Exam 1z0-148 topic 1 question 34 discussion

Actual exam question from Oracle's 1z0-148

Question #: 34
Topic #: 1

Examine this declaration section:

Which two executable sections will display the message Summary is null?

A. BEGIN 1_rec := NULL; 1_emp := emp_typ (1_rec); IF 1_emp (1).expr_summary IS EMPTY THEN DBMS_OUTPUT.PUT_LINE (Summary is null); END IF; END;
B. BEGIN 1_rec.emp_id :=1; 1_rec.expr_summary := NULL; 1_emp :=emp_typ (1_rec); IF 1_emp(1).expr_summary IS NULL THEN DBMS_OUTPUT.PUT_LINE (Summary is null); END IF; END;
C. BEGIN 1_rec.emp_id :=1; 1_rec.expr_summary := EMPTY_CLOB (); 1_emp := emp_typ (1_rec); IF 1_emp(1).expr_summary IS NULL THEN DBMS_OUTPUT.PUT_LINE (Summary is null); END IF END;
D. BEGIN 1_emp := emp_typ (); IF NOT 1_emp. EXISTS (1) THEN DBMS_OUTPUT.PUT_LINE (Summary is null); END IF END;
E. BEGIN 1_emp. EXTEND; IF NOT 1_emp. EXISTS (1) THEN DBMS_OUTPUT.PUT_LINE (Summary is null); END IF