What is the impact of processing latency on the design of streaming processing pipelines?
- Higher processing latency may result in delayed insights and reduced responsiveness
- Lower processing latency enables faster data ingestion but increases resource consumption
- Processing latency has minimal impact on pipeline design as long as data consistency is maintained
- Processing latency primarily affects throughput and has no impact on pipeline design
Processing latency refers to the time taken to process data from ingestion to producing an output. Higher processing latency can lead to delayed insights and reduced responsiveness, impacting the overall user experience and decision-making process. In the design of streaming processing pipelines, minimizing processing latency is crucial for achieving real-time or near-real-time data processing, ensuring timely insights and actions based on incoming data streams.
In HDFS, data is stored in ________ to ensure fault tolerance and high availability.
- Blocks
- Buckets
- Files
- Partitions
In HDFS (Hadoop Distributed File System), data is stored in blocks to ensure fault tolerance and high availability. This replication of data across multiple nodes enhances reliability in case of node failure.
What does ETL stand for in the context of data engineering?
- Extract, Transform, Load
- Extract, Translate, Load
- Extract, Transmit, Log
- Extraction, Transformation, Loading
ETL stands for Extraction, Transformation, Loading. This process involves extracting data from various sources, transforming it into a suitable format, and loading it into a target destination for analysis.
In data transformation, what is the significance of schema evolution?
- Accommodating changes in data structure over time
- Ensuring data consistency and integrity
- Implementing data compression algorithms
- Optimizing data storage and retrieval
Schema evolution in data transformation refers to the ability to accommodate changes in the structure of data over time without disrupting the data processing pipeline. It ensures flexibility and adaptability.
Which data model would you use to represent the specific database tables, columns, data types, and constraints?
- Conceptual Data Model
- Hierarchical Data Model
- Logical Data Model
- Physical Data Model
The physical data model represents the specific database structures, including tables, columns, data types, and constraints. It is concerned with the implementation details of the database design, optimizing for storage and performance.
Scenario: A retail company wants to improve its decision-making process by enhancing data quality. How would you measure data quality metrics to ensure reliable business insights?
- Accessibility, Flexibility, Scalability, Usability
- Completeness, Relevance, Precision, Reliability
- Integrity, Transparency, Efficiency, Usability
- Validity, Accuracy, Consistency, Timeliness
For a retail company aiming to improve decision-making through enhanced data quality, measuring metrics such as Completeness (all relevant data captured), Relevance (data aligned with business objectives), Precision (data granularity and detail), and Reliability (consistency and trustworthiness) are crucial. These metrics ensure that the data used for business insights is accurate, comprehensive, and directly applicable to decision-making processes. By prioritizing these metrics, the retail company can optimize operations, personalize customer experiences, and drive profitability.
Which of the following is NOT a commonly used data extraction technique?
- Change Data Capture (CDC)
- ETL (Extract, Transform, Load)
- Push Data Pipeline
- Web Scraping
Push Data Pipeline is not a commonly used data extraction technique. ETL, CDC, and Web Scraping are more commonly employed methods for extracting data from various sources.
In normalization, what is a functional dependency?
- A constraint on the database schema
- A constraint on the primary key
- A relationship between two attributes
- An attribute determining another attribute's value
In normalization, a functional dependency occurs when one attribute in a relation uniquely determines another attribute's value. This forms the basis for eliminating redundancy and ensuring data integrity.
In a physical data model, what aspects of the database system are typically considered, which are not part of the conceptual or logical models?
- Business rules and requirements
- Data integrity constraints
- Entity relationships and attributes
- Storage parameters and optimization strategies
A physical data model includes aspects such as storage parameters and optimization strategies, which are not present in conceptual or logical models. These aspects are essential for database implementation and performance tuning.
A data governance framework helps establish ________ and accountability for data-related activities.
- Confidentiality
- Integrity
- Ownership
- Transparency
A data governance framework establishes ownership and accountability for data-related activities within an organization. It defines roles and responsibilities for managing and protecting data, ensuring that individuals or teams are accountable for data quality, security, and compliance. Ownership ensures that there are clear stakeholders responsible for making decisions about data governance policies and practices.