3.A database is open read write and the instance has multiple sessions some of which have active transactions.

　　You execute this command:

　　SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;

　　Which three are true about the active transactions?

　　A) They may continue to issue dml statements.

　　B) They may issue commit or rollback statements.

　　C) They may continue to issue queries.

　　D) They are suspended and unable to issue any statements.

　　E) They are terminated immediately.

　　F) They are rolled back automatically.

　　Answer：ABC

　　(解析：把数据库变成限制会话状态，只会对以后的登录有影响，对已经登录的会话没有影响。)

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