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Oracle9i program with pl/sql Sample Questions:

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

2. What is a condition predicate in a DML trigger?

A) A conditional predicate allows you to specify a WHEN-LOGGING-ON condition in the trigger body.
B) A conditional predicate means you use the NEW and OLD qualifiers in the trigger body as a condition.
C) A conditional predicate allows you to specify a SHUTDOWN or STARTUP condition in the trigger body.
D) A conditional predicate allows you to combine several DBM triggering events into one in the trigger body.

3. You create a DML trigger. For the timing information, which is valid with a DML trigger?

A) BEFORE
B) DURING
C) ON STATEMENT EXECUTION
D) ON SHUTDOWN
E) INSTEAD

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

A) From SOL*Plus, a function can be executed by giving the command EXECUTE functionname;
B) Client-side functions can be used in SOL statements
C) A stored function that is called from a SOL statement can return a value of any PL/SOL variable data type
D) A stored function increases efficiency of queries by performing functions on the server rather than in the application
E) A function must have a return statement in its body to execute successfully

5. 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;
B) add_dept(, 'New York');
C) add_dept('Accounting');
D) add_dept(p_location=>'New York');

Solutions: