Yes. At any given point of time, Indian airports are very well secured as compared to the airports in Pakistan.
No. Airports in several cities of India are vulnerable with regard to the security aspects and major terrorist strikes can take place anytime.
Yes. After 26/11, security at airports, boarders as well as in public transport areas has increased.
Might be. Considering the increased security and new rules to secure various areas. But there are loopholes too.
Yes. India is far better in terms of security than Pakistan and securing airports has always been a priority for the govts at the Centre as well as the state.