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Big Data and Analytics Services Flashcards

7 cards from real ACA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which Alibaba Cloud service is used to collect, subscribe to, and distribute real-time message streams, similar to Apache Kafka?

    Answer: DataHub

    DataHub is Alibaba Cloud's real-time data ingestion and distribution service that acts as a pub/sub message bus for streaming data, similar to Apache Kafka.

  2. What billing model does MaxCompute primarily offer for query costs?

    Answer: Pay-as-you-go based on data scanned (CU consumption) or subscription reserved CUs

    MaxCompute offers pay-as-you-go billing based on computing units (CUs) consumed per task, as well as subscription packages with reserved CUs for predictable workloads.

  3. Which component in DataWorks is responsible for defining and triggering task execution on a schedule?

    Answer: Task Scheduler (Scheduling and Operations center)

    DataWorks' Scheduling and Operations Center handles defining cron-based schedules, task dependencies, and monitoring the execution of data pipeline tasks.

  4. Alibaba Cloud's AnalyticDB for PostgreSQL is best suited for which use case?

    Answer: Massively parallel processing (MPP) for large-scale analytical queries

    AnalyticDB for PostgreSQL uses a Massively Parallel Processing (MPP) architecture optimized for complex analytical queries over large datasets, making it ideal for data warehouse workloads.

  5. In a typical Alibaba Cloud big data pipeline, what role does Log Service (SLS) play?

    Answer: Centralized log collection, storage, querying, and real-time analysis of machine-generated data

    Log Service (SLS) is Alibaba Cloud's platform for collecting, storing, indexing, and analyzing log and metric data from applications, servers, and services in real time.

  6. What is the main advantage of using Hologres over MaxCompute for analytics workloads?

    Answer: Hologres provides sub-second interactive query latency, whereas MaxCompute is optimized for batch processing

    Hologres is purpose-built for real-time interactive analytics with sub-second query latency, while MaxCompute is optimized for large-scale batch data processing jobs.

  7. Which Alibaba Cloud service can be used to visually build data integration workflows that move data between different sources and targets without writing code?

    Answer: DataWorks Data Integration

    DataWorks Data Integration provides a visual drag-and-drop interface to configure data synchronization tasks between heterogeneous data sources and targets.