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Oracle9i program with pl/sql Sample Questions:

1. Examine this code:
CREATE OR REPLACE PACKAGE metric_converter
IS
c_height CONSTRAINT NUMBER := 2.54;
c_weight CONSTRAINT NUMBER := .454;
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER;
END;
/
CREATE OR REPLACE PACKAGE BODY metric_converter
IS
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * c_height;
END calc_height;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_weight_in_pounds * c_weight
END calc_weight
END metric_converter;
/
CREATE OR REPLACE FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * metric_converter.c_height;
END calc_height;
/
Which statement is true?

A) If you remove the package body, then the package specification is removed.
B) If you remove the package specification, then the package body is removed.
C) If you remove the stand alone stored function CALC_HEIGHT, then the METRIC_CONVERTER package body and the package specification are removed.
D) If you remove the package body, then the package specification and the stand alone stored function CALC_HEIGHT are removed.
E) The stand alone function CALC_HEIGHT cannot be created because its name is used in a packaged function.
F) If you remove the package specification, then the package body and the stand alone stored function CALC_HEIGHT are removed.

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

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

3. Which four triggering events can cause a trigger to fire? (Choose four)

A) A specific error or any errors occurs.
B) A database is shut down or started up.
C) A specific user or any user logs on or off.
D) A user executes a SELECT statement with an ORDER BY clause.
E) A user executes a JOIN statement that uses four or more tables.
F) A user executes a CREATE or an ALTER table statement.

4. Which three are true regarding error propagation? (Choose three)

A) An exception cannot propagate across remote procedure calls.
B) An exception raised inside a declaration immediately propagates to the current block.
C) An exception raised inside an exception handler immediately propagates to the enclosing block.
D) The use of the RAISE; statement in an exception handler reraises the current exception.

5. What part of a database trigger determines the number of times the trigger body executes?

A) Trigger timing
B) Trigger body
C) Trigger type
D) Trigger event

Solutions: