A 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、

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• 1Which 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

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• 2What is the purpose of a role、

  A.To define exactly what a specific user can do within a particular database once they have been authenticated.

  B.To group a collection of privileges together so that they can be simultaneously granted to and revoked from multiple users.

  C.To establish a credible relationship between DB2 and an external entity, such as a database administrator or a middleware server.

  D.To group a collection of users together so that they can be simultaneously granted and revoked specific authorities and privileges.

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• 3If 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

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• 4In 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

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• 5Which 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);

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• 6User 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

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• 7A 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.

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• 8Which 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

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• 9A new user named USER1 needs to retrieve information from a database named MYDB. Whatauthority must be granted to user USER1、

  A.DBCTRL authority

  B.SQLADM authority

  C.DATAACCESS authority

  D.ACCESSCTRL authority

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• 10Which privilege is required to invoke a user defined function、

  A.CALL

  B.USAGE

  C.EXECUTE

  D.REFERENCES

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