What is the purpose of a role、

试卷相关题目

• 1If a user has been granted SYSCTRL authority, which activities can they perform、

  A.Load operations

  B.Backup/copy table spaces

  C.Create and drop databases

  D.Monitor database performance

  开始考试点击查看答案
• 2In a trusted context environment, if a switch request is made with an authorization ID that is not allowed on a trusted connection, what state is the connection placed in、

  A.Locked

  B.Waiting

  C.Pending

  D.Unconnected

  开始考试点击查看答案
• 3Which SQL statement should be used to select the minimum and maximum salaries (SALARY), by job code (JOB), from a table EMPLOYEE、

  A.SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job;

  B.SELECT job, MIN(salary), MAX(salary) FROM employee ORDER BY job;

  C.SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job, MIN(salary), MAX(salary);

  D.SELECT JOB, MIN(salary), MAX(salary) FROM employee ORDER BY job, MIN(salary), MAX(salary);

  开始考试点击查看答案
• 4Which statement about application-period temporal tables is true、

  A.Consists of explicitly-supplied timestamps and a separate associated history table.

  B.Is based on explicitly-supplied timestamps that define the time periods during which data is valid.

  C.Is useful when one wants to keep both user-based period information and system-based historical information.

  D.Consists of a pair of columns with database-manager maintained values that indicate the period when a row is current.

  开始考试点击查看答案
• 5Which statement about INSERT operations is true、

  A.The INSERT statement is used to insert rows into a table, view, or table function.

  B.Inserted values must satisfy the conditions of any check constraints defined on the table.

  C.If an INSERT statement omits any column from the inserted row that is defined as NULL or NOT NULL WITH DEFAULT, the statement will fail.

  D.If the underlying table of a view being referenced by an INSERT statement has one or more unique indexes, each row inserted does not have to conform to the constraints imposed by those indexes.

  开始考试点击查看答案
• 6Which SQL statement will give user USER1 the ability to assign a comment to a sequence named MYSEQ、

  A.GRANT ALTER ON SEQUENCE myseq TO user1

  B.GRANT USAGE ON SEQUENCE myseq TO user1

  C.GRANT SELECT ON SEQUENCE myseq TO user1

  D.GRANT COMMENT ON SEQUENCE myseq TO user1

  开始考试点击查看答案
• 7A column mask that is to be used for row and column access control (RCAC) was created with the DISABLE option specified. What must be done if this mask is to be used to restrict access to data storedin a table named EMPLOYEE、

  A.The column mask must be enabled; the EMPLOYEE table must be altered to activate column access control.

  B.The column mask must be enabled (column access control for the EMPLOYEE table will be activated automatically).

  C.The EMPLOYEE table must be altered to activate column access control (the column mask will be enabled automatically).

  D.The EMPLOYEE table must be altered to activate column access control; row permission must be granted to everyone who needs to use thecolumn mask.

  开始考试点击查看答案
• 8User USER1 holds both DBADM and SECADM authority and you want to separate databaseadministration activities from security administration tasks. What authority must you have in order to revoke SECADM authority from user USER1 and assign it to someone else、

  A.DBADM

  B.DBCTRL

  C.SECADM

  D.DBMAINT

  开始考试点击查看答案
• 9A table named EMPLOYEE was created as follows:  CREATE TABLE employee  (emp_id INTEGER NOT NULL PRIMARY KEY,   f_name VARCHAR(30),   l_name VARCHAR(40),   ssn    CHAR(9) NOT NULL) Which action will prevent unauthorized users from accessing SSN data、

  A.Assign the SSN column to a restricted role that only authorized users can access.

  B.Only grant ACCESSCTRL authority for the SSN column to users who need to access SSN data.

  C.Alter the table definition so that SSN data is stored in a separate schema that only authorized users can access.

  D.Create a view for the EMPLOYEE table that does not contain the SSN column and requireunauthorized users to use the view.

  开始考试点击查看答案
• 10Which SQL statement will allow user USER1 to create a view on a table named EMPLOYEE、

  A.GRANT CREATETAB ON DATABASE TO user1

  B.GRANT SELECT ON TABLE employee TO user1

  C.GRANT CREATEVIEW ON DATABASE TO user1

  D.GRANT REFERENCES ON TABLE employee TO user1

  开始考试点击查看答案