Function Declarations vs Expressions

The true statement is that the `arguments` object is an array-like object that contains all arguments passed to the function. It's available inside all functions except arrow functions. While `arguments` resembles an array (it has indexed elements and a length property), it's not a true array and lacks array methods like `map` and `filter`. To use array methods on `arguments`, you need to convert it first, typically with `Array.from(arguments)` or `[...arguments]` in modern JavaScript. The `arguments` object is useful for handling variable numbers of arguments, but in modern JavaScript, it's often replaced by the rest parameter syntax (`...args`), which creates a real array and is more explicit about a function's variadic nature. Despite some suggestions to avoid it, the `arguments` object isn't deprecated—it's still part of the language specification, though rest parameters offer a cleaner alternative in most cases.