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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Examine the statement:
Create synonym emp for hr.employees;
What happens when you issue the statement?

A) You create a table called employees in the HR schema based on you EMP table.
B) You will have two identical tables in the HR schema with different names.
C) An error is generated.
D) You create an alternative name for the employees table in the HR schema in your own schema.

2. The user Sue issues this SQL statement:
GRANT SELECT ON sue.EMP TO alice WITH GRANT OPTION;
The user Alice issues this SQL statement:
GRANT SELECT ON sue.EMP TO reena WITH GRANT OPTION;
The user Reena issues this SQL statement:
GRANT SELECT ON sue.EMP TO timber;
The user Sue issues this SQL statement:
REVOKE select on sue.EMP FROM alice;
For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?

A) Alice only
B) Alice, Reena, and Timber
C) Alice and Reena
D) Sue, Alice, Reena, and Timber

3. Which is an iSQL*Plus command?

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

4. You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.
Which statement accomplishes this task?

A) ALTER TABLE students
ADD CONSTRAINT PRIMARY KEY (student_id);
B) ALTER TABLE students
ADD PRIMARY KEY student_id;
C) ALTER TABLE students
MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
D) ALTER TABLE students
ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;
E) ALTER TABLE students
ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);

5. Examine the structure of the EMPLOYEES table:
EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25)
Which three statements inserts a row into the table? (Choose three)

A) INSERT INTO employees (employee_id, first_name, last_name) VALUES ( 1000, 'John','');
B) INSERT INTO employees (employee_id) VALUES (1000);
C) INSERT INTO employees VALUES ( NULL, 'John','Smith');
D) INSERT INTO employees( first_name, last_name) VALUES('John','Smith');
E) INSERT INTO employees VALUES ('1000','John',NULL);
F) INSERT INTO employees(first_name,last_name, employee_id) VALUES ( 1000, 'John','Smith');

Solutions: