多选题Which  statements are true regarding listeners（）AListeners use only the TCP/IP protocol.BMultiple listener processes can run simultaneously on a host.CMultiple database instances can be registered with a single listener.DThe listener-related errors can

第1题：

Which statement is true regarding Dynamic Service Registration？（）

• A、Dynamic service registration requires configuration in the listener .ora file.
• B、Dynamic service registration can be used only with an Oracle9/instance.
• C、Dynamic service registration cannot register a local listener that does not use TCP/IP or port 1521.
• D、The PMON background process automatically registers each database instance if the necessary parameters have been set in the database initialization parameter file.

第2题：

Which two statements regarding external authentication servers for firewall userauthentication are true？（）

• A、Up to three external authentication server types can be used simultaneously.
• B、Only one external authentication server type can be used simultaneously.
• C、If the local password database is not configured in the authentication order， and the configured authentication server is unreachable， authentication is not performed.
• D、If the local password database is not configured in the authentication order， and the configured authentication server rejects the authentication request， authentication is not performed

第3题：

第4题：

Which three statements about subqueries are true?（）

• A、A single row subquery can retrieve only one column and one row.
• B、A single row subquery can retrieve only one row but many columns.
• C、A multiple row subquery can retrieve multiple rows and multiple columns.
• D、A multiple row subquery can be compared by using the ">" operator.
• E、A single row subquery can use the IN operator.
• F、A multiple row subquery can use the "=" operator.

第5题：

Which  statements are true regarding listeners（）

• A、Listeners use only the TCP/IP protocol.
• B、Multiple listener processes can run simultaneously on a host.
• C、Multiple database instances can be registered with a single listener.
• D、The listener-related errors can be traced only at the administrative level.
• E、Only one database instance can be registered with a single listener at any time

第6题：

Which of the following technologies can detect and fix single bit memory errors?（）

• A、RAID
• B、Registered memory
• C、SDRAM
• D、ECC

第7题：

Which two statements are true about the Automatic Diagnostic Repository （ADR）？（） 

• A、 The ADR base keeps all diagnostic information in binary format
• B、 SQL*Plus provides the ADRI script， which can be used to work with ADR
• C、 The ADR can be used for problem diagnosis only when the database is open
• D、 The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null
• E、 The ADR can be used for problem diagnosis even when the database instance is down
• F、 The ADR base is shared across multiple instances

第8题：

第9题：

Which three statements are true regarding the use of the Database Migration Assistant for Unicode(DMU)?（）

• A、A DBA can check specific tables with the DMU
• B、The database to be migrated must be opened read-only.
• C、The release of the database to be converted can be any release since 9.2.0.8.
• D、The DMU can report columns that are too long in the converted characterset.
• E、The DMU can report columns that are not represented in the converted characterset.

第10题：

Which two statements are true regarding hot patching？（）

• A、 It requires relinking of the Oracle binary.
• B、 It does not require database instance shutdown.
• C、 It can detect conflicts between two online patches.
• D、 It is available for installing all patches on all platforms. 
• E、 It works only in a single database instance environment.