Which Variable-defining keyword allows its variable to be accessed (as undefined) before the line that defines it?

Which of the following values is not a Boolean false?

Which of the following is not a keyword in JavaScript?

Which variable is an implicit parameter for every function in JavaScript?

Why is it usually better to work with Objects instead of Arrays to store a collection of records?

Which statement is true about the "async" attribute for the HTML script tag?

Which invokes a user-defined object constructor function?

When an array index goes out of bounds, what is returned?

null === undefined

Which orders can be performed with the Array prototype 'sort()' callback?

What is the value of x? var x = '1'+2+3;