You are managing an Oracle Database 11g database. You want to take a backup on tape drives of the USERS tablespace that has a single data file of 900 MB. You have tape drives of 300 MB each. To accomplish the backup， you issued the following RMAN command： RMAN>BACKUP SECTION SIZE 300M TABLESPACE users； What configuration should be effected to accomplish faster and optimized backups by using the above command？（） The SBT channel must be configured， with the default parallelism setting for the SBT device set to 1。 The COMPATIBLE initialization parameter for the database instance must be set to at least 10.0。 The SBT channel must be configured， with the parallelism setting for the SBT device set to 3。 The SBT channel must be configured， with the MAXPIECESIZE set to 300 MB。
与数学表达式对应的Object Pascal表达式是（）
下列关于家庭暴力的处置说法不正确的是（）。 法律援助机构应当依法为家庭暴力受害人提供法律援助。 人民法院不应当对家庭暴力受害人免收诉讼费。 设区的市级人民政府可以单独设立临时庇护场所，为家庭暴力受害人提供临时生活帮助。 人民法院应当依法对家庭暴力受害人缓收诉讼费。
Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object？（） When using versions of Java technology earlier than 5.0.。 When sharing a StringBuffer among multiple threads.。 When using the java.io class StringBufferInputStream.。 When you plan to reuse the StringBuffer to build more than one string.。
Given： What is the result？ （） A new Item object is created with the preferred value in the id attribute.。 The attribute id in the Item object is modified to the new value.。 Compilation fails.。 An exception is thrown at runtime.。 The attribute id in the Item object remains unchanged.。
Which statement is true about a whole consistent database backup on a database running in ARCHIVELOG mode（）
