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Q9. View the Exhibit and examine the data in the PRODUCT INFORMATION table.
Which two tasks would require subqueries? (Choose two.)
A. displaying the minimum list price for each product status
B. displaying all supplier IDs whose average list price is more than 500
C. displaying the number of products whose list prices are more than the average list price
D. displaying all the products whose minimum list prices are more than the average list price of products having the product status orderable
E. displaying the total number of products supplied by supplier 102071 and having product status OBSOLETE
Answer: CD
Q10. Which two statements are true regarding operators used with subqueries? (Choose two.
A. The NOT IN operator is equivalent to IS NULL
B. The <ANY operator means less than the maximum.
C. =ANY and =ALL operators have the same functionality.
D. The IN operator cannot be used in single-row subqueries.
E. TheNOT operator can be used with IN, ANY and ALL operators.
Answer: BE
Q11. Evaluate the following SQL statement:
ALTER TABLE hr.emp SET UNUSED (mgr_id);
Which statement is true regarding the effect of the above SQL statement?
A. Any synonym existing on the EMP table would have to be re-created.
B. Any constraints defined on the MGR_ID column would be removed by the above command.
C. Any views created on the EMP table that include the MGR_ID column would have to be dropped and re-created.
D. Any index created on the MGR_ID column would continue to exist until the DROP UNUSED COLUMNS command is executed.
Answer: B
Q12. View the Exhibit and examine the structure of ORD and ORD_ITEMS tables.
In the ORD table, the PRIMARY KEY is ORD_NO and in the ORD_ITEMS tables the composite PRIMARY KEY is (ORD_NO, ITEM_NO).
Which two CREATE INDEX statements are valid? (Choose two.)
A. CREATE INDEX ord_idx ON ord(ord_no);
B. CREATE INDEX ord_idx ON ord_items(ord_no);
C. CREATE INDEX ord_idx ON ord_items(item_no);
D. CREATE INDEX ord_idx ON ord,ord_items(ord_no, ord_date,qty);
Answer: BC
Q13. Evaluate the following statements:
CREATE TABLE digits
(id NUMBER(2),
description VARCHAR2(15));
INSERT INTO digits VALUES (1,'ONE);
UPDATE digits SET description =’TWO'WHERE id=1;
INSERT INTO digits VALUES (2 .’TWO’);
COMMIT;
DELETE FROM digits;
SELECT description FROM digits
VERSIONS BETWEEN TIMESTAMP MINVALUE AND MAXVALUE;
What would be the outcome of the above query?
A. Itwouldnot display any values.
B. It would displaythevalue TWO once.
C. Itwould display the valueTWOtwice.
D. Itwould display the values ONE, TWO, andTWO.
Answer: C
Q14. Evaluate the following query: SELECT INTERVAL 300' MONTH,
INTERVAL 54-2' YEAR TO MONTH,
INTERVAL '11:12:10.1234567' HOUR TO SECOND
FROM dual;
What is the correct output of the above query?
A. +25-00, +54-02,+00 11:12:10.123457
B. +00-300, +54-02,+00 11:12:10.123457
C. +25-00,+00-650,+00 11:12:10.123457
D. +00-300,+00-650,+0011:12:10.123457
Answer: A
Q15. View the Exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.
To retrieve data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following SQL statement was written:
SELECT employee_id, first_name, department_name
FROM employees NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?
A. The NATURAL JOIN clause is missing the USING clause.
B. The table prefix is missing for the column names in the SELECT clause.
C. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
D. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.
Answer: D
Q16. Which two statements are true regarding the EXISTS operator used in the correlated subqueries? (Choose two.)
A. The outer query stops evaluating the result set of the inner query when the first value is found.
B. It is used to test whether the values retrieved by the inner query exist in the result of the outer query.
C. It is used to test whether the values retrieved by the outer query exist in the result set of the inner query.
D. The outer query continues evaluating the result set of the inner query until all the values in the result set are processed.
Answer: AC