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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_home := 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;
You run this SELECT statement:
SELECT first_name, last_name
gen_email_name(first_name, last_name, 108) EMAIL
FROM employees;
What occurs?

A) The statement fails because functions called from SQL expressions cannot perform DML.
B) The statement fails because the functions does not contain code to end the transaction.
C) Employee 108 has his email name updated based on the return result of the function.
D) The SQL statement executes successfully and control is passed to the calling environment.
E) The SQL statement executes successfully, because UPDATE and DELETE statements are ignoring in stored functions called from SQL expressions.

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

A) The package specification is optional, but the package body is required.
B) The package specification is required, but the package body is optional.
C) The specification and body of the package are stored separately in the database.
D) The specification and body of the package are stored together in the database.
E) Both the specification and body are required components of a package.

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

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

4. You need to disable all triggers on the EMPLOYEES table.Which command accomplishes this?

A) ALTER employees DISABLE ALL TRIGGERS;
B) None of these commands; you cannot disable multiple triggers on a table in one command.
C) ALTER TRIGGERS ON TABLE employees DISABLE;
D) ALTER TABLE employees DISABLE ALL TRIGGERS;

5. Which two describe a stored procedure? (Choose two)

A) A stored procedure is typically written in SQL.
B) A stored procedure is a type of PL/SQL subprogram that performs an action.
C) The executable section of a stored procedure contains statements that assigns values, control execution, and return values to the calling environment.
D) A stored procedure has three parts: the specification, the body, and the exception handler part.
E) A stored procedure is a named PL/SQL block that can accept parameters.

Solutions: