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Oracle认证考试 问题列表
问题
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) SAL NUMBER MGR_ID NUMBER DEPARTMENT_ID NUMBER You want to create a SQL script file that contains an INSERT statement. When the script is run, the INSERT statement should insert a row with the specified values into the EMPLOYEES table. The INSERT statement should pass values to the table columns as specified below: EMPLOYEE_ID: Next value from the sequence EMP_ID_SEQEMP_NAME and JOB_ID: As specified by the user during run time, through substitution variables SAL: 2000 MGR_ID: No value DEPARTMENT_ID: Supplied by the user during run time through substitution variable. The INSERT statement should fail if the user supplies a value other than 20 or 50. Which INSERT statement meets the above requirements?（）A、INSERT INTO employees VALUES (emp_id_seq.NEXTVAL, ename','jobid', 2000, NULL, did);B、INSERT INTO employees VALUES (emp_id_seq.NEXTVAL, 'ename', 'jobid', 2000, NULL, did IN (20,50));C、INSERT INTO (SELECT * FROM employees WHERE department_id IN (20,50)) VALUES (emp_id_seq.NEXTVAL, ename','jobid', 2000, NULL, did);D、INSERT INTO (SELECT * FROM employees WHERE department_id IN (20,50) WITH CHECK OPTION) VALUES (emp_id_seq.NEXTVAL, ename','jobid', 2000, NULL, did);E、INSERT INTO (SELECT * FROM employees WHERE (department_id = 20 AND department_id = 50) WITH CHECK OPTION ) VALUES (emp_id_seq.NEXTVAL, ename','jobid', 2000, NULL, did);
问题
You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table： SQL FLASHBACK TABLE ORDERS TO SCN 771513； What is the prerequisite to perform Flashback Table？（）A、 You must configure OMF in your database.B、 You must enable block change tracking feature in your database.C、 You must enable ROW MOVEMENT feature on the ORDERS table.D、 You must use the Flashback Version Query before using the Flashback Table feature.
问题
The ORDERS table in the database of a company contains one million records. The table is stored in the DATA tablespace and the index created on the ORDERS table is stored in the index tablespace named INDEXES. On Monday， you failed to start the database because the datafiles of the INDEXES tablespace were missing. You dropped and recreated the INDEXES tablespace by issuing the following command： SQLDROP TABLESPACE INDEXES INCLUDING CONTENTS； SQL CREATE TABLESPACE INDEXES DATAFILE ’C:///ORACLE/ORADATA/ORA101t/INDEX01.DBF’ SIZE 50m； After that， you issued the following command to recreate the index： CREATE UNIQUE INDEX sales_index_pk ON sales （order_id） PCTFREE 10 INITRANS 2 MAXTRANS 255 TABLESPACE indexes STORAGE （ INITIAL 1m NEXT 1m PCTINCREASE 0 MINEXTENTS 1 MAXEXTENTS 8192 ） NOLOGGING PARALLEL（ degree 4） Which two clauses are responsible for reducing the time for the recreation of the index？（）A、 PCTFREEB、 MAXTRANSC、 PCTINCREASED、 INITIALE、 NOLOGGINGF、 PARALLEL
问题
假设在数据库中已经创建了某个用户test，需要将其口令修改为oracle，可以使用如下（）语句。A、ALTER USER test IDENTIFIED BY oracleB、ALTER USER test PASSWORD oracleC、CREATE USER test IDENTIFIED BY oracleD、UPDATE USER test IDENTIFIED BY oracle
问题
在Oracle中引入的（）语句通常被称作“更新插入”，因为使用该语句可以在同一个步骤中更新（update）并插入（insert）数据行，对于抽取、转换和载入类型的应用软件可以节省大量宝贵的时间。A、子查询B、合并查询C、外连接查询D、内连接查询
问题
Two data files have been deleted at the operating system level by accident. Your database is running in ARCHIVELOG mode and online backups are taken nightly. One of the data files that has been deleted belongs to the USERS tablespace on the other belongs to the SYSTEM tablespace. How can you recover from this situation？（）A、Shut down the database, restore the two data files and then start up the database. B、Take the system and users tablespace offline, restore the two data files, recover the two datafiles, and then bring the SYSTEM and USERS tablespaces online. C、Shut down the database, restore the two data files, start up the database in MOUNT mode, recover the two data files, and then alter the database open. D、Take the SYSTEM and USERS tablespaces offline, recover the two datafiles and then bring the SYSTEM and USERS tablespaces online.
问题
Which two statements describe good practices for an application developer to reduce lockingconflicts in Oracle database（）A、Avoid coding unnecessary long-running transactions.B、Allow the database to handle locks in default locking mode.C、Always explicitly code the locks as per the requirement of the application.D、Allow escalation of row locks to block locks if too many row locks cause problem.
问题
You want to use the SQL Tuning Advisor to generate recommendations for badly written SQL statements in your development environment. Which three sources can you select for the advisor to analyze？ （）A、Top SQLB、snapshotsC、SQL Tuning setsD、index access pathE、optimizer statisticsF、materialized view logs
问题
Your ARCHIVELOG-mode database has lost three datafiles and shut down. One is assigned to the SYSTEM tablespace and two are assigned to the USERS tablespace. You can choose from the following steps to recover your database： a. Restore the three database datafiles that were lost. b. Issue the Startup Mount command to mount the database. c. Issue the alter database open command. d. Issue the alter database open resetlogs command. e. Recover the database using the recover database command. f. Recover the datafiles with the recover datafile command. g. Take the datafiles offline. Which is the correct order of these steps in this case？（）A、a， b， e， cB、b， e， dC、a， b， d， cD、b， g， c， fE、a， b， d， f
问题
What criterion does Oracle9i use to determine whether a database file is an Oracle Managed File？（） A、The filename format. B、Information stored inside a data dictionary table. C、Information stored in the ALERT.LOG file for the corresponding instance. D、Information stored inside the corresponding initialization parameter file for the instance.
问题
You wish to enable an audit policy for all database users, except SYS, SYSTEM, and SCOTT.You issue the following statements: SQL AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYS;SQL AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYSTEM; SQL AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SCOTT; For which database users is the audit policy now active?（）A、All users except SYSB、All users except SCOTTC、All users except sys and SCOTTD、All users except sys, system, and SCOTT
问题
Which four statements are true？（）A、Has-a relationships should never be encapsulated.B、Has-a relationships should be implemented using inheritance.C、Has-a relationships can be implemented using instance variables.D、Is-a relationships can be implemented using the extends keyword.E、Is-a relationships can be implemented using the implements keyword.F、An array or a collection can be used to implement a one-to-many has-a relationship.
问题
You issue the following command on the RMAN prompt. REPORT NEED BACKUP DAYS 5; Which statement is true about executing this command?（）A、It will display a list of files that need incremental backupB、It will display a list of files that need backup after five daysC、It will display a list of files that were backed up in the last five daysD、It will display a list of files that have not been backed up in the last five daysE、It will apply the current retention policy to determine the files that need to be backed up
问题
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.