In OpenSocial API, the "gadgets.Prefs" namespace enables the end user to _____.

In the process of integrating OpenSocial API with Google App Engine, you do not need to maintain any servers.

Which event handler will call this function after the API has been loaded?

Which request is sent to the apiserver when an OpenSocial API wants to call the Google App Engine server for data,?

What do you mean by 'Activity' in OpenSocial API (v0.7)?

Which languages are used for integrating OpenSocial API with Google App Engine?

Which are compulsory for creating an OpenSocial (v0.7) application for Orkut?l API (v0.7)?

Which Roles are defined in OpenSocial API (v0.7)?

When you add an application to orkut sandbox by using OpenSocial (v0.7), which type of users can add the application?

What will the following code fetch for variable 'xyz' in OpenSocial for Orkut? Var xyz=gadgets.util.getUrlParameters()['gadgetId'];

Which objects are defined in the 'add' method, under 'OpenSocial.DataRequest' namespace?