How can I book a PTE exam slot in India?

The main difference lies in their purpose and target audience. PTE Academic is for global university study and professional registration. PTE Core is for Canadian immigration (PR and citizenship). PTE Academic UKVI is identical to Academic but specifically required for UK visas and immigration.

PTE A

As per the durations described by the Pearson PTE for each section of the exam, the minimum total duration of the PTE exam comes to around 2 hours and 10 minutes. But the officials from Pearson often stress on the fact that test takers with often a good practice tend to complete the test in two hour

There is no way to change your PTE test centre directly after booking. In order to change, you must cancel your current test appointment and book a new test at your desired new location.

Yes, all authorised PTE test centres provide secure locker facilities to store your personal belongings during the exam. You must keep all your belonging in the locker assigned to you before entering the exam room. 

To find a Pearson-approved test centre in your state, you must visit the "test centre locator" or the Pearson Vue website. There - on typing the name of your city or state, you will get the list of all the PTE test centres available in your area.