Oracle 1Z0-071 Quiz 58 Topic 3 Questions 286-290

Question: 1

View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables.

ORDER_ID is the primary key in the ORDERS table and the foreign key of the ORDER_ITEMS table, whose constraint is defined with the ON DELETE CASCADE option.

Which DELETE statement would execute successfully?

q1_1Z0-071

ADELETE orders o, order_items iWHERE o.order_id = i.order_id;

BDELETEFROM ordersWHERE (SELECT order_idFROM order_items);

CDELETE ordersWHERE order_total < 1000;

DDELETE order_idFROM ordersWHERE order_total < 1000;

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Question: 2

View the Exhibit and examine the structure of CUSTOMERS table.

Using the CUSTOMERS table, you need to generate a report that shows an increase in the credit limit by 15% for all customers. Customers whose credit limit has not been entered should have the message "Not Available" displayed.

Which SQL statement would produce the required result?

q2_1Z0-071

ASELECT NVL (TO CHAR(cust_credit_limit * .15), 'Not Available') 'NEW CREDIT'FROM customers;

BSELECT TO_CHAR (NVL(cust_credit_limit * .15), 'Not Available') 'NEW CREDIT'FROM customers;

CSELECT NVL(cust_credit_limit * .15), 'Not Available') 'NEW CREDIT'FROM customers;

DSELECT NVL(cust_credit_limit), 'Not Available') 'NEW CREDIT'FROM customers;

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Question: 3

View the exhibit and examine the structures of the EMPLOYEES and DEPARTMENTS tables.

q3_1Z0-071

You want to update EMPLOYEES table as follows:

Update only those employees who work in Boston or Seattle (locations 2900 and 2700).

Set department_id for these employees to the department_id corresponding to London (location_id 2100).

Set the employees' salary in location_id 2100 to 1.1 times the average salary of their department.

Set the employees' commission in location_id 2100 to 1.5 times the average commission of their department.

You issue the following command:

q3_1Z0-071

What is outcome?

AIt generates an error because multiple columns (SALARY, COMMISSION) cannot be specified together in an UPDATE statement.

BIt generates an error because a subquery cannot have a join condition in a UPDATE statement.

CIt executes successfully and gives the desired update.

DIt executes successfully but does not give the desired update.

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Question: 4

Evaluate the following two queries:

q4_1Z0-071

Which statement is true regarding the above two queries?

APerformance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.

BThere would be no change in performance.

CPerformance would degrade in query 2.

DPerformance would improve in query 2.

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Question: 5

Examine the business rule:

Each student can work on multiple projects and each project can have multiple students.

You need to design an Entity Relationship Model (ERD) for optimal data storage and allow for generating reports in this format:

STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK

Which two statements are true in this scenario? (Choose two.)

AThe ERD must have a 1:M relationship between the STUDENTS and PROJECTS entities.

BThe ERD must have a M:M relationship between the STUDENTS and PROJECTS entities that must be resolved into 1:M relationships.

CSTUDENT_ID must be the primary key in the STUDENTS entity and foreign key in the PROJECTS entity.

DPROJECT_ID must be the primary key in the PROJECTS entity and foreign key in the STUDENTS entity.

EAn associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.

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Oracle 1Z0-071 Quiz:58 Topic:3 Questions:286-290