（451）Which of the following is not a valid setting for the PROGRAM_TYPE parameter in a program object or the JOB_TYPE parameter in a job object?

A. PLSQL_BLOCK

B. JAVA_STORED_PROCEDURE

C. STORED_PROCEDURE

D. EXECUTABLE

E. None of the above are invalid settings.

答案：（B）

解析：

DBMS_SCHEDULER.CREATE_PROGRAM

DBMS_SCHEDULER.CREATE_JOB

job_type参数允许的取值：

1. PLSQL_BLOCK

2. STORED_PROCEDURE

3. EXECUTABLE

4. CHAIN