Free Access Oracle.1z0-071.v2022-08-30.q239 Practice Test (Page 48)

Question 231

Examine this partial command:

Which two clauses are required for this command to execute successfully? (Choose two.)

A.the access driver TYPEclause

B.the DEFAULT DIRECTORYclause

C.the REJECT LIMITclause

D.the ACCESS PARAMETERSclause

E.the LOCATIONclause

Question 232

Examine the structure of the CUSTOMERS table: (Choose two.)

CUSTNO is the PRIMARY KEY.
You must determine if any customers' details have been entered more than once using a different CUSTNO, by listing all duplicate names.
Which two methods can you use to get the required result?

A.Self-join

B.Left outer-join with self-join

C.Right outer-join with self-join

D.Full outer-join with self-join

E.Subquery

Question 233

Examine the structure of the EMPLOYEEStable.

There is a parent/child relationship between EMPLOYEE_IDand MANAGER_ID.
You want to display the last names and manager IDs of employees who work for the same manager as the employee whose EMPLOYEE_IDis 123.
Which query provides the correct output?

A.SELECT e.last_name, m.manager_id
FROM employees e LEFT OUTER JOIN employees m
on (e.employee_id = m.manager_id)
WHERE e.employee_id = 123;

B.SELECT e.last_name, m.manager_id
FROM employees e RIGHT OUTER JOIN employees m
on (e.manager_id = m.employee_id)
AND e.employee_id = 123;

C.SELECT m.last_name, e.manager_id
FROM employees e LEFT OUTER JOIN employees m
on (e.manager_id = m.manager_id)
WHERE e.employee_id = 123;

D.SELECT e.last_name, e.manager_id
FROM employees e RIGHT OUTER JOIN employees m
on (e.employee_id = m.employee_id)
WHERE e.employee_id = 123;

Question 234

Which three statements are true about indexes and their administration in an Oracle database?

A.A DROP INDEX statement always prevents updates to the table during the drop operation

B.An INVISIBLE index is not maintained when Data Manipulation Language (DML) is performed on its underlying table.

C.An index can be created as part of a CREATE TABLE statement.

D.A descending index is a type of function-based index

E.If a query filters on an indexed column then it will always be used during execution of the query

F.A UNIQUE and non-unique index can be created on the same table column

Question 235

Which two will execute successfully?

A.SELECT NVL('DATE',200) FROM (SELECT NULL AS "DATE" FROM DUAL);

B.SELECT COALESCE(O,SYSDATE) TRCH DUAL;

C.SELECT COALESCE('DATE',SYSDATE) FROM (SELECT NULL AS "DATE" FROM DUAL) ;

D.SELECT NVL('DATE',SYSDATE) FROM DUAL;

E.SELECT COALESCR('DATE', SYSDATE) FROM DUAL;

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Question 231

Question 232

Question 233

Question 234

Question 235

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