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【单项选择题】

Which statement can be an inference from the output?（）

A、A. The FRA disk group has an asynchronous I/O bottleneck

B、B. The least number of I/Os are performed on the last data file in the list

C、C. The number of times that the backup or restore process directed the OS to wait until an I/O was complete is the highest for the last data file in the list

D、D. The number of times that the backup or restore process made an OS call to poll for I/O completion in Nonblocking mode is the least for the FRA disk group

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第1题
[多选题] Which three are true?（）

A、A MERGE statement is used to merge the data of one table with data from another.  B、A MERGE statement replaces the data of one table with that of another.  C、A MERGE statement can be used to insert new rows into a table.  D、A MERGE statement can be used to update existing rows in a table.  

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第2题
[多选题] Which three are true? （）

A、A MERGE statement is used to merge the data of one table with data from another.  B、A MERGE statement replaces the data of one table with that of another.  C、A MERGE statement can be used to insert new rows into a table.  D、A MERGE statement can be used to update existing rows in a table.  

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第3题
[多选题] Which two statements are true regarding the SQL Repair Advisor?（）

A、The SQL Repair Advisor can be invoked to tune the performance of the regressed SQL statements.  B、The SQL Repair Advisor can be invoked even when the incident is not active for a SQL statement crash.  C、The SQL Repair Advisor is invoked by the Health Monitor when it encounters the problematic SQL statement.  D、The DBA can invoke the SQL Repair Advisor when he or she receives an alert generated when a SQL statement crashes and an incident is created in the ADR.  

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第4题
[多选题] An administrator account is granted the CREATE SESSION and SET CONTAINER system privileges. A multitenant container database (CDB) instant has the following parameter set: THREADED_EXECUTION = FALSE Which four statements are true about this administrator establishing connections to root in a CDB that has been opened in read only mode?（）

A、You can conned as a common user by using the connect statement.  B、You can connect as a local user by using the connect statement.  C、You can connect by using easy connect.  D、You can connect by using OS authentication.  E、You can connect by using a Net Service name.  F、You can connect as a local user by using the SET CONTAINER statement.  

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第5题
[多选题] By default, which two statements are true about export routing polices?（）

A、Export polices can evaluate only active routes  B、Export polices can evaluate all routes  C、Export polices can be applied to the forwarding table  D、Export polices can be applied to interfaces  

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第6题
[多选题] Which statements are true regarding the Query Result Cache? （）

A、It can be set at the system, session, or table level.  B、It is used only across statements in the same session.  C、It can store the results from normal as well as flashback queries.  D、It can store the results of queries based on normal, temporary, and dictionary tables.  

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第7题
[多选题] By default, which two statements are true about export routing policies?（）

A、Export policies can evaluate only active routes  B、Export policies can evaluate all routes  C、Export policies can be applied to the forwarding table  D、Export policies can be applied directly to interfaces  

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第8题
[多选题] You have enabled resumable space allocation in your database by setting the RESUMABLE_TIMEOUTparameter set to a nonzero value.Which three statements about resumable space allocation are true? （）(Choose three.)

A、Even with resumable space allocation enabled for your database, you can disable resumable space allocation for a single session.  B、A resumable statement is suspended only if an out of space error occurs.  C、When a resumable statement is suspended, the transaction that contains the statement is also suspended.  D、A resumable statement can only be suspended and resumed once during the execution of the statement.  E、You can query the V$SESSION_WAIT dynamic performance view to identify the statements that are suspended for a session  

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第9题
[多选题] Which two statements about views are true?（）

A、A view can be created as read only.  B、A view can be created as a join on two or more tables.  C、A view cannot have an ORDER BY clause in the SELECT statement.  D、A view cannot be created with a GROUP BY clause in the SELECT statement.  E、A view must have aliases defined for the column names in the SELECT statement.  

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第10题
[多选题] Which two statements about views are true? （）

A、A view can be created as read only.  B、A view can be created as a join on two or more tables.  C、A view cannot have an ORDER BY clause in the SELECT statement.  D、A view cannot be created with a GROUP BY clause in the SELECT statement.  E、A view must have aliases defined for the column names in the SELECT statement.  

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