Hello Uday,

One org can hold max of 1000 permission set(1500 including Managed packages) and if we want, we can assign all permission sets to a single User.

You can run the following code snippet in developer Console to check by yourself:

integer count =1;
for(integer i = 1; i<=75;i++){
PermissionSet pr = new PermissionSet(Label='Case… Read more