To minimize the impact on source systems, ________ can be used for data extraction.
- Change Data Capture (CDC)
- Data Masking
- Data Migration
- Data Profiling
To minimize the impact on source systems, Change Data Capture (CDC) can be used for data extraction. CDC identifies and captures only the changes made to the source data since the last extraction, reducing the load on source systems.
What is the primary purpose of defect reporting in ETL testing?
- Create test data for ETL
- Identify and document issues in the ETL process
- Monitor ETL performance
- Optimize ETL code
The primary purpose of defect reporting in ETL testing is to identify and document issues or anomalies in the ETL process. This involves detailing the nature of the problem, steps to reproduce it, and its impact on data integrity and processing.
Advanced ETL Security Testing might employ ________ to simulate attacks on the system.
- Data Profiling
- Load Testing
- Penetration Testing
- Performance Testing
Penetration Testing is a crucial technique in Advanced ETL Security Testing. It involves simulating attacks on the system to identify vulnerabilities and strengthen security measures.
________ is a key practice in ETL testing to identify early defects in data transformation.
- Incremental Testing
- Regression Testing
- Sanity Testing
- Smoke Testing
Sanity testing in ETL is a practice that checks whether the basic functionalities of data transformation are working correctly. It helps identify early defects and ensures the stability of the ETL process.
How does Snowflake Schema in a Data Warehouse differ from Star Schema?
- It has a central fact table connected to dimension tables.
- It involves denormalized dimension tables for simplicity.
- It is not suitable for complex relationships.
- It normalizes dimension tables to eliminate redundancy.
The Snowflake Schema differs from the Star Schema as it involves normalizing dimension tables to eliminate redundancy. This results in a more normalized structure but can impact query performance.
How often should regression testing be performed in a typical ETL process?
- After every change in the ETL code
- At the end of the ETL process
- Once at the beginning of the project
- Only during the production phase
Regression testing in a typical ETL process should be performed after every change in the ETL code. This frequent testing helps catch and address potential issues early in the development cycle, ensuring system stability.
What is a key consideration when managing test data in compliance with data privacy regulations?
- Data anonymization
- Data duplication
- Data normalization
- Data synchronization
A key consideration when managing test data in compliance with data privacy regulations is data anonymization. Anonymizing data involves removing personally identifiable information (PII) or replacing it with fictitious data to protect individuals' privacy and ensure regulatory compliance.
In ETL testing, version control systems like ________ are used to track changes in test scripts.
- Git
- Mercurial
- SVN
- TFS
In ETL testing, version control systems like Git are used to track changes in test scripts. This allows teams to manage and coordinate changes efficiently, ensuring version history and traceability.
For large datasets, ETL processes might use ________ to manage and process data efficiently.
- Data Indexing
- Data Lakes
- Data Warehouses
- Parallel Processing
For large datasets, ETL processes might use Parallel Processing to manage and process data efficiently. Parallel processing involves dividing data into smaller chunks and processing them simultaneously, improving performance for large-scale operations.
In a scenario where data inconsistency is a major issue, how can AI/ML assist in enhancing the ETL testing process?
- Code Reviews, Source System Redesign, Data Partitioning, Incremental Loading
- Pattern Recognition, Anomaly Detection, Data Cleansing, Manual Validation
- Predictive Analytics, Automated Data Profiling, Enhanced Data Governance, Manual Data Comparison
- Traditional Testing Methods, Increased Documentation, Delayed Feedback, Minimal Automation
AI/ML can assist in handling data inconsistency through pattern recognition, anomaly detection, and data cleansing. This enhances ETL testing by automating processes that traditionally required manual effort, leading to more accurate and efficient results.