Answer: Increase the number of SUs., Parallelize the query.

## Analysis of Azure Stream Analytics Job Optimization Based on the provided metrics and the context of optimizing an Azure Stream Analytics job with a late arrival tolerance of five seconds, the optimal actions are: ### ✅ **Correct Answers: A and B** **A: Increase the number of SUs (Streaming Units)** - **Rationale**: Increasing SUs provides more processing capacity and resources to handle the data stream. This is particularly beneficial when the job is experiencing performance bottlenecks or when throughput needs to be improved. More SUs allow for better handling of peak loads and can reduce processing latency. **B: Parallelize the query** - **Rationale**: Query parallelization involves optimizing the query structure to leverage multiple processing nodes simultaneously. This can significantly improve processing efficiency by distributing the workload across available resources. Techniques include partitioning data appropriately and using parallelizable query constructs to maximize throughput. ### ❌ **Incorrect Answers: C and D** **C: Resolve errors in output processing** - **Not applicable**: There is no indication in the metrics or scenario description that output processing errors exist. The optimization focus should be on performance improvement rather than error resolution when no errors are reported. **D: Resolve errors in input processing** - **Not applicable**: Similarly, there is no evidence of input processing errors in the provided information. The late arrival tolerance setting is functioning as expected (five seconds), and no input errors are mentioned that would require resolution. ### **Optimization Strategy** The combination of increasing SUs and parallelizing the query addresses performance optimization from both infrastructure (resource allocation) and application (query design) perspectives. This dual approach ensures maximum processing efficiency without addressing non-existent error conditions.

Author: LeetQuiz Editorial Team