Exam AZ-220 topic 3 question 45 discussion

Actual exam question from Microsoft's AZ-220

Question #: 45
Topic #: 3

You have an Azure Stream Analytics workspace that contains a Stream Analytics job.

You need to create a JavaScript user-defined aggregate (UDA) method that will recalculate the UDA state based on the previous state and the current event values. The UDA method must be called when an event leaves a SLIDINGWINDOW.

Which UDA method should you use?

A. deaccumulateState()
B. accumulate()
C. computeResult()
D. deaccumulate()

Show Suggested Answer

Suggested Answer: D 🗳️

by Tyrel at June 28, 2023, 11:38 a.m.

Comments

Submit Cancel

Tyrel

2 years ago

Selected Answer: D

Correct. Method - init() The init() method initializes state of the aggregate. This method is called when window starts. Method – accumulate() The accumulate() method calculates the UDA state based on the previous state and the current event values. This method is called when an event enters a time window (TUMBLINGWINDOW, HOPPINGWINDOW, SLIDINGWINDOW, or SESSIONWINDOW). Method – deaccumulate() The deaccumulate() method recalculates state based on the previous state and the current event values. This method is called when an event leaves a SLIDINGWINDOW or SESSIONWINDOW. Method – deaccumulateState() The deaccumulateState() method recalculates state based on the previous state and the state of a hop. This method is called when a set of events leaves a HOPPINGWINDOW. Method – computeResult() The computeResult() method returns aggregate result based on the current state. This method is called at the end of a time window (TUMBLINGWINDOW, HOPPINGWINDOW, SLIDINGWINDOW, or SESSIONWINDOW).

upvoted 1 times

...