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单选题
The user is trying to execute a SELECT statement. Which of the following background processes will obtain data from a disk for the user?（）
A
DISPATCHER
B
USER
C
SERVER
D
LGWR
E
DBW0
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单选题The user Alice wants to grant all users query privileges on her DEPT table. Which SQL statement accomplishes this? （）A
GRANT select ON dept TO ALL_ USER;B
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GRANT select ON dept TO PUBLIC;
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GRANT SELECT ON FLASHBACK_TRANSACTION_QUERY TO ARRENC
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GRANT FLASHBACK TO ARRENE
GRANT SELECT ANY VIEW TO ARREN
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单选题User A issues the command: LOCK TABLES pets READ; Which command can User B execute against the pets table?（）A
UPDATE pets…B
SELECT….FROM petsC
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ALTER TABLE pets…
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