单选题What is true about the WITH GRANT OPTION clause?（）A It allows a grantee DBA privileges.B It is required syntax for object privileges.C It allows privileges on specified columns of tables.D It is used to grant an object privilege on a foreign key column

第1题：

When defining a referential constraint between the parent table T2 and the dependent table T1, which of the following is true?（）

• A、The list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.
• B、The list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.
• C、The list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.
• D、The list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.

第2题：

Which two statements are true about constraints? （）

• A、The UNIQUE constraint does not permit a null value for the column.
• B、A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.
• C、The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.
• D、The NOT NULL constraint ensures that null values are not permitted for the column.

第3题：

The HR user creates a view with this command：  SQL> CREATE VIEW emp_v AS SELECT * FROM scott.emp；  Now HR wants to grant the SELECT privilege on the EMP_V view to the JIM user.  Which statement is true in this scenario？（）

• A、HR can grant the privilege to JIM but without GRANT OPTION.
• B、HR can grant the privilege to JIM because HR is the owner of the view.
• C、SCOTT has to grant the SELECT privilege on the EMP table to JIM before this operation.
• D、HR needs the SELECT privilege on the EMP table with GRANT OPTION from SCOTT for this operation.

第4题：

You need to give the MANAGER role the ability to select from, insert into, and modify existing rows in the STUDENT_GRADES table. Anyone given this MANAGER role should be able to pass those privileges on to others. Which statement accomplishes this? （）

• A、GRANT select, insert, update ON student_grades TO manager
• B、GRANT select, insert, update ON student_grades TO ROLE manager
• C、GRANT select, insert, modify ON student_grades TO manager WITH GRANT OPTION;
• D、GRANT select, insert, update ON student_grades TO manager WITH GRANT OPTION;
• E、GRANT select, insert, update ON student_grades TO ROLE manager WITH GRANT OPTION;  
• F、GRANT select, insert, modify ON student_grades TO ROLE manager WITH GRANT OPTION;

第5题：

Which three statements are true about the working of system privileges in a multitenant control database(CDB) that has pluggable databases (PDBs)?（）

• A、System privileges apply only to the PDB in which they are used.
• B、Local users cannot use local system privileges on the schema of a common user.
• C、The granter of system privileges must possess the set container privilege.
• D、Common users connected to a PDB can exercise privileges across other PDBs.
• E、System privileges with the with grant option container all clause must be granted to a common user before the common user can grant privileges to other users.

第6题：

What is true about the WITH GRANT OPTION clause?（）

• A、It allows a grantee DBA privileges.
• B、It is required syntax for object privileges.
• C、It allows privileges on specified columns of tables.
• D、It is used to grant an object privilege on a foreign key column.
• E、It allows the grantee to grant object privileges to other users and roles.

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第13题：

What is true about joining tables through an equijoin?（）

• A、You can join a maximum of two tables through an equijoin.
• B、You can join a maximum of two columns through an equijoin.
• C、You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.
• D、To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.
• E、You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.

第14题：

In your Certkiller .com production database， you find that the database users are able to create and read files with unstructured data， available in any location on the host machine from an application.  You want to restrict the database users to access files in a specific location on the host machine.  What could do to achieve this？（）

• A、Modify the value for the UTL_FILE_DIR parameter in the parameter file
• B、Grant read and write privilege on the operating system path to the database users
• C、Modify the value for the LDAP_DIRECTORY_ACCESS parameter in the parameter file
• D、Modify the value for the PLSQL_NATIVE_LIBRARY_DIR parameter in the parameter file
• E、Create a directory object referring to the operating system path， and grant read and write privilege on the directory object to the database users

第15题：

The DBA issues this SQL command: CREATE USER scott IDENTIFIES by tiger; What privileges does the user Scott have at this point?（）

• A、No privileges.
• B、Only the SELECT privilege.
• C、Only the CONNECT privilege.
• D、All the privileges of a default user.

第16题：

Examine the commands executed in the following sequence：  1：SQL> CREATE ROLE mgrrole；  2：SQL> GRANT create user，select any table，connect，resource TO mgrrole；  3：SQL> GRANT select，update ON sh.sales TO mgrrole；  4：SQL> CREATE ROLE ceo IDENTIFIED BY boss；  5：SQL> GRANT mgrrole，drop any table，create any directory TO ceo；  6：SQL> GRANT ceo TO mgrrole；  Which statement is true about the above commands（）

• A、The commands execute successfully.
• B、Command 6 produces an error because of circular role grant.
• C、Command 5 produces an error because a role cannot be granted to another role.
• D、Command 3 produces an error because the MGRROLE role already contains system privileges.
• E、The table created by HR remains and HR still has the CREATE TABLE system privilege.
• F、The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.

第17题：

The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command：  SQL> GRANT SELECT，INSERT，UPDATE ON emp TO scott WITH GRANT OPTION； The user SCOTT executes this command to grant privileges to the user JIM： SQL> GRANT SELECT，INSERT，UPDATE ON hr.emp TO jim；  Now， the user HR decides to revoke privileges from JIM using this command： SQL> REVOKE SELECT，INSERT，UPDATE ON emp FROM jim； Which statement is true after HR issues the REVOKE command（）

• A、The command fails because SCOTT still has privileges.
• B、The command succeeds and privileges are revoked from JIM.
• C、The command fails because HR cannot revoke the privileges from JIM.
• D、The command succeeds and only HR has the privilege to perform the SELECT， INSERT， and UPDATEoperations on the EMP table.

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