Free Access Oracle.1z0-062.v2022-12-05.q411 Practice Test (Page 32)

Question 151

Which three factors influence the optimizer's choice of an execution plan? (Choose three.)

A.the optimizer_mode initialization parameter

B.operating system (OS) statistics

C.cardinality estimates

D.object statistics in the data dictionary

E.fixed baselines

Question 152

You executed this command to create a password file:
$ orapwd file = orapworcl entries = 10 ignorecase = N
Which two statements are true about the password file? (Choose two.)

A.It will permit the use of uppercase passwords for database users who have been granted the SYSOPER role.

B.It contains username and passwords of database users who are members of the OSOPER operating system group.

C.It contains usernames and passwords of database users who are members of the OSDBA operating system group.

D.It will permit the use of lowercase passwords for database users who have granted the SYSDBA role.

E.It will not permit the use of mixed case passwords for the database users who have been granted the SYSDBA role.

Question 153

Your database supports an online transaction processing (OLTP) workload in which one of the applications
creates a temporary table for a session and performs transactions on it. This consumes a lot of undo
tablespace and generates lots of redo.
Which two actions would you take to solve this problem? (Choose two.)

A.Enable Automatic Memory Management (AMM).

B.Increase the size of the temporary tablespace.

C.Increase the size of the redo log buffer.

D.Enable undo retention guarantee.

E.Enable temporary undo for the database.

Question 154

Examine the parameters:

Users complain that their sessions for certain transactions hang. You investigate and discover that some users fail to complete their transactions, causing other transactions to wait on row-level locks.
Which two actions would you take to prevent this problem? (Choose two.)

A.Set a limit in the proles of blocking users to control the number of data blocks that can be accessed in a session.

B.Decrease the SESSIONS_PER_USER limit in the profiles assigned to blocking users.

C.Decrease the IDLE_TIME resource limit in the profiles assigned to blocking users.

D.Use Database Resource Manager to automatically kill the sessions that are idle and are blocking other sessions.

E.Increase the maximum number of ITL slots for segments on which a blocking user performs a transaction.

Question 155

Examine the following command:
CREATE TABLE (prod_id number(4),
Prod_name varchar2 (20),
Category_id number(30),
Quantity_on_hand number (3) INVISIBLE);
Which three statements are true about using an invisible column in the PRODUCTS table?

A.The %ROWTYPE attribute declarations in PL/SQL to access a row will not display the invisible column in the output.

B.The DESCRIBE commands in SQL *Plus will not display the invisible column in the output.

C.Referential integrity constraint cannot be set on the invisible column.

D.The invisible column cannot be made visible and can only be marked as unused.

E.A primary key constraint can be added on the invisible column.

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Question 151

Question 152

Question 153

Question 154

Question 155

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