The process of standardizing data units, formats, and structures across diverse data sources is known as ________.
- Data Cleansing
- Data Harmonization
- Data Integration
- Data Segmentation
Data Harmonization involves standardizing data units, formats, and structures across diverse data sources to ensure consistency and compatibility. It's crucial in creating a unified view of the organization's data.
In Dimensional Modeling, a ________ is a type of slowly changing dimension where all historical attributes are preserved.
- Type 1 Dimension
- Type 2 Dimension
- Type 3 Dimension
- Type 4 Dimension
In Dimensional Modeling, a Type 3 Dimension is a slowly changing dimension where only the most recent value is stored alongside historical values, preserving all historical attributes for analysis and reporting purposes.
Which of the following is NOT a component of a data governance framework?
- Data modeling
- Data quality management
- Data security
- Data stewardship
Data modeling is not typically considered a direct component of a data governance framework. While it plays a crucial role in database design and management, it is distinct from the governance processes focused on establishing policies, standards, and accountability for data management and usage.
Scenario: You are designing an ERD for a university database. Each student can enroll in multiple courses, and each course can have multiple students enrolled. What type of relationship would you represent between the "Student" and "Course" entities?
- Many-to-Many
- Many-to-One
- One-to-Many
- One-to-One
The relationship between "Student" and "Course" entities in this scenario is Many-to-Many, as each student can enroll in multiple courses, and each course can have multiple students enrolled, forming a many-to-many relationship.
________ is a technique used in ETL optimization to reduce the time taken to load data into the target system.
- Aggregation
- Data Masking
- Denormalization
- Incremental Load
Incremental load is a technique used in ETL optimization where only the changes or new data are loaded into the target system, reducing the time and resources required for data loading processes.
What are some common technologies used for stream processing in real-time data processing systems?
- Apache Kafka, Apache Flink, Apache Storm, Apache Samza
- Hadoop, MongoDB, Redis, PostgreSQL
- Python, Java, C++, Ruby
- TensorFlow, PyTorch, Keras, Scikit-learn
Common technologies for stream processing in real-time data processing systems include Apache Kafka, Apache Flink, Apache Storm, and Apache Samza. These technologies are specifically designed to handle high-throughput, low-latency data streams, offering features like scalability, fault tolerance, and exactly-once processing semantics. They enable real-time processing of data streams, facilitating applications such as real-time analytics, monitoring, and event-driven architectures.
What are some common tools or frameworks used for building batch processing pipelines?
- Apache Beam, Apache Samza, Storm
- Apache Kafka, RabbitMQ, Amazon Kinesis
- Apache Spark, Apache Hadoop, Apache Flink
- TensorFlow, PyTorch, scikit-learn
Common tools or frameworks for building batch processing pipelines include Apache Spark, Apache Hadoop, and Apache Flink. These frameworks offer distributed processing capabilities, fault tolerance, and scalability, making them suitable for handling large volumes of data in batch mode efficiently. They provide features such as parallel processing, fault recovery, and resource management to streamline batch data processing workflows.
What is the primary objective of real-time data processing?
- Data archival and storage
- Immediate data analysis and response
- Long-term trend analysis
- Scheduled data backups
The primary objective of real-time data processing is to enable immediate analysis and response to incoming data streams. Real-time processing systems are designed to handle data as it arrives, allowing organizations to make timely decisions, detect anomalies, and take appropriate actions without delay. This capability is crucial in various applications such as financial trading, monitoring systems, and online retail for providing instant insights and ensuring operational efficiency.
Which of the following is an example of a real-time data processing use case?
- Annual report generation
- Batch processing of historical data
- Data archival
- Fraud detection in financial transactions
Fraud detection in financial transactions is an example of a real-time data processing use case where incoming transactions are analyzed instantly to identify suspicious patterns or anomalies, enabling timely intervention to prevent potential fraud. Real-time processing is crucial in such scenarios to minimize financial losses and maintain trust in the system.
Scenario: You are tasked with designing a new database for an e-commerce platform. What type of data model would you start with to capture the high-level business concepts and requirements?
- Conceptual Data Model
- Entity-Relationship Diagram (ERD)
- Logical Data Model
- Physical Data Model
A Conceptual Data Model would be the most appropriate choice to capture high-level business concepts and requirements without concerning about implementation details. It focuses on entities, attributes, and relationships.