Name?") return when the person clicks Cancel?

1. false
2. undefined
3. null
4. An empty string