Short term capital gain on house property

Short Term Capital Gain will be chargeable under Income Tax Act and there is no separate provision to save this Tax. If the case is with respect to Long term Capital Gain then you would have been saved Tax via section 54. 54F, 54EC etc.

When is a property considered acquired u/s 54? Consider, a person acquired a property (residential land) in 2007 and registered it in 2011 and sold it off in 2012. Is this short term gain or long term gain?

In 2012, this person purchased another property (residential house). Does the provision u/s 54 apply?