In FusionInsight HD, which parts of a complete Streaming CQL application include at least? (multiple choice)

Question

Options

• ACreate an input stream
• BCreate an output stream
• CBusiness operation statements (such as SELECT, INSERT, JION, etc.)
• DApplication submission statement

• A
  100% (35)

Explanation

All four options (A, B, C, D) are correct because a complete Streaming CQL application in FusionInsight HD is a full data pipeline that requires every listed component to function end-to-end. The input stream (A) defines the data source, feeding real-time data into the application; without it, there is nothing to process. The output stream (B) defines where the processed results are written or emitted; omitting it means results have nowhere to go. Business operation statements (C) - such as SELECT, INSERT, and JOIN - contain the actual processing logic that transforms, filters, or aggregates the incoming data; they are the core of the application's purpose. Finally, the application submission statement (D) is required to actually deploy and execute the job on the cluster; a script without it is never run.

Since all four choices are correct, there are no wrong distractors in this question - the key exam trap is assuming that submission (D) is optional or handled externally, when in fact it is considered a required part of the complete application definition in FusionInsight HD's CQL model.

Memory tip: Think of the acronym I-O-B-S - Input, Output, Business logic, Submit. A streaming app with any of these missing is like a pipeline with a broken stage - data either can't enter, can't be processed, can't exit, or can't start.

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