1. Which is NOT an abstract method in BaseAdapter?
getContext()
getCount()
getItem()
getItemId()
getView()

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2. Why do we test to see if convertView is null?
Efficiency
The code is cleaner and easier to maintain that way

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3. What method is used to tell the adapter that it needs to update?
notifyAll()
notifyDataSetChanged()
notifyDataSetInvalidated()

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4. How do we listen to clicks on views in a ListView?
onItemClickListener()
onClickListener()
OnItemLongClickListener()

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