问题:
A . Running a query 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 ALTER INDEX ...REBUILD fails with an error "ORA-01578: ORACLE data block corrupted (file # 14, block # 50).
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