mulesoft Module 9 quiz 解析

  • 1. A Scatter-Gather processes three separate HTTP requests. Each request returns a Mule event with a JSON payload.
  • 2. What module and operation will throw an error if a Mule event's payload is not a number?
  • 3. An event contains a payload that is an Array of Objects. How is the event routed in a Scatter-Gather?
  • 4. Refer to the exhibits. What happens to this flow when the Validation module's Is not null operation throws an error![在这里插入图片描述](https://img-blog.csdnimg.cn/76f112732ba343daa3a84e9cebeddea0.png)![在这里插入图片描述](https://img-blog.csdnimg.cn/cdc8e24f623c4fa58aed3ae8f4e4d7f5.png)
  • 5. How are multiple conditions used in a Choice router to route events?

1. A Scatter-Gather processes three separate HTTP requests. Each request returns a Mule event with a JSON payload.

What is the final output of the Scatter-Gather?

A An Object containing all three Mule event Objects
B An Array of the three JSON payload Objects
C The last JSON payload Object
D An Object containing all three JSON payload Objects
E An Array of three Mule event Objects
F The last Mule event Object

答案：A，通过后面的第三题可以得知，Scatter-Gather是穿行执行的，如果汇总到一个array里面，那将不能区分谁是谁的返回信息，所以应该是类似于map的Object，题目也告诉返回的是Mule event，a Mule event with a JSON payload也是Mule event，大白马也是马，一个道理

2. What module and operation will throw an error if a Mule event’s payload is not a number?

A Validation module’s Is number operation
B Validation module’s Is not number operation
C Filter module’s Is not number operation
D Filter module’s Is number operation

答案：A，需要审一下题，需要在不是number的时候报错，那就只能是number的validation了

3. An event contains a payload that is an Array of Objects. How is the event routed in a Scatter-Gather?

A The ENTIRE event is sent to each route and processed in PARALLEL
B The event is SPLIT and different SMALLER events are routed and processed in PARALLEL
C The event is SPLIT and different SMALLER events are routed and processed SEQUENTIALLY
D The ENTIRE event is sent to each route and precessed SEQUENTIALLY

答案：A，主要考察并行还是串行，Scatter-Gather是并行

4. Refer to the exhibits. What happens to this flow when the Validation module’s Is not null operation throws an error

A The flow stops processing its Mule event and returns an error message to the HTTP Listener operation
B The flow continues processing its Mule event and appends the error message to the end of the payload
C The flow silently stops processing its Mule event
D The flow logs the error message in console and continues processing its Mule event

答案：A，报错了，肯定就不会继续执行了

5. How are multiple conditions used in a Choice router to route events?

A To find the FIRST true condition, then distribute the event to the ONE matched route
B To filter and aggregate the responses after copying the event to EVERY route
C To find the FIRST true condition, then route the same event to the matched route and
ALL FOLLOWING routes
D To route the same event to the matched route of EVERY true condition

答案：A，类似于is else

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