[单选]
View the Exhibit and examine the parameters. User A executes the following command to update the TRANStable：
SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT orROLLBACK 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

A Dell customer decided to use IBM Director and xSeries to manage their servers. They purchased 10 IBM x336 servers and they already have 75 various Dell servers. Which TWO steps need to be verified to be able to manage the mixed environment with IBM Director？（） Verify that the Dell systems have TCP/IP enabled。 Verify that the systems are running the IBM Director Agent。 Verify that the managed systems are SMBIOS 2.1 and WfM 2.0 compliant。 Verify that the Dell systems have at least a 1GB of memory installed。 Install an SNMP agent on the Dell systems as IBM Director cannot manage Industry Standard non-IBM server。变压器空载电流小的原因是（）。变压器铁心的电阻很大。变压器的励磁阻抗很大。一次绕组的漏抗很大。一次绕组匝数多，电阻很大。简述污泥膨胀的定义及其最主要的解决方法。对开四通焊缝的焊接顺序（）可以同时焊接。先焊环缝再焊横缝。先焊横缝再焊环缝。以上都对。修剪高度：

View the Exhibit and examine the parameters. User A executes the following command to update the TRANStable：
SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT orROLLBACK 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（）

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