Ajax 호출이 ASP.NET MVC 컨트롤러에 결과를 표시하도록 하는 방법은 무엇입니까?

public class AjaxTestController : Controller
{
    //
    // GET: /AjaxTest/
    public ActionResult FirstAjax()
    {
        return View();
    }

    [HttpPost]
    public ActionResult FirstAjax(string a) // Added a parameter "a"
    {
        return Json("chamara", JsonRequestBehavior.AllowGet);
    }
}

$.ajax({
    type: "POST",
    url: '@Url.Action("FirstAjax", "AjaxTest")',
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: successFunc,
    error: errorFunc
});

$.ajax({
    url: '@Url.Action("FirstAjax", "AjaxTest")',
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: successFunc,
    error: errorFunc
});