What is the value of ("dog".length)?

How do you round the number 7.25, to the nearest whole number?

Are variable identifiers case-sensitive?

String literals are written using:

Which is a valid function definition?

JavaScript supports dynamic typing, you can assign different types of values to the same variable.

What is the output of this code? var obj; console.log(obj);

Which class-based lifecycle method would be called at the same time as this effect Hook? useEffect(() => { // do things }, []);

Which event is fired on a text field within a form when a user tabs to it, or clicks or touches it?

What is the HTTP verb to request the contents of an existing resource?

Why would you choose an asynchronous structure for your code?