You should add the following XML code illustrated in the following image to AdView widget in order to add an Ad to your activity:
Which two choices of the following are correct about adUnitId ? (Select two)

Answer : A, B
Android OS only allows installing apps that are signed with a digital certificate.
Answer : A
App ID is a unique ID number assigned to your apps when they're added to AdMob. The app ID is used to identify your apps.
Answer : A
As a UX designer, when you design a long signup form, which of the following choices should you consider?
Answer : C
Which of the following choices is the best description of the image below?

Answer : C
Which of the following choices is considered a purpose of app test usability by participants?
Answer : A
Once your app has been offered for Free, it can be changed to be a Paid one.
Answer : B