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21、Which two are true about roles? A) A role can be password-protected. B) A role can be granted to another role. C) Only one default role can be gran 阅读全文
posted @ 2018-07-25 11:35
cnblogs_5359
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20、 Which is true about the SYSTEM and SYSAUX tablespaces? A) The SYSAUX tablespace can be made read-only but the SYSTEM tablespace cannot. B) Both ta 阅读全文
posted @ 2018-07-25 11:19
cnblogs_5359
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