Why is it must to specify Database.allowCallouts in the class defination in Salesforce?

Hello Anjali,

Database.AllowCallout helps in integrate salesforce with external server by making a call to an external web service . That is why it is must to specify Database.allowCallouts in the class defination to use callouts in batch apex

If you want to integrate other party then we have to use Database.AllowsCallouts interface. It is used to allow Callouts in batch Apex Callouts include HTTP requests as well as methods defined with the web Service keyword.

Thanks.