Free 1Z0-071 Exam Dumps

Question 76

Which two partitioned table maintenance operations support asynchronous Global Index Maintenance in Oracle database 12c?

A. ALTER TABLE SPLIT PARTITION
B. ALTER TABLE MERGE PARTITION
C. ALTER TABLE TRUNCATE PARTITION
D. ALTER TABLE ADD PARTITION
E. ALTER TABLE DROP PARTITION
F. ALTER TABLE MOVE PARTITION

Correct Answer:CE

Question 77

You issued this command:
CHOOSE THREE
SQL > DROP TABLE employees; Which three statements are true?

A. Sequences used in the EMPLOYEES table become invalid.
B. If there is an uncommitted transaction in the session, it is committed.
C. All indexes and constraints defined on the table being dropped are also dropped.
D. The space used by the EMPLOYEES table is always reclaimed immediately.
E. The EMPLOYEES table can be recovered using the ROLLBACK command.
F. The EMPLOYEES table may be moved to the recycle bin.

Correct Answer:BCF

Question 78

Which two statements are true regarding constraints? (Choose two.)

A. A constraint is enforced only for an INSERT operation on a table.
B. A foreign key cannot contain NULL values.
C. The column with a UNIQUE constraint can store NULLS.
D. You can have more than one column in a table as part of a primary key.

Correct Answer:CD

Question 79

Which three statements are true regarding subqueries? (Choose three.)

A. The ORDER BY Clause can be used in a subquery.
B. A subquery can be used in the FROM clause of a SELECT statement.
C. If a subquery returns NULL, the main query may still return rows.
D. A subquery can be placed in a WHERE clause, a GROUP BY clause, or a HAVING clause.
E. Logical operators, such as AND, OR and NOT, cannot be used in the WHERE clause of a subquery.

Correct Answer:ABC

Question 80

Evaluate the following SQL statement:
SQL> select cust_id, cust_last_name "Last name" FROM customers
WHERE country_id = 10 UNION
SELECT cust_id CUST_NO, cust_last_name FROM customers
WHERE country_id = 30
Identify three ORDER BY clauses either one of which can complete the query.

A. ORDER BY "Last name"
B. ORDER BY 2, cust_id
C. ORDER BY CUST_NO
D. ORDER BY 2, 1
E. ORDER BY "CUST_NO"

Correct Answer:ABD
Using the ORDER BY Clause in Set Operations
-The ORDER BY clause can appear only once at the end of the compound query.
-Component queries cannot have individual ORDER BY clauses.
-The ORDER BY clause recognizes only the columns of the first SELECT query.
-By default, the first column of the first SELECT query is used to sort the output in an ascending order.