What two things can you track with adwords out of the box without making any code changes to your app?

The question above has multiple choices as follows.

a.       You can actually track any custom event you want to define.

b.       All app installs and all in-app purchases

c.       Android app downloads and Android in-app purchases

d.      App installs and core user demographics

The correct answer is (C) Android app downloads and Android in-app purchases

You can automatically track android in-app purchases from Google play when someone who clicked your ad makes a purchase. There is no need of adding code to your app. The same concept works on Android app downloads.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.