Free Access Oracle.1Z0-082.v2023-03-31.q49 Practice Test (Page 10)

Question 41

Which three statements are true about the tools used to configure Oracle Net Services? (Choose three.)

A.The Oracle Net Configuration Assistant is only used when running the Oracle installer

B.Oracle Net Manager can be used to centrally configure listeners on any database server target

C.The lsnrctl utility requires a listener.ora file to exist before it is started

D.Oracle Net Manager can be used to locally configure naming methods on a database server

E.Enterprise Manager Cloud Control can be used to centrally configure listeners on any managed database server

F.Enterprise Manager Cloud Control can be used to centrally configure net service names for any database server target

Question 42

Which three statements are true about the DESCRIBE command? (Choose three.)

A.It can be used to display the structure of an existing view

B.It displays the NOT NULL constraint for any columns that have that constraint

C.It can be used from SQL Developer

D.It displays all constraints that are defined for each column

E.It displays the PRIMARY KEY constraint for any column or columns that have that constraint

F.It can be used only from SQL*Plus

Question 43

Which three statements are true about data block storage in an Oracle Database?

A.Row data is stored starting at the end of the block.

B.A table block must always contain row data.

C.A block header contains a row directory pointing to all rows in the block.

D.An index block can contain row data.

E.A data block header is of a fixed length.

Question 44

In the promotions table, the PROMO_BEGIN_DATE column is of data type date and the default date format Is DD-MON-RR.
h two statements are true about expressions using PROMO_BEGIN_DATE contained In a query?

A.TO_date(PROMO_ BEGIN_DATE * 5| will return a date.

B.to_numberipromo_begin_date) - s will return a number.

C.PROMO_ BEGIN_DATE - sysdate will return a number.

D.PROMO_ BEGIN_DATE - 5 will return a date.

E.PROMO_ BEGIN_DATE - sysdate will return an error.

Question 45

Which three statements are true about dropping and unused columns in an Oracle database? (Choose three.)

A.A column that is set to UNUSED still counts towards the limit of 1000 columns per table

B.An UNUSED column's space is reclaimed automatically when the block containing that column is next queried.

C.A primary key column referenced by another column as a foreign key can be dropped if using the CASCADE option.

D.A DROP COLUMN command can be rolled back

E.An UNUSED column's space is reclaimed automatically when the row containing that column is next queried.

F.Partition key columns cannot be dropped.

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