The _______ design pattern is used to define an interface for creating an object, but let subclasses alter the type of objects that will be created.
- Abstract Factory
- Builder
- Factory
- Prototype
The Factory design pattern is used to define an interface for creating an object, but let subclasses alter the type of objects that will be created. It provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.
How does the concept of data federation impact BI tool integration?
- Enhances Data Security
- Improves Data Governance
- Increases Integration Complexity
- Simplifies Data Access
Data Federation simplifies BI tool integration by providing a unified view of data from different sources. It eases data access and analysis, reducing the complexity associated with integrating diverse datasets.
For assessing the throughput of data pipelines, ________ is a crucial metric analyzed by performance testing tools.
- Bandwidth
- Latency
- Scalability
- Throughput
Throughput is a crucial metric in performance testing of data pipelines. It measures the rate at which data can be processed and transmitted, providing insights into the system's efficiency and capacity.
What does API stand for in RESTful APIs?
- Advanced Programming Interface
- Application Programming Interface
- Application Protocol Interface
- Automated Programming Interface
API stands for Application Programming Interface. It is a set of rules and tools that allows different software applications to communicate with each other. In the context of RESTful APIs, it facilitates communication between clients and servers.
Which factors should be considered during query optimization to improve performance?
- Data encryption and security measures
- Indexing, table structure, and join conditions
- Query length, formatting, and indentation
- Server capacity and network speed
During query optimization, factors like indexing, table structure, and join conditions play a crucial role in improving performance. Optimizing these aspects enhances the efficiency of data retrieval and processing.
________ constraints ensure that all values in a column are different.
- Check
- Foreign Key
- Primary Key
- Unique
Unique constraints in SQL ensure that all values in a column are different. This is commonly used to enforce uniqueness in a specific column, such as a unique username in a user table.
In data transformation, what is a lookup transformation used for?
- Aggregating data values
- Applying calculations to data
- Matching and retrieving related data from another table
- Sorting data based on a specified criterion
A lookup transformation in data transformation is used for matching and retrieving related data from another table. It helps enrich the data by incorporating additional information based on matching keys.
What is a data anomaly in the context of ETL testing?
- Data Abnormality
- Data Discrepancy
- Data Inconsistency
- Data Irregularity
In ETL testing, a data anomaly refers to a Data Discrepancy, which indicates differences or irregularities in the data between the source and target systems. Identifying and resolving such anomalies is crucial for ensuring data accuracy and integrity.
Implementing ________ in the test environment allows for dynamic scaling and testing of ETL processes.
- Auto Scaling
- Data Encryption
- Load Balancing
- Version Control
Implementing Auto Scaling in the test environment allows for dynamic scaling and testing of ETL processes. This ensures optimal resource utilization during varying workloads.
________ strategy in data loading is beneficial for reducing load times and system impact.
- Indexing
- Normalization
- Parallel
- Partitioning
Parallel loading strategy in data loading is beneficial for reducing load times and system impact. It involves dividing the data into smaller subsets and loading them concurrently, improving overall efficiency.