1Z0-117 무료 덤프문제 온라인 액세스

View the code sequence:

Examine the Exhibit to view the execution plan.


Which two statements are true about the query execution?

• A.The CUSTOMERS and ORDERS tables are joined first and the resultant is then joined with rows returned by the ORDER_ITEMS table.
• B.The CUSTOMERS and ORDER_ITEMS tables are joined first the resultant is then joined with rows by the ORDERS table.
• C.The optimizer has chosen hash join as an access method as the OPTIMIZER_MODE parameter is set to FIRST_ROWS.
• D.The optimizer joins specified tables in the order as they appear in the FROM clause.

Which two statements are true about the trcsess utility?

• A.It merges multiple trace files and produces a formatted output file.
• B.It merges files pertaining to a user session scattered across different processes in a shared server configuration.
• C.It produces multiple files for a service, which can be consolidated into one formatted file using the tkprof utility.
• D.It produces multiple files only for DBA sessions, which can be consolidated into one formatted file using the tkprof utility.
• E.It merges multiple trace files from a particular session into one single trace file.

View the exhibit and examine the plans in the SQL baseline for a given statement. Which interpretation is correct?

• A.Plan SYS_SQL_PLAN_bbdc741f554c408 will always be used by the optimizer for the query.
• B.Plan SYS_SQL_PLAN_bbedc741f554c408 will not be used until it is fixed by using the DBMS_SPM.EVOLVE_SQL_PLAN_BASELINE function.
• C.A new plan must be evolved using the DBMS_SPM.EVOLVE_SQL_PLAN_BASELINE function before it can be used.
• D.A new plan cannot be evolved because SYS_SQL_bbedc41f554c408 is accepted.
• E.Plan SYS_SQL_bbedc741a57b5fc2 can be used by the optimizer if the cost of the query is less than plan SYS_SQL_PLAN_bbedc741f554c408.

Examine the Exhibit1 to view the structure of an indexes for the EMPLOYEES table.

Examine the query:
SQL> SELECT * FROM employees WHERE employees_id IN (7876, 7900, 7902);
EMPLOYEE_ID is a primary key in the EMPLOYEES table that has 50000 rows.
Which statement is true regarding the execution of the query?

• A.The query uses an index skip scan on the EMP_EMP_ID_PK index to fetch the rows.
• B.The query uses the INLIST ITERATOR operator to iterate over the enumerated value list, and values are evaluated using an index range scan on the EMP_EMP_ID_PK index.
• C.The query uses the INLIST ITERATOR operator to iterate over the enumerated value list, and values are evaluated using a fast full index scan on the EMP_EMP_ID_PK index.
• D.The query uses the INLIST ITERATOR operator to iterate over the enumerated value list, and values are evaluated using an index unique scan on the EMP_EMP_ID_PK index.
• E.The query uses a fast full index scan on the EMP_EMP_ID_PK index fetch the rows.

Examine the following query and execution plan:

Which query transformation technique is used in this scenario?

• A.Join conversion
• B.Subquery factoring
• C.Subquery unnesting
• D.Join predicate push-down