Yes, we can create a object in static block

We can create object because static block is a executable 
block and we don't want any Instance to call. It will be 
called before executing or calling the main thread 
But here we will get object and exception 
//Exception in thread "main" java.lang.NoSuchMethodError: 
main

Yes we can do this . Because we can create an object at
runtime and  static block is also execute when a class is
loaded by  the class loader at runtime

Yes we can create a object in static block.
1- if there is no main method than it will compile easily but at run time it will throw exception 
//Exception in thread "main" java.lang.NoSuchMethodError: 
main
2- if we put main method inside the class then it will compile and run successfully and we will get object.

Yes we can create a object in static block
EX:-

public class Stobject
{
   static
  {
   Stobject st =new Stobject();
  }
Stobject()
{
System .out.println("object created");
}
  
public static void main(String k[])
{
  System .out.println("HAI");
 }
}
output:-
object created
HAi