052(二十）

96、

96.Identify the two situations in which you use the alert log file in your database to check the details. (Choose two.) 
A. Running a query on a table returns "ORA-600: Internal Error." 
B. Inserting a value in a table returns "ORA-01722: invalid number." 
C. Creating a table returns "ORA-00955: name is already used by an existing object." 
D. Inserting a value in a table returns "ORA-00001: unique constraint (SYS.PK_TECHP) violated." 
E. Inserting a row in a table returns "ORA-00060: deadlock detected while waiting for resource." 

Answer: AE

alert日志文件记录：
1：所有的内部错误（ORA-600）信息，块损坏错误（ORA-1578）信息，以及死锁错误（ORA-60）信息等。
2：管理操作，例如CREATE、ALTER、DROP语句等，以及数据库启动、关闭以及日志归档的一些信息。
数据文件、联机重做日志文件、表空间操作
3：与共享服务器或调度进程相关功能的消息和错误信息。
4：物化视图的自动刷新过程中出现的错误。
5：动态参数的修改信息。

97、

97.Which three statements are correct about temporary tables? (Choose three.) 
A. Indexes and views can be created on temporary tables. 
B. Both the data and the structure of temporary tables can be exported. 
C. Temporary tables are always created in a user's temporary tablespace. 
D. The data inserted into a temporary table in a session is available to other sessions. 
E. Data manipulation language (DML) locks are never acquired on the data of temporary tables.

Answer: ACE

临时表

详见：052(三）第12题

98、

98.You are working on a database that must be functioning 24 hours a day, 7 days a week. The database is configured in ARCHIVELOG mode.
Which two options do you have for performing user-managed backups? (Choose two.)
A. You can perform consistent backups only. 
B. You can perform a complete database backup without shutting down the database instance. 
C. You can back up data files only when all data files have the same SCN recorded in the control file. 
D. You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGIN BACKUP or ALTER DATABASE BEGIN BACKUP commands. 

Answer: BD

热备份支持 24*7 不间断运行
需要alter tablespace users begin backup;

99、

99.You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows: 
Warning (%): 90 
Critical (%): 95 
Which background process is responsible for issuing alerts when the threshold is crossed? 
A. System monitor (SMON) 
B. Process monitor (PMON) 
C. Memory manager process (MMAN) 
D. Manageability Monitor process (MMON) 

Answer: D

MMON 管理监控进程

100、

100.User SCOTT executes the following command on the EMP table but has not issued COMMIT, 
ROLLBACK, or any data definition language (DDL) command: 
SQL> SELECT ename FROM emp 2 
WHERE job='CLERK' FOR UPDATE OF empno; 
SCOTT has opened another session to work with the database instance. 
Which three operations would wait when issued in SCOTT's second session? (Choose three.) 
A. LOCK TABLE emp IN SHARE MODE; 
B. LOCK TABLE emp IN EXCLUSIVE MODE; 
C. UPDATE emp SET sal=sal*1.2 WHERE job='MANAGER' 
D. INSERT INTO emp(empno,ename) VALUES (1289,'Harry'); 
E. SELECT ename FROM emp WHERE job='CLERK' FOR UPDATE OF empno; 

Answer: ABE 

EXCLUSIVE MODE

SHARE MODE