create table test_0103 (col_1 number, col_2 varchar2(100));

insert into test_0103 select level, 'Row '||level from dual connect by level <= 100;

declare
  type ty_tab is table of test_0103%rowtype index by binary_integer;
  
  t_fetch   ty_tab;
  
  v_idx     pls_integer := 0;
  cursor c_1 is 
  select *
  from   test_0103;
begin

  open c_1;
  
  loop
    fetch c_1 bulk collect into t_fetch limit 30;
    v_idx := v_idx +1;
  
    dbms_output.put_line('Loop '||v_idx||' Rows '||t_fetch.count);
    if c_1%notfound then
      dbms_output.put_line('C_1%NOTFOUND');
    end if;    
    if c_1%found then
      dbms_output.put_line('C_1%FOUND');
    end if;
    
    if v_idx = 5 then
      exit;
    end if;
  end loop;
  close c_1;
end;
/