Need help with pl/sql tables

Question

i am trying but iam not understanding this....
Evaluate this program fragment:
DECLARE
TYPE user_tab_rec IS RECORD (
db_user dba_users.username%TYPE,
DBA_TAB dba_tables%ROWTYPE);
TYPE user_rec_tab IS TABLE OF test_rec
INDEX BY BINARY_INTEGER;
Tab_rec dba_tables%ROWTYPE;
Obj_owner dba_objects.owner%TYPE;
begin
(processing)
end;
What line will generate an error?
1.
TYPE user_tab_rec IS RECORD (
2.
db_user dba_users.username%TYPE,
3.
DBA_TAB dba_tables%ROWTYPE);
4.
TYPE user_rec_tab IS TABLE OF test_rec
5.
INDEX BY BINARY_INTEGER;
6.
Tab_rec dba_tables%ROWTYPE;
7.
Obj_owner dba_objects.owner%TYPE;
The correct answer is b. The line in b attempts to define a PL/SQL TABLE TYPE using a record that contains a composite datatype, which is not allowed. Answers a, c, and d are incorrect because they will not generate any errors when compiled.
how can line b attempt to define a pl/sql table type..........
thank u ramsy

Answer 1

The correct answer is bB? I see no B.
Do you mean three?
But then again
maybe line ten.
Because (processing) isn't
valid syntax you see.
I know, I know
Let's see what'll go.
And then we'll see
Is it A B or C?
SQL> r
  1  DECLARE
  2  TYPE user_tab_rec IS RECORD (
  3  db_user dba_users.username%TYPE,
  4  DBA_TAB dba_tables%ROWTYPE);
  5  TYPE user_rec_tab IS TABLE OF test_rec
  6  INDEX BY BINARY_INTEGER;
  7  Tab_rec dba_tables%ROWTYPE;
  8  Obj_owner dba_objects.owner%TYPE;
  9  begin
10  null;
11* end;
TYPE user_rec_tab IS TABLE OF test_rec
ERROR at line 5:
ORA-06550: line 5, column 31:
PLS-00201: identifier 'TEST_REC' must be declared
ORA-06550: line 5, column 1:
PL/SQL: Item ignored
SQL> create type TEST_REC as object(a number);
  2  /
Type created.
SQL> DECLARE
  2  TYPE user_tab_rec IS RECORD (
  3  db_user dba_users.username%TYPE,
  4  DBA_TAB dba_tables%ROWTYPE);
  5  TYPE user_rec_tab IS TABLE OF test_rec
  6  INDEX BY BINARY_INTEGER;
  7  Tab_rec dba_tables%ROWTYPE;
  8  Obj_owner dba_objects.owner%TYPE;
  9  begin
10  null;
11  end;
12  /
PL/SQL procedure successfully completed.
SQL> Hmmm........................
Cheers, APC