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【第26题】OCP认证1Z0-071最新考试题库及答案

来源：优技培训时间：

071考试不仅是OCP11g的考试科目，同时也是OCP 12c的考试科目，所以关心071考题的同学有很多，对此我们专门收集整理了近期071考试的原题，并对这些考题进行讲解，希望帮助广大考生顺利通过071考试。

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071考题解析-第26题、choose two:

You executed the following CREATE TABLE statement that resulted in an error:

SQL> CREATE TABLE employees(

emp_id NUMBER(10) PRIMARY KEY,

ename VARCHAR2(20),

email NUMBER(3) UNIQUE,

address VARCHAR2(500),

phone VARCHAR2 (20),

resume LONG,

hire_date DATE,

remarks LONG,

dept_id NUMBER(3) CONSTRAINT emp_dept_id_fk REFERENCES departments(dept_id) ,

CONSTRAINT ename_nn NOT NULL(ename));

Identify two reasons for the error.

A) The PRIMARY KEY constraint in the EMP_ID column must have a name and must be defined at the table level only.

B) The FOREIGN KEY keyword is missing in the constraint definition.

C) Only one LONG column can be used per table.

D) FOREIGN KEY defined on the DEPT_ID column must be at the table level only.

E) The NOT NULL constraint on the ENAME column must be defined at the column level.

Answer:CE

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