Which of the following servers would execute SQL？（）

A、 Database Server

B、 DNS Server

C、 NAS Server

D、 Web Server

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  A、90

  B、100

  C、110

  D、120

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• You want to customize access to the corporate network so that agentiess users are instructed to obtain a certificatebefore accessing the network.Which two configurations solve this problem? （）

  A

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  B

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  C

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  A

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  B

   local

  C

   -8：00

  D

   dbtimezone Li

  E

   Australia

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• View the Exhibit and examine the structure of the EMP table. You executed the following command to add a primary key to the EMP table：   ALTER TABLE emp   ADD CONSTRAINT emp_id_pk  PRIMARY KEY （emp_id）   USING INDEX emp_id_idx；   Which statement is true regarding the effect of the command？（）

  A、  The PRIMARY KEY is created along with a new index.

  B、  The PRIMARY KEY is created and it would use an existing unique index.

  C、  The PRIMARY KEY would be created in a disabled state because it is using an existing index.

  D、  The statement produces an error because the USING clause is permitted only in the CREATE TABLE command.

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• Which statement is true regarding Flashback Version Query？（）

  A、 It returns versions of rows only within a transaction.

  B、 It can be used in subqueries contained only in a SELECT statement.

  C、 It will return an error if the undo retention time is less than the lower bound time or SCN specified.

  D、 It retrieves all versions including the deleted as well as subsequently reinserted versions of the rows.

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