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Oracle 1Z0-147 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Database Triggers | 15% | - Creating and managing triggers
|
| Control Structures | 15% | - Iterative statements
|
| PL/SQL Fundamentals | 15% | - Declaring Variables and Data Types
|
| Procedures and Functions | 20% | - Creating and invoking functions
|
| Packages | 20% | - Advanced package features
|
| Managing Dependencies and Performance | 5% | - Object dependencies
|
| Error Handling and Exceptions | 10% | - Handling exceptions
|
Oracle9i program with pl/sql Sample Questions:
1. Which statements are true? (Choose all that apply)
A) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_TRIGGERS data dictionary view to see the compilation errors.
B) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_ERRORS data dictionary view to see compilation errors.
C) If errors occur during the compilation of a trigger you can use the SHOW ERRORS command within iSQL *Plus to see the compilation errors.
D) If errors occur during the compilation of a trigger, the trigger is still created.
2. You have a row level BEFORE UPDATE trigger on the EMP table. This trigger contains a SELECT statement on the EMP table to ensure that the new salary value falls within the minimum and maximum salary for a given job title.
What happens when you try to update a salary value in the EMP table?
A) The trigger fails because you cannot use the minimum and maximum functions in a BEFORE UPDATE trigger.
B) The trigger fails because it needs to be a row level AFTER UPDATE trigger.
C) The trigger fires successfully.
D) The trigger fails because a SELECT statement on the table being updated is not allowed.
3. Examine this code:
CREATE OR REPLACE PACKAGE bonus
IS
g_max_bonus NUMBER := .99;
FUNCTION calc_bonus (p_emp_id NUMBER)
RETURN NUMBER;
FUNCTION calc_salary (p_emp_id NUMBER)
RETURN NUMBER;
END;
/
CREATE OR REPLACE PACKAGE BODY bonus
IS v_salary employees.salary%TYPE; v_bonus employees.commission_pct%TYPE; FUNCTION calc_bonus (p_emp_id NUMBER) RETURN NUMBER IS BEGIN SELECT salary, commission_pct INTO v_salary, v_bonus FROM employees WHERE employee_id = p_emp_id; RETURN v_bonus * v_salary; END calc_bonus FUNCTION calc_salary (p_emp_id NUMBER) RETURN NUMBER IS BEGIN SELECT salary, commission_pct INTO v_salary, v_bonus FROM employees WHERE employees RETURN v_bonus * v_salary + v_salary; END cacl_salary; END bonus; / Which statement is true?
A) You can call the BONUS.CALC_SALARY packaged function from an INSERT command against the EMPLOYEES table.
B) You can call the BONUS.CALC_SALARY packaged function from a SELECT command against the EMPLOYEES table.
C) You can call the BONUS.CALC_SALARY packaged function form a DELETE command against the EMPLOYEES table.
D) You can call the BONUS.CALC_SALARY packaged function from an UPDATE command against the EMPLOYEES table.
4. Which two statements about packages are true? (Choose two)
A) The specification and body of the package are stored together in the database.
B) Both the specification and body are required components of a package.
C) The package specification is required, but the package body is optional.
D) The package specification is optional, but the package body is required.
E) The specification and body of the package are stored separately in the database.
5. Examine this code:
CREATE OR REPLACE PROCEDURE audit_action (p_who VARCHAR2) AS BEGIN INSERT INTO audit(schema_user) VALUES(p_who); END audit_action; /
CREATE OR REPLACE TRIGGER watch_it AFTER LOGON ON DATABASE CALL audit_action(ora_login_user) / What does this trigger do?
A) The trigger records an audit trail when a user makes changes to the database.
B) The trigger marks the user as logged on to the database before an audit statement is issued.
C) The trigger invoked the procedure audit_action each time a user logs on to his/her schema and adds the username to the audit table.
D) The trigger invokes the procedure audit_action each time a user logs on to the database and adds the username to the audit table.
Solutions:
| Question # 1 Answer: B,C,D | Question # 2 Answer: D | Question # 3 Answer: B | Question # 4 Answer: C,E | Question # 5 Answer: D |
