What does this log?

const s = new String("hi");
console.log(typeof s, s === "hi", typeof String(42));

1. object false string
2. object true object
3. string true string
4. string false string

What does this log?

const user = { name: "Ava", tags: ["js"] };
const copy = { ...user };
copy.name = "Zed";
copy.tags.push("css");
console.log(user.name, user.tags);

1. Ava ["js"]
2. Ava ["js", "css"]
3. Zed ["js"]
4. Zed ["js", "css"]

new Math() works and creates a new math object, just like new Date() creates a new date.

1. True
2. False

What does this log?

console.log(typeof mystery);
try {
  console.log(mystery);
} catch (e) {
  console.log(e.name);
}

1. object, then undefined
2. undefined, then ReferenceError
3. undefined twice
4. ReferenceError twice

What does this log?

function greet(name = "friend") {
  return "Hi, " + name;
}
console.log(greet(), greet(undefined), greet(null));

1. Hi, undefined Hi, undefined Hi, null
2. Hi, friend Hi, friend Hi, null
3. Hi, friend Hi, undefined Hi, null
4. Hi, friend Hi, friend Hi, friend