What provides a visual model for classifying and comparing various social media services?

Which of the following server types is commonly used for authentication and credential storage?

A. File server B. Directory server C. Web server D. DNS server

Which of the following statements about Intents is false?

a. Intents are Android’s mechanism for communicating between executable com-ponents—such as activities, background services and the operating system. b. You state your intent, then Android uses intent messaging to coordinate the exe-cutable components to accomplish what you intend to do. c. This tight coupling makes it easy to mix and match parts of different applications. d. You tell Android what you want to accomplish, then let Android find the installed applications with activities that can handle the task.