Instruction: Answer the given question using the supporting document.

Input:
Question: how many cameras ?
Document: Tablets and cameras do not make sense in my view, as they all tend to be poor quality anyway. If I want to take a photo, I use a real camera, aim it properly and compose my shots.I will absolutely recommend this tablet to anyone seeking to make a purchase.
Fast with great screen resolution. Love the size, you can hold it with one hand easely, ideal for read news magazzines etc.games runs smooth, and you can attach all kinds of USB controllers, drives, cameras- sony nex 5, you ll need a otg USB cable forma that
Its compact, user friendly and efficient. More than that, it offers a world of apps through the Google store. Whatever your interest you will be sure to find an app for it. Other popular tablet that I have tried restricted me in someway because I do not live in the US. I recommend this especially for people in countries outside of the USA and Canada. I wish however that it had dual cameras and the ability to connect to my TV.
Also, i can feel the screen depress when I press on the left or right edge. The back feels really good in the hand, good soft grip to it. Very attractive looking.Cameras is useless. The face unlock feature is ineffective. it rarely recognizes me. have yet to use it for video chat.Screen shots are easy tot ake when holding volume and power buttons at the same time.Volume and power buttons are easy to press down. Good tactile feel to them.No HDMI port out.
FORGET ABOUT PICTURES!Google let Asus cut too many corners here. Not good for Google's reputation.
It`s a great e-reader. Does so many things I don`t even know how to do yet, but I am learning. I have no complaints!
I have used many tablets, the Nexus is the best of them all. Easy to use, great resolution, and many apps to choose from.
the best tablet I bought, good design and especially many applications for Android, a great tablet and very good price
This sells for $199 now. Check Office Depot, etc. The new 32GB is selling for $249. Amazing how many uninformed shoppers there are.
Great for college students. Useful for downloading books. Use everyday. Don't know what I would do without. Many uses for me.
Answer: There's one back-facing camera installed on the Nexus 7, but you will have to install a camera app to put an icon on your tablet to launch the camera. I installed Nexus 7 Camera Launcher from the Google Play app store - it was free and it does the job. When the camera is on, you will see your own face displayed, not what's out in front of you. It's great for a taking a quick snap of yourself or you with a friend, but that's about it.My tablet camera works fine but since I'd much rather take photos of what's in front of me and I can't unless I turn myself around and aim the camera back over my shoulder, I find the camera pretty much useless myself.