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Oracle 1z0-071 the latest exam practice questions and answers

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Oracle Database SQL Sample Questions (Q11-Q16):

NEW QUESTION # 11
View the Exhibit and examine the data in the PRODUCTS table.

You must display product names from the PRODUCTS table that belong to the 'Software/other' category with minimum prices as either $2000 or $4000 and with no unit of measure.
You issue this query:

Which statement is true?

A. It generates an error because the condition specified for the PROD_CATEGORY column is not valid.
B. It executes successfully but returns no result.
C. It executes successfully and returns the required result.
D. It generates an error because the condition specified for PROD_UNIT_OF_MEASURE is not valid.

Answer: B

NEW QUESTION # 12
Table HR.EMPLOYEEScontains a row where the EMPLOYEE_IDis 109.
User ALICEhas no privileges to access HR.EMPLOYEES.
User ALICEstarts a session.
User HRstarts a session and successfully executes these statements:
GRANT DELETE ON employees TO alice;
UPDATE employees SET salary = 24000 WHERE employee_id = 109;
In her existing session ALICEthen executes:
DELETE FROM hr.employees WHERE employee_id = 109;
What is the result?

A. The DELETEcommand will immediately delete the row.
B. The DELETEcommand will wait for HR'Stransaction to end then return an error.
C. The DELETEcommand will wait for HR'Stransaction to end then delete the row.
D. The DELETEcommand will immediately return an error.

Answer: A

NEW QUESTION # 13
Examine the description or the BOOKS_TRANSACTIONS table:

FOR customers whose income level has a value, you want to display the first name and due amount as 5% of their credit limit. Customers whose due amount is null should not be displayed.
Which query should be used?

A. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level <> NULL
AND due_amount <> NULL;
B. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level !=NULL
AND due_amount !=NULL;
C. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level IS NOT NULL
AND due_amount IS NOT NULL;
D. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust_income_level IS NOT NULL
AND cust_credit_limit IS NOT NULL;
E. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level !=NULL
AND cust credit_level !=NULL;

Answer: D

Explanation:
D: True. This query selects the first name and calculates the due amount as 5% of the credit limit from the customers table where the income level is not null and the credit limit is also not null. The IS NOT NULL operator is used to check for non-null values correctly.
* The IS NOT NULL operator is the correct way to check for non-null values in SQL. The <> NULL and
!= NULL comparisons are incorrect because NULL is not a value that can be compared using these operators; it represents the absence of a value.
* There is no due_amount column in the customers table according to the structure provided, so any WHERE clause referencing due_amount is irrelevant and incorrect. The due_amount is a derived column in the SELECT clause.
* The correct syntax to check for non-null values is IS NOT NULL, which is used in the WHERE clause of the correct answer.
References:
* The use of IS NOT NULL in the WHERE clause to filter out null values is documented in Oracle's SQL reference.
* NULL comparisons must be done with IS NULL or IS NOT NULL for correct logical evaluation in SQL.

NEW QUESTION # 14
Which three statements about roles are true?

A. A single user can be assigned multiple roles.
B. A role is a named group of related privileges that can only be assigned to a user.
C. Privileges are assigned to a role using the GRANT statement.
D. A single role can be assigned to multiple users.
E. Roles are assigned to roles using the ALTER ROLE statement.
F. Roles are assigned to users using the ALTER USER statement.
G. Privileges are assigned to a role using the ALTER ROLE statement.

Answer: A,C,D

NEW QUESTION # 15
View the Exhibit and examine the structure of the EMPLOYEES and JOB_HISTORY tables.

Examine this query which must select the employee IDs of all the employees who have held the job SA_MAN at any time during their employment.
SELECT EMPLOYEE_ID
FROM EMPLOYEES
WHERE JOB_ID = 'SA_MAN'
-------------------------------------
SELECT EMPLOYEE_ID
FROM JOB_HISTORY
WHERE JOB_ID = 'SA_MAN';
Choose two correct SET operators which would cause the query to return the desired result.

A. MINUS
B. UNION
C. INTERSECT
D. UNION ALL

Answer: B,D

NEW QUESTION # 16
......

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