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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. User Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES, DEPARTMENTS, and LOCATIONS tables. She has the privilege to create a public synonym, and would like to create a synonym for this view that can be used by all users of the database.
Which SQL statement can Mary use to accomplish that task?

A) CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu;
B) CREATE SYNONYM EDL_VU ON emp_dept_loc_vu FOR EACH USER;
C) CREATE SYNONYM EDL_VU FOR EACH USER ON emp_dept_loc_vu;
D) CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu FOR ALL USERS;
E) CREATE PUBLIC SYNONYM EDL_VU FOR emp_dept_loc_vu;
F) CREATE PUBLIC SYNONYM EDL:VU FOR mary (emp_dept_loc_vu);

2. Which SQL statement would you use to remove a view called EMP_DEPT_VU from your schema?

A) DROP VIEW emp_dept_vu;
B) DELETE VIEW emp_dept_vu;
C) REMOVE VIEW emp_dept_vu;
D) REMOVE emp_dept_vu;
E) DELETE emp_dept_vu;
F) DROP emp_dept_vu;

3. Which statement describes the ROWID data type?

A) Binary data stored in an external file, up to 4 gigabytes.
B) A hexadecimal string representing the unique address of a row in its table.
C) Character data up to 4 gigabytes.
D) Raw binary data of variable length up to 2 gigabytes.
E) Binary data up to 4 gigabytes.

4. EMPLOYEES and DEPARTMENTS data:

On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID
managers and refers to the EMPLOYEE_ID.
On the DEPARTMENTS table DEPARTMENT_ID is the primary key.
Evaluate this UPDATE statement.
UPDATE employees
SET mgr_id =
(SELECT mgr_id
FROM employees
WHERE dept_id=
(SELECT department_id
FROM departments
WHERE department_name = 'Administration')),
Salary = (SELECT salary
FROM employees
WHERE emp_name = 'Smith')
WHERE job_id = 'IT_ADMIN';
What happens when the statement is executed?

A) The statement fails because there is more than one row matching the IT_ADMIN job ID in the EMPLOYEES table.
B) The statement executes successfully, leaves the manager ID as the existing value, and changes the salary to 4000 for the employees with ID 103 and 105.
C) The statement fails because there is more than one row matching the employee name Smith.
D) The statement executes successfully, changes the manager ID to NULL, and changes the salary to 4000 for the employees with ID 103 and 105.
E) The statement fails because there is no 'Administration' department in the DEPARTMENTS table.
F) The statement executes successfully, changes the manager ID to NULL, and changes the salary to 3000 for the employees with ID 103 and 105.

5. When should you create a role? (Choose two)

A) To simplify the process of granting and revoking privileges.
B) To simplify the process of creating new users using the CREATE USER xxx IDENTIFIED by yyy statement.
C) To grant a group of related privileges to a user.
D) When the number of people using the database is very high.
E) To simplify profile maintenance for a user who is constantly traveling.

Solutions: