Which two statements are true regarding the database in ARCHIVELOG mode？（） You have to shut down the database to perform the backups.。 Archiving information is written to the data files and redo log files.。 You can perform complete database backups without closing the database.。 Online redo log files have to be multiplexed before putting the database in ARCHIVELOG mode.。 All the previous database backups become invalid after you configure the database to ARCHIVELOG mode.。
影响消费者行为的主要因素
Which statement is true regarding virtual private catalogs? （） A virtual private catalog owner can create a local stored script, and have read/write access to a global stored script. 。 The virtual private catalog owner cannot create and modify the stored scripts. 。 The set of views and synonyms that make up the virtual private catalog is stored in the schema of the RMAN recovery catalog owner. 。 To perform most of the RMAN operations, the virtual catalog owner must have the SYSDBA or SYSOPER privilege on the target database.&e。
You are part of the DBA team working for a multinational bank. The team is responsible for performing administrative tasks on the database server located at the home office. The database server at the home office has a production database and a test database named TESTDB. The test database is primarily used for testing database commands and configuration settings befor implementing these settings on the production database. The test database is also used for the development of database applications. You have been asked by the senior DBA to grant the SYSDBA privilege to a new team member， John， so that he can perform some administrative tasks， such as shutdown and startup operations， on TESTDB. You use the password file to configure remote authentication on the TESTDB database. You execute the following statement to grant the SYSDBA privilege to John： SQL>GRANT SYSDBA TO john； However， you receive the following error： ORA-01996： GRANT failed： password file ’c：\oracle\ora9i\dbs\testdb.pwd’ is full Which action should you take to add the user john to the password file without removing any of the existing users？（） Create another password file and then re-execute the GRANT statement.。 Re-create the password file， specifying a larger number of allowed entries， and then re-execute the GRANT statement.。 Change the value of the REMOTE_LOGIN_PASSWORDFILE initialization parameter in theinitialization parameter file to NONE and then re-execute the GRANT statement.。 Change the value of the REMOTE_LOGIN_PASSWORDFILE initialization parameter in the initialization parameter file to SHARED and then re-execute the GRANT statement.。
属于非电量的继电器是（）。 功率方向继电器。 瓦斯继电器。 阻抗继电器。
有关幼儿园的游戏常规的描述，正确的有（）
