Online Access Free Oracle.1Z0-083.v2022-12-23.q164 Practice Test (Page 23)

1Z0-083 Exam Question 106

Which two are true about memory advisors? (Choose two.)

A.If Automatic Memory Management is enabled, no memory advisors are available.

B.If Automatic Memory Management is enabled, the Shared Pool Advisor and Buffer Cache Advisor are available to set the maximum size for these individual System Global Area components.

C.All memory advisors use data from Automatic Workload Repository.

D.If Manual Shared Memory Management is enabled, only the Shared Pool Advisor and Buffer Cache Advisor are available.

E.If Automatic Shared Memory Management is enabled, both the SGA Advisor and PGA Advisor are always available.

1Z0-083 Exam Question 107

You create a table with the PERIOD FOR clause to enable the use of the Temporal Validity feature of Oracle Database 12c. Examine the table definition: create table employees (empno number, salary number, deptid number, name varchar2(100), period for employee_time); Which three statements are true concerning the use of the Valid Time Temporal feature for the EMPLOYEES table?

A.The valid time columns employee_time_start and employee_time_end are automatically created.

B.Setting the session valid time using DBMS_FLASHBACK_ARCHIVE.ENABLE_AT_VALID_TIME sets the visibility for data manipulation language (DML), data definition language (DDL), and queries performed by the session.

C.Thesamestatementmayfilteronbothtransactiontimeandvalidtemporaltimebyusingthe AS OF TIMESTAMP and PERIOD FOR clauses.

D.The valid time columns are not populated by the Oracle Server automatically.

E.The valid time columns are visible by default when the table is described.

1Z0-083 Exam Question 108

Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)

A.The Statistics Advisor generates actions for all recommendations.

B.The Statistics Advisor can help recommend the best way to gather statistics.

C.Statistics collected using DBMS_STATS always yield the best optimizer result.

D.The number of table rows is considered when evaluating the cost of accessing a table using an index.

E.Index balanced B*Tree height is considered when evaluating the cost of using an index.

1Z0-083 Exam Question 109

Which two are true about diagnosing Oracle Database failure situations using Data Recovery Advisor? (Choose two.)

A.Using the Data Recovery Advisor LIST FAILURE command always requires that the database for which failures are to be listed is in MOUNT state.

B.Data Recovery Advisor can proactively check for failures.

C.The Data Recovery Advisor CHANGE FAILURE command can be used only to change failure priorities.

D.A failure can be closed only when it has been repaired.

E.Data Recovery Advisor can be used if a database is closed.

1Z0-083 Exam Question 110

Choose the best answer. How do you configure a CDB for local undo mode?

A.Open the CDB in read-only mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then change the CDB to read/write mode.

B.Open the CDB instance in upgrade mode. In each PDB, execute ALTER DATABASE LOCAL UNDO ON, create an UNDO tablespace, and then restart the CDB instance.

C.Open the CDB instance in restricted mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON. create an UNDO tablespace in each PDB, and then restart the CDB instance.

D.Open the CDB instance in upgrade mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then restart the CDB instance.

E.Open the CDB instance in restricted mode. In CDB$ROOT, drop the UNDO tablespace. Execute ALTER DATABASE LOCAL UNDO ON in each PDB, and then restart the CDB instance.

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1Z0-083 Exam Question 106

1Z0-083 Exam Question 107

1Z0-083 Exam Question 108

1Z0-083 Exam Question 109

1Z0-083 Exam Question 110

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