Multiple choice technology databases

CREATE OR REPLACE PACKAGE BODY COMPILE_THIS IS PROCEDURE A IS BEGIN G_VALUE := (‘HELLO WORLD’); END A; PROCEDURE B IS BEGIN C; DBMS_OUTPUT. PUT_LINE (‘PROCEDURE B CALLING C’); END B; PROCEDURE C IS BEGIN B; DBMS_OUTPUT. PUT_LINE (‘PROCEDURE C CALLING B’); END; END COMILE_THIS; / Procedure C is a local construct to the package. What happens when this package is compiled?

  1. It produces the output Procedure B calling C

  2. It produces the output Procedure C calling B

  3. It produces a compilation error because procedure C requires a forward declaration

  4. It produces a compilation error because procedure B requires a forward declaration.

  5. It produces a compilation error because identified g_value is not declared in procedure A
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The package has a circular reference problem: procedure C calls procedure B, but procedure C appears before procedure B in the package body. Without a forward declaration, procedure C cannot find procedure B when compiling, resulting in an error. Option C correctly identifies this forward declaration issue for procedure C. Option D is incorrect because procedure B does NOT need a forward declaration - it appears later in the code and is visible to C. Options A and B are incorrect because the code cannot produce any output - it fails to compile.

AI explanation

To answer this question, let's go through the code and understand what happens when the package is compiled.

The given code defines a package body named "COMPILE_THIS" with three procedures: A, B, and C. Procedure C is a local construct to the package.

When the package is compiled, the code will produce a compilation error because procedure C requires a forward declaration.

In the code, procedure B calls procedure C, and procedure C calls procedure B. Since procedure C is defined after procedure B, a forward declaration is required for procedure C to be able to call procedure B. However, no forward declaration is provided in the code, which leads to a compilation error.

Therefore, the correct answer is C. It produces a compilation error because procedure C requires a forward declaration.

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