java高并发应用程序？

Question

我在一次采访中被问到这个问题

Suppose there is a requirement of highly concurrent application e.g. Email application like Gmail where in say there 100K users accessing the application at the same time.

You are allowed to ask only 3 questions to client which 3 questions will you ask?

Client in this case is company who want the application to get developed. e.g.Google [Disclaimer: Name is just to give idea. I know what you must be thinking :) ]

我真的很困惑，有n个问题可以从技术、硬件配置等开始。有人能告诉我，在上述情况下，哪一个问题最适合

Answer 1

1. 预算
2. 期望的交货日期
3. 你有笔签名吗，还是需要一支

Answer 2

1. SLA（预期正常运行时间、响应时间、使用模式等）

2. 可以在维护（服务器/云、支持）上花费多少钱

3. 预期增长