Can we create/delete the permission sets in apex. If yes, how?

Hi Himanshu,

Yes, we can create permission set in apex and assign it to user.

// Creating the permission set
PermissionSet permSet = new PermissionSet(Label='Case Permisson Set',Name='PermissonSetName');
insert permSet;

//Assigning to the User
PermissionSetAssignment permAssg = new PermissionSetAssignment(AssigneeId='<Id of User>',PermissionSetId=permSet.id);
insert permAssg;

Also, sObject API is important part of permission sets as it allows you to perform task that you cannot be perform through the permission set UIs.

Thanks