Oracle Updated 1z0-071 Exam Questions and Answers by angelina

Given the requirement to list PRODUCT_ID, SUPPLIER_ID, and QUANTITY_ON_HAND for products with QUANTITY_ON_HAND less than five:

B. This query correctly joins the two tables on PRODUCT_ID and filters rows where QUANTITY_ON_HAND is less than five. However, the syntax presented here might be incorrect due to improper placement of the condition within the ON clause; it should be in a WHERE clause.

D. This query correctly joins the two tables on PRODUCT_ID and applies the condition in a WHERE clause, which is the proper way to filter rows after performing the join.

Incorrect options:

A: The syntax uses NATURAL JOIN and AND incorrectly; also, conditions should be in a WHERE clause, not combined with the JOIN clause.

C: Similar to A, this option incorrectly places a condition directly in the JOIN clause without using a WHERE clause.

B. True. In Oracle, synonyms can be created for sequences, allowing them to be referenced with an alternative name. This can be particularly useful when sequences are accessed across different schemas.

C. True. Oracle provides the ability to create public synonyms which are available to all users in the database. A public synonym is accessible to any user that has the necessary privileges on the underlying object.

D. True. A synonym can be created by a user to refer to an object owned by another user, assuming that the creator of the synonym has the necessary privileges to access the object owned by the other user.

When you use the INTERVAL literal for months, the result is displayed in years and months if the total number of months exceeds 12.

In the query given:

SELECT INTERVAL '100' MONTH DURATION FROM DUAL;

the output will display the interval of 100 months converted to years and the remaining months. 100 months is equal to 8 years and 4 months. Hence, the correct answer is:

DURATION +08-04

For the provided DELETE statement with an EXISTS clause:

Option B: The subquery is executed before the DELETE statement is executed.

Subqueries with EXISTS are typically executed before the outer DELETE statement to determine which rows of the outer query satisfy the condition.

Option D: The DELETE statement executes successfully even if the subquery selects multiple rows.

The EXISTS condition is used to check for the existence of rows returned by the subquery, regardless of how many rows there are. It returns TRUE if the subquery returns at least one row.

Options A, C, and E are incorrect because:

Option A: This statement is incorrect; the subquery is indeed a correlated subquery because it references the employee_id from the outer query (employees).

Option C: This is incorrect because not all existing rows in the EMPLOYEES table will be deleted, only those for which an associated record exists in the emp_history table.

Option E: While technically the subquery may be evaluated multiple times, it is only executed for those rows in EMPLOYEES that satisfy the condition of the EXISTS clause.