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Oracle 1z0-071 Exam Sample Questions


Question # 1

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

A.

A SELECT statement can access one or more indices without accessing any tables

B.

An update to a table can result in no updates to any of the table’s indexes

C.

A table belonging to one user can have an index that belongs to a different user

D.

A UNIQUE index can be altered to be non-unique

E.

An update to a table can result in updates to any or all of the table’s indexes



A.

A SELECT statement can access one or more indices without accessing any tables


B.

An update to a table can result in no updates to any of the table’s indexes






Question # 2

You issue this command which succeeds:
SQL> DROP TABLE products;
Which three statements are true?

A.

All existing views and synonyms that refer to the table are invalidated but retained.

B.


Any uncommitted transaction in the session is committed.

C.

Table data and the table structure are deleted.

D.

All the table’s indexes if any exist, are invalidated but retained.

E.

Table data is deleted but the table structure is retained.X``



B.


Any uncommitted transaction in the session is committed.


C.

Table data and the table structure are deleted.


D.

All the table’s indexes if any exist, are invalidated but retained.





Question # 3

Which three statements are true about inner and outer joins?
Outer joins can be used when there are multiple join conditions on two tables.
Outer joins can only be used between two tables per query.

A.

A full outer join returns matched and unmatched rows.

B.

An inner join returns matched rows.

C.

A full outer join must use Oracle syntax.

D.

A left or right outer join returns only unmatched rows.



B.

An inner join returns matched rows.


C.

A full outer join must use Oracle syntax.


D.

A left or right outer join returns only unmatched rows.





Question # 4

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"



A.

ORDER BY "Last name"


B.

ORDER BY 2, cust_id


D.

ORDER BY 2, 1


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.




Question # 5

You need to display the first names of all customers from the CUSTOMERS table that contain the character
‘e’ and have the character ‘a’ in the second last position.
Which query would give the required output?

 

A.

SELECT cust_first_nameFROM customersWHERE INSTR(cust_first_name, ‘e’)<>0
ANDSUBSTR(cust_first_name, -2, 1)=’a’;

B.

SELECT cust_first_nameFROM customersWHERE INSTR(cust_first_name, ‘e’)<>''
ANDSUBSTR(cust_first_name, -2, 1)=’a’;

C.

SELECT cust_first_nameFROM customersWHERE INSTR(cust_first_name, ‘e’)IS NOT NULL
ANDSUBSTR(cust_first_name, 1, -2)=’a’;

D.

SELECT cust_first_nameFROM customersWHERE INSTR(cust_first_name, ‘e’)<>0
ANDSUBSTR(cust_first_name, LENGTH(cust_first_name), -2)=’a’;



A.

SELECT cust_first_nameFROM customersWHERE INSTR(cust_first_name, ‘e’)<>0
ANDSUBSTR(cust_first_name, -2, 1)=’a’;




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