Real-time Processing — Data Engineer (Associate)

The official ALIBABA documentation our Real-time Processing practice questions are cited to. Review the primary sources, then practise.

Official references for this objective

Alibabacloud — Compare Flink SQL and DataStream API: Comprehensive Guide for New Developers - Alibaba Cloud Community

Flink automatically retains state data for 30 MINUTE + 15 MINUTE = 45 minutes. Outdated state beyond this interval is automatically cleaned.
Alibabacloud — Apache Flink Fundamentals: State Management and Fault Tolerance - Alibaba Cloud Community

The two /api/a Nginx logs have the same input but different outputs
Alibabacloud — How to use the streaming data tunnel service - MaxCompute - Alibaba Cloud Documentation Center

Concurrency High concurrency supported; no partition locking contention Concurrent writes can cause partition locking conflicts Write throughput Optimized for high QPS; prevents small-file fragmentation
Alibabacloud — Understanding Batch Processing vs Stream Processing: Key Differences and Applications - Alibaba Cloud Community

Stream processing has almost no delay, offering real-time results.
Alibabacloud — How to stream data on MaxCompute - MaxCompute - Alibaba Cloud Documentation Center

Data is available for processing within seconds and is protected even if the source server fails.
Alibabacloud — What is Apache Flink ？ - Alibaba Cloud Community

Spark Streaming provides a micro-batch processing model, which is not as low-latency as Flink's true streaming approach.