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Oracle9i program with pl/sql Sample Questions:

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

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

2. Examine this code:
CREATE OR REPLACE PRODECURE add_dept (p_dept_name VARCHAR2 DEFAULT 'placeholder', p_location VARCHAR2 DEFAULT 'Boston')
IS BEGIN INSERT INTO departments VALUES (dept_id_seq.NEXTVAL, p_dept_name, p_location); END add_dept; /
Which three are valid calls to the add_dep procedure? (Choose three)

A) add_dept(p_location=>'New York');
B) add_dept(, 'New York');
C) add_dept('Accounting');
D) add_dept;

3. Examine this function:
CREATE OR REPLACE FUNCTION CALC_PLAYER_AVG (V_ID in PLAYER_BAT_STAT.PLAYER_ID%TYPE) RETURN NUMBER IS V_AVG NUMBER; BEGIN SELECT HITS / AT_BATS INTO V_AVG FROM PLAYER_BAT_STAT WHERE PLAYER_ID = V_ID; RETURN (V_AVG); END; Which statement will successfully invoke this function in SQL *Plus?

A) EXECUTE CALC_PLAYER_AVG(31);
B) CALC_PLAYER('RUTH');
C) START CALC_PLAYER_AVG(31)
D) CALC_PLAYER_AVG(31);
E) SELECT CALC_PLAYER_AVG(PLAYER_ID) FROM PLAYER_BAT_STAT;

4. What can you do with the DBMS_LOB package?

A) Use the DBMS_LOB.FILEEXISTS function to find the location of a BFILE.
B) Use the DBMS_LOB.WRITE procedure to write data to a BFILE.
C) Use the DBMS_LOBFILENAME function to locate an external BFILE.
D) Use the DBMS_LOB.FILECLOSE procedure to close the file being accessed.

5. Given a function CALCTAX:
CREATE OR REPLACE FUNCTION calctax (sal NUMBER) RETURN NUMBER
IS
BEGIN
RETURN (sal * 0.05);
END;
If you want to run the above function from the SQL *Plus prompt, which statement is true?

A) You need to create a SQL *Plus environment variable X and issue the command EXECUTE :X := CALCTAX(1000);
B) You need to create a SQL *Plus environment variable X and issue the command EXECUTE :X := CALCTAX;
C) You need to create a SQL *Plus environment variable X and issue the command :X := CALCTAX(1000);.
D) You need to execute the command EXECUTE FUNCTION calctax;.
E) You need to execute the command CALCTAX(1000);.

Solutions: