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Oracle9i program with pl/sql Sample Questions:

1. Examine this code:
CREATE OR REPLACE FUNCTION gen_email_name
(p_first_name VARCHAR2, p_last_name VARCHAR2, p_id NUMBER)
RETURN VARCHAR2
IS
v_email_name VARCHAR2(19=;
BEGIN
v_email_name := SUBSTR(p_first_name, 1, 1) ||
SUBSTR(p_last_name, 1, 7) ||
'@Oracle.com';
UPDATE employees
SET email = v_email_name
WHERE employee_id = p_id;
RETURN v_email_name;
END;
Which statement removes the function?

A) DROP FUNCTION gen_email_name;
B) DELETE gen_email_name;
C) TRUNCATE gen_email_name;
D) REMOVE gen_email_name;
E) ALTER FUNCTION gen_email_name REMOVE;

2. When using a PL/SQL stored package, how is a side effect defined?

A) changes to database tables or packaged variables defined in a package specification
B) changes only to packaged public variables defined in a package body
C) changes to database tables or packaged public variables defined in a package body
D) changes only to packaged public variables defined in a package specification
E) changes only to database tables

3. When creating stored procedures and functions, which construct allows you to transfer values to and from the calling environment?

A) local variables
B) Substitution variables
C) arguments
D) Boolean variables

4. Which two statements about packages are true? (Choose two)

A) A package is loaded into memory each time it is invoked.
B) You can pass parameters to packages.
C) Packages can be nested.
D) The contents of packages can be shared by many applications.
E) You can achieve information hiding by making package constructs private.

5. You have a row level BEFORE UPDATE trigger on the EMP table. This trigger contains a SELECT statement on the EMP table to ensure that the new salary value falls within the minimum and maximum salary for a given job title.
What happens when you try to update a salary value in the EMP table?

A) The trigger fails because it needs to be a row level AFTER UPDATE trigger.
B) The trigger fails because a SELECT statement on the table being updated is not allowed.
C) The trigger fires successfully.
D) The trigger fails because you cannot use the minimum and maximum functions in a BEFORE UPDATE trigger.

Solutions: