OCP 052考试详解：1Z0-V8.02-第58题
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58. View the Exhibit and examine the parameters.
User A executes the following command to update the TRANS table:
SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code='C005';
Before user A issues a COMMIT or ROLLBACK command, user B executes the following command on
the TRANS table:
SQL> ALTER TABLE trans MODIFY (tr_type VARCHAR2(3));
What would happen in this scenario?
A.The ALTER TABLE command modifies the column successfully.
B.The DDL operation gets higher priority and transaction for user A is rolled back.
C.The ALTER TABLE command waits indefinitely until user A ends the transaction.
D.The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy.
Answer: D
