Android Mobile Application

What is all true about a layout A Layout will typically contain one or more Views inside of it A Layout is a ViewGroup A Layout is a View A Button is considered a Layout @ in the XML layout file refers to Undefined an email address O A web address O references to things defined elsewhere in the resource file Since the activity runs on the main Ul thread, What would happen if an Activity decided to do a long running task From the users perspective, the App screen would be frozen Nothing, this is perfectly alright The app would not compile One reason It's a good idea to define string resources in res->values->strings is because if we use that same string in many locations we have a centralized place to change in case we have to modify that string later True False How many Activities can be active at 1 given time? An App can have o One Activity No Activities Multiple Activities allows you to access items in the Resource (res) directory (choose ALL that apply) The @ symbol (in XML layout files) You cannot access resources The R object (for Code) The App Manifest It is possible to create a Ul for an app completely in code True False