What does this log?

let a = 5;
let b = "5";
console.log(a + b, typeof (a + b), a + Number(b));

1. 55 string 10
2. 55 number 55
3. 10 string 55
4. 10 number 10

let stock = 5; then console.assert(stock >= 0, "stock should never be negative"); runs. What does it print?

1. A warning with the value of stock
2. true
3. stock should never be negative
4. Nothing

What does this log?

let user;
console.log(user?.name ?? "Guest");

1. Guest
2. null
3. TypeError
4. undefined

What does this log?

console.log(typeof ("abc" * 5), "abc" * 5);

1. number NaN
2. string NaN
3. TypeError
4. number 0

What does this log, in order?

const wait = ms => new Promise(resolve => setTimeout(resolve, ms));
async function run() {
  console.log("waiting...");
  await wait(100);
  console.log("done");
}
run();
console.log("returned");

1. waiting..., done, returned
2. waiting..., returned, done
3. returned, waiting..., done
4. done, waiting..., returned