Evaluate: "10" - (17).toString()

True or false ? typeof(null) == typeof(undefined)

What will: typeof typeof(null) return?

Evaluate: undefined + 2

Value of x.length after running this code? x = ['foo']; x.quux = 'Hello'; x[1] = 'bar';

console.log(1 + +'2' + '2')

The following are sample codes on how to merge properties of two JavaScript objects dynamically: var objl = { food: var obj2 = { animal: 'dog' }

What's the output? (function() { var objl = new Object({name: 'Jacob'}); var obj2 = new Object({name: 'Alex'}); console.log(objl == obj2); console.log(objl === obj2);

What method can't be used with a window object?

Which function determines whether the beginning of the paraml instance matches the param2?

A form contains two fields named idl and id2. How can you copy the value of the id2 field to idl?