052考题

[奥西里斯]

26: Identify the two situations in which the alert log file isupdated with details. (Choose two.)
选项
A.Running aquery on a table returns"ORA-600: Internal Error ."
B.Inserting a value in a table returns"ORA-01722: invalid number ."
C.Creating a table returns"ORA-00955: name is already used by an existing object."
D.Inserting a value in a table returns "ORA-00001: unique constraint (SYS.PK_TECHP)
violated."
E.Rebuilding an index using AL TER INDEX ...REBUILD fails with an error "ORA-01578:
ORACLE datablock corrupted (file# 14, block# 50)."
Correct Answers: A E

为啥呢？求指导