多选题A database user SMITH tries to query the V$SESSION view and fails to access it as follows： SQL connect smith/smith  Connected.  SQL SELECT * FROM v$session；  SELECT * FROM v$session *  ERROR at line 1：  ORA-00942： table or view does not exist  Which ar

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第4题：

Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?（）

• A、SELECT COUNT(*) FROM employees WHERE last_name='Smith';
• B、SELECT COUNT(dept_id) FROM employees WHERE last_name='Smith';
• C、SELECT DISTINCT(COUNT(dept_id)) FROM employees WHERE last_name='Smith';
• D、SELECT COUNT(DISTINCT dept_id) FROM employees WHERE last_name='Smith';
• E、SELECT UNIQUE(dept_id) FROM employees WHERE last_name='Smith';

第5题：

A new report process containing a complex query is written, with high impact on the database. You wantto collect basic statistics about query, such as the level of parallelism, total database time, and the number of I/O requests. For the database instance STATISTICS_LEVEL, the initialization parameter is set to TYPICAL and theCONTROL_MANAGEMENT_PACK_ACCESS parameter is set to DIAGNOSTIC+TUNING. What should you do to accomplish this task?（）

• A、Execute the query and view Active Session History (ASH) for information about the query.
• B、Enable SQL trace for the query.
• C、Create a database operation, execute the query, and use the DBMS_SQL_MONITOR. REPORT_SQL_MONITOR function to view the report.
• D、Use the DBMS_APPLICATION_INFO.SET_SESSION_LONGOPS procedure to monitor query execution and view the information from the V$SESSION_LONGOPS view.

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第7题：

Your database interface is running. A user SCOTT starts a SQL *Plus session, and issues the following query: SQL> SELECT * FROM sales; Which process would retrieve the result from the database and return it to the client program?（）

• A、User process
• B、Server process
• C、System Monitor (SMON)
• D、Process Monitor (PMON)
• E、Checkpoint process (CKPT)

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第9题：

Your database operates in ARCHIVELOG mode. User/x7fmanaged consistent backups are performed every Sunday night.  On Tuesday， client A drops a table at 8：00 a.m. as follows：  SQL> DROP TABLE cust_ord PURGE;  Table dropped.  Client B executes a query at 9：00 a.m. on the same table as follows：  SQL> SELECT * FROM cust_ord; SELECT * FROM cust_ord *  ERROR at line 1：  ORA/x7f00942： table or view does not exist  Client B needs the dropped table and reports the problem to you. With reference to this scenario， which action should you take？（）

• A、retrieve the table by using the flashback feature
• B、restore all the data files from last Sunday’s backup， and then perform a time­based recovery
• C、restore all the data files from last Sunday’s backup， and then perform a log sequence recovery
• D、restore all the data files from last Sunday’s backup， and then perform a cancel­based recovery
• E、restore from last Sunday’s backup only data files that belong to the tablespace in which the table was stored， and then perform a complete recovery

第10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.