单选题A user issues a SELECT command against the Oracle database. Which of the following choices describes a step that Oracle will execute in support of this statement?（）A Acquire locks on table queried B Generate redo for statement C Fetch data from disk in

第1题：

Which statement correctly describes SQL and /SQL*Plus?（）

• A、Both SQL and /SQL*plus allow manipulation of values in the database.
• B、/SQL* Plus recognizes SQL satement and sends them to the server; SQL is the Oracle proprietary interface for executing SQL statements.
• C、/SQL* Plus language for communicating with the Oracle server to access data; SQL recognizes SQL statements and sends them to the server.
• D、/SQL manipulates data and table definition in the database; /SQL* Plus does not allow manipulation of values in the database.

第2题：

From SQL*Plus, you issue this SELECT statement: SELECT* FROM order; You use this statement to retrieve data from a data table for （）.

• A、Updating
• B、Viewing
• C、Deleting
• D、Inserting
• E、Truncating

第3题：

第4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.

第5题：

The user is trying to execute a SELECT statement. Which of the following background processes will obtain data from a disk for the user?（）

• A、DISPATCHER 
• B、USER 
• C、SERVER 
• D、LGWR 
• E、 DBW0

第6题：

You just issued the following statement: ALTER TABLE SALES DROP COLUMN PROFIT. Which of the following choices identifies when the column will actually be removed from Oracle?（）

• A、Immediately following statement execution 
• B、After the ALTER TABLE DROP UNUSED COLUMNS command is issued 
• C、After the ALTER TABLE SET UNUSED COLUMN command is issued 
• D、After the ALTER TABLE MODIFY command is issued

第7题：

The user Sue issues this SQL statement: GRANT SELECT ON sue. EMP TO alice WITH GRANT OPTION; The user Alice issues this SQL statement: GRANT SELECT ON sue. EMP TO reena WITH GRANT OPTION; The user Reena issues this SQL statement: GRANT SELECT ON sue. EMP TO timber; The user Sue issues this SQL statement: REVOKE select on sue. EMP FROM alice; For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?（）

• A、Alice only
• B、Alice and Reena
• C、Alice, Reena, and Timber
• D、Sue, Alice, Reena, and Timber

第8题：

SQ L*Loader is a utility that can perform which two tasks？（）

• A、Load data from a disk， tape， or named pipes.
• B、Load data into an Oracle database using DML statements.
• C、Extract， reorganize， and insert data within an Oracle database.
• D、Load data from external files into tables in an Oracle database.
• E、Load data into an Oracle database using operating system commands.
• F、Load data directly from a non-Oracle database to an Oracle database.

第9题：

Examine the statement：   SQL> CREATE TABLESPACE user_data  2> EXTENT MANAGEMENT LOCAL  3> SEGMENT SPACE MANAGEMENT AUTO；   Which twp assumptions must be true for this statement to execute successfully？（）

• A、Oracle Managed Files are used for this instance.
• B、The USER_DATA tablespace is managed using FET$/UET$ tables.
• C、The COMPATIBLE initialization parameter must be 9.0.0 or higher.
• D、Space within segments in the USER_DATA tablespace is managed with freelists.

第10题：

You issue the following statement：   SQL> SELECT FIRSTNAME， LASTNAME FROM HR.EMPLOYEE；  You receive the following error：         01578： ORACLE data block corrupted （file# 6， block # 54）        ORA-01110 ： data file 6： ’u01/oracle/oradata/data1.dbf’   How will you resolve this problem of data block corruption by reducing the mean time to recover （MTTR）？（）

• A、 by using the DBMS_REPAIR package
• B、 by using the DBVERIFY utility
• C、 by using Block Media Recovery
• D、 by issuing the ANALYZE TABLE HR.EMPLOYEES VALIDATE STRUCTURE command