[单选]

Evaluate the following block of code：  
BEGIN DBMS_NETWORK_ACL_ADMIN.CREATE_ACL （ acl => 
’mycompany-com-permissions.xml’， principal => ’ACCT_MGR’， is_grant => TRUE， privilege => ’connect’）； 
DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL （ acl => ’mycompany-com-permissions.xml’，
host => ’*.mycompany.com’）；
END；  
What is the outcome of the above code？（）

下列不属于证据特征的是（） 客观性。 关联性。 合法性。 便利性。 对开三通（对开四通）安装时需找（）水平方向。 管线轴向。 管线纵向。 与管线45度。 与管线垂直。 Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES,DEPARTMENTS, and LOCATIONS tables. She granted SELECT privilege to Scott on this view. Which option enables Scott to eliminate the need to qualify the view with the name MARY .EMP_DEP_LOC_VU each time the view is referenced? （） Scott can create a synonym for the EMP_DEPT_LOC_VU bus using the command: CREATE PRIVATE SYNONYM EDL_VU FOR mary. EMP DEPT_LOC_VU; then he can prefix the columns with this synonymn.。 Scott can create a synonym for the EMP_DEPT_LOC_VU by using the command: CREATE SYNONYM EDL_VU FOR mary. EMP DEPT_LOC_VU; then he can prefix the columns with this synonym.。 Scott can create a synonym for the EMP_DEPT_LOC_VU by using the command: CREATE LOCAL SYNONYM EDL_VU FOR mary. EMP DEPT_LOC_VU; then he can prefix the columns with this synonym.。 Scott cannot create a synonym because synonyms can be created only for tables.。 Scott cannot create any synonym for Mary's view. Mary should create a private synonym for the view and grant SELECT privilege on that synonym to Scott.。 A medical customer has a rack with four BladeCenter H chassis that have been operating normally for several months. After installing a new rack of servers in the data center, the system administrator notices the blowers in the BladeCenters have increased their speed. Which of the following caused this problem? （） The room temperature has reached 23C (73.4F). 。 A Blade within the chassis has been shut down. 。 The ambient temperature in the data center has increased 。 One of the additional System X servers in the BladeCenter rack has failed.。 核心层网络一般采用（）结构，以可满足对高可靠性的要求（） 星形。 树形。 环形或全网状。 总线型。

Evaluate the following block of code：  
BEGIN DBMS_NETWORK_ACL_ADMIN.CREATE_ACL （ acl => 
’mycompany-com-permissions.xml’， principal => ’ACCT_MGR’， is_grant => TRUE， privilege => ’connect’）； 
DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL （ acl => ’mycompany-com-permissions.xml’，
host => ’*.mycompany.com’）；
END；  
What is the outcome of the above code？（）