Free Access Oracle.1z0-071.v2022-08-30.q239 Practice Test (Page 6)

Question 21

Examine this query:

Which two methods should you use to prevent prompting for a hire date value when this query is executed?
(Choose two.)

A.Execute the SET VERIFY OFF command before executing the query.

B.Store the query in a script and pass the substitution value to the script when executing it.

C.Use the UNDEFINEcommand before executing the query.

D.Use the DEFINEcommand before executing the query.

E.Replace '&1'with '&&1'in the query.

F.Execute the SET VERIFY ONcommand before executing the query.

Question 22

In which normal form is a table, if it has no multi-valued attributes and no partial dependencies?

A.second normal form

B.first normal form

C.third normal form

D.fourth normal form

Question 23

Examine the structure of the SHIPMENTS table:

You want to generate a report that displays the PO_IDand the penalty amount to be paid if the SHIPMENT_DATEis later than one month from the PO_DATE. The penalty is $20 per day.
Evaluate the following two queries:

Which statement is true regarding the above commands?

A.Only the second query executes successfully but gives a wrong result.

B.Only the first query executes successfully but gives a wrong result.

C.Both execute successfully and give correct results.

D.Only the second query executes successfully and gives the correct result.

E.Only the first query executes successfully and gives the correct result.

Question 24

View the Exhibit and examine the structure of the EMP table which is not partitioned and not an index-organized table. (Choose two.)

Evaluate this SQL statement:
ALTER TABLE emp
DROP COLUMN first_name;
Which two statements are true?

A.The FIRST_NAME column would be dropped provided at least one column remains in the table.

B.The FIRST_NAME column would be dropped provided it does not contain any data.

C.The FIRST_NAME column can be dropped even if it is part of a composite PRIMARY KEY provided the CASCADE option is added to the SQL statement.

D.The drop of the FIRST_NAME column can be rolled back provided the SET UNUSED option is added to the SQL statement.

Question 25

You must create a table EMPLOYEES in which the values in the columns EMPLOYEES_ID and LOGIN_ID must be unique and not null.
Which two SQL statements would create the required table? (Choose two.) CREATE TABLE employees

A.(employee_id NUMBER,
login_id NUMBER,
employee_name VARCHAR2(100),
hire_date DATE,
CONSTRAINT emp_id_uk UNIQUE (employee_id, login_id));
CREATE TABLE employees

B.(employee_id NUMBER,
login_id NUMBER,
employee_name VARCHAR2(100),
hire_date DATE,
CONSTRAINT emp_id_uk UNIQUE (employee_id, login_id);
CONSTRAINT emp_id_nn NOT NULL (employee_id, login_id));
CREATE TABLE employees

C.(employee_id NUMBER CONSTRAINT emp_id_nn NOT NULL,
login_id NUMBER CONSTRAINT login_id_nn NOT NULL,
employee_name VARCHAR2(100),
hire_date DATE,
CONSTRAINT emp_num_id_uk UNIQUE (employee_id, login_id));

D.(employee_id NUMBER CONSTRAINT emp_id_pk PRIMARY KEY,
login_id NUMBER UNIQUE,
employee_name VARCHAR2(25),
hire_date DATE);
CREATE TABLE employees

E.(employee_id NUMBER,
login_id NUMBER,
employee_name VARCHAR2(25),
hire_date DATE,
CONSTRAINT emp_id_pk PRIMARY KEY (employee_id, login_id));
CREATE TABLE employees

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Question 21

Question 22

Question 23

Question 24

Question 25

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