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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. You are the DBA for an academic database. You need to create a role that allows a group of users to modify existing rows in the STUDENT_GRADES table.
Which set of statements accomplishes this?

A) CREATE NEW ROLE registrar; GRANT ALL ON student_grades TO registrar; GRANT registrar to user1, user2, user3
B) CREATE ROLE registrar; GRANT MODIFY ON student_grades TO registrar; GRANT registrar to user1, user2, user3
C) CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT ROLE registrar to user1, user2, user3
D) CREATE registrar; GRANT CHANGE ON student_grades TO registrar; GRANT registrar;
E) CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT registrar to user1, user2, user3;

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

A) The NOT NULL constraint ensures that null values are not permitted for the column.
B) A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.
C) The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.
D) The UNIQUE constraint does not permit a null value for the column.

3. Examine the statement:
GRANT select, insert, update
ON student_grades
TO manager
WITH GRANT OPTION;
Which two are true? (Choose two.)

A) It allows the MANAGER to apply all DML statements on the STUDENT_GRADES table.
B) It allows the MANAGER the ability to select from, insert into, and update the STUDENT_GRADES table.
C) MANAGER must be a role.
D) It allows the MANAGER the ability to select from, delete from, and update the STUDENT_GRADES table.
E) It allows the MANAGER to pass the specified privileges on to other users.
F) It allows the MANAGER to create tables that refer to the STUDENT_GRADES table.

4. Which is an iSQL*Plus command?

A) RENAME
B) DESCRIBE
C) UPDATE
D) INSERT
E) SELECT
F) DELETE

5. Evaluate these two SQL statements:
SELECT last_name, salary , hire_date
FROM EMPLOYEES
ORDER BY salary DESC;
SELECT last_name, salary, hire_date
FROM EMPLOYEES
ORDER BY 2 DESC;
What is true about them?

A) The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.
B) The two statements produce identical results.
C) There is no need to specify DESC because the results are sorted in descending order by default.
D) The second statement returns a syntax error.

Solutions: