フリー問題

問題文

An administrator has been asked to run the database with the Oracle processes mapped onto threads rather than onto host processes. The accounts of the site reach the database by letting the host account stand in for the credential. Which statement is correct?

選択肢

1. The mapping onto threads leaves the host account unable to stand in for the credential, so the accounts that reach the database along that route need a credential of their own before the mapping is turned on.
2. The mapping onto threads has no bearing upon the way a credential is checked, so the host account goes on standing in for it and nothing has to be prepared before the mapping is turned on.
3. The mapping onto threads moves the check of the credential from the instance to the listener, so the host account stands in for it only where the listener and the database happen to share a host.
4. The mapping onto threads leaves the host account able to stand in for the credential for the accounts that hold administrative rights, so only the ordinary accounts need a credential of their own before the mapping is turned on.