分析题
Suppose Program A, (a client program, because it makes a request) asks Program B, a server program, to update some fields in a database. Program B is on another computer. Program A expects Program B to report that either: (1) the operation was successfully completed, or (2) the operation was unsuccessful (for example, because the requested record was locked.) However, time passes and A hears nothing.

First question: What should A do? 
Second question: What are the possibilities? 
How to confirm A works right？

可以帮我解决上边的问题吗，谢谢

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1、A Should supply some information about those fields in this database ,and connected to another computer ,then post those information to B
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３、A should reselect records in database,and read the special fieldsets in order to check that