Free Access Oracle.1z0-071.v2022-09-21.q298 Practice Test (Page 19)

Question 86

View the exhibit and examine the ORDERStable.

The ORDERStable contains data and all orders have been assigned a customer ID. Which statement would add a NOTNULLconstraint to the CUSTOMER_IDcolumn?

A.ALTER TABLE orders
MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);

B.ALTER TABLE orders
ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;

C.ALTER TABLE orders
MODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);

D.ALTER TABLE orders
ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);

Question 87

Which three statements are true about views in an Oracle Database? (Choose three.)

A.Views can join tables only if they belong to the same schema.

B.A view can be created that refers to a non-existent table in its defining query.

C.Views have no object number.

D.Views have no segment.

E.Rows inserted into a table using a view are retained in the table if the view is dropped.

F.A SELECT statement cannot contain a WHERE clause when querying a view containing a WHEREclause in its defining query.

Question 88

Which statement is true about Enterprise Manager (EM) express in Oracle Database 12c?

A.You can use EM express to manage multiple databases running on the same server.

B.You cannot start up or shut down a database Instance by using EM express.

C.You can create and configure pluggable databases by using EM express.

D.By default, EM express is available for a database after database creation.

E.You can perform basic administrative tasks for pluggable databases by using the EM express interface.

Question 89

View the Exhibit and examine the structure of the ORDERS table. (Choose the best answer.) You must select ORDER_ID and ORDER_DATE for all orders that were placed after the last order placed by CUSTOMER_ID 101.
Which query would give you the desired result?

A.SELECT order_id, order_date FROM ordersWHERE order_date > IN(SELECT
order_date FROM orders WHERE customer_id = 101);

B.SELECT order_id, order_date FROM ordersWHERE order_date > ALL(SELECT MAX(order_date) FROM orders ) AND customer_id = 101;

C.SELECT order_id, order_date FROM ordersWHERE order_date > ALL(SELECT order_date FROM orders WHERE customer_id = 101);

D.SELECT order_id, order_date FROM ordersWHERE order_date > ANY(SELECT order_date FROM orders WHERE customer_id = 101);

Question 90

These are the steps for a correlated subquery, listed in random order:
* The WHERE clause of the outer query is evaluated.
* A candidate row is fetched from the table specified in the outer query.
* This is repeated for the subsequent rows of the table, until all the rows are processed.
* Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query.
Which is the correct sequence in which the Oracle server evaluates a correlated subquery?

A.2, 1, 4, 3

B.4, 1, 2, 3

C.4, 2, 1, 3

D.2, 4, 1, 3

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Question 86

Question 87

Question 88

Question 89

Question 90

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