Online Access Free 1z0-062 Practice Test

Examine the parameter for your database instance:

You generated the execution plan for the following query in the plan table and noticed that the nested loop join was done. After actual execution of the query, you notice that the hash join was done in the execution plan:

Identify the reason why the optimizer chose different execution plans.

• A.The optimizer chose different plans because automatic dynamic sampling was enabled.
• B.The optimizer chose different plan because extended statistics were created for the columns used.
• C.The optimizer used re-optimization cardinality feedback for the query.
• D.The optimizer used a dynamic plan for the query.

Which two utilities can NOT configure a new listener on port 1526? (Choose two.)

• A.asmca
• B.dbca
• C.lsnrctl
• D.netmgr
• E.netca

Which two tools can be used to configure static service information in the listener.ora file? (Choose two.)

• A.Oracle Net Configuration Assistant
• B.Oracle Net Manager
• C.Listener Control Utility (LSNRCTL)
• D.Oracle Enterprise Manager Cloud Control
• E.Oracle Enterprise Manager Database Express

Examine this command executed on a client that is remote from the database server.
SQL> CONNECT hr/hr@orcl
Which two are required for this command to connect the SQLPLUS client to a database instance? (Choose two.)

• A.The service name orcl must be defined to the listener
• B.An orcl TNS entry must be defined in the client-side and server-side tnsnames.ora files
• C.A service name must be defined to the listener that matches the service name in the orcl TNS entry
• D.An orcl TNS entry must be defined in the server-side tnsnames.ora file
• E.An orcl TNS entry must be defined in the client-side tnsnames.ora file

One of your databases supports an OLTP workload.
The default UNDO tablespace is fixed size with:
1. RETENTION NOGUARANTEE
2. UNDO_RETENTION is 12 minutes
User SCOTT gets this error after a query on the SALES table has run for more than 15 minutes:
ORA-01555: snapshot too old
Which three factors taken separately or in some combination might be the cause? (Choose three.)

• A.An update was made to the SALES table after the query began
• B.An uncommitted update to the SALES table was made more than 12 minutes before the query began
• C.A committed update to the SALES table was made more than 12 minutes before the query began
• D.An update to the SALES table was committed after the query began
• E.An update was made to the SALES table before the query began
• F.A committed delete to the SALES table was made more than 12 minutes before the query began
• G.An uncommitted delete to the SALES table was made more than 12 minutes before the query began