In a data lake, ________ plays a vital role in managing and organizing different types of data.
- Compression
- Encryption
- Indexing
- Metadata
In a data lake, metadata plays a vital role in managing and organizing different types of data. It provides information about the data, helping users understand its structure, format, and context.
Which metric is commonly used to assess the accuracy of data in ETL testing?
- Data Accuracy
- Data Completeness
- Data Consistency
- Data Integrity
Data Accuracy is commonly used to assess the correctness and precision of data in ETL testing. It measures how closely the extracted, transformed, and loaded data aligns with the expected results or business requirements. Evaluating data accuracy helps ensure that the ETL process maintains the integrity and reliability of the data.
How does the concept of data warehousing relate to BI tool efficiency?
- Data Compression
- Data Consolidation
- Data Duplication
- Data Fragmentation
Data warehousing is about consolidating data from various sources into a centralized repository. Efficient data warehousing reduces data fragmentation, making it easier for BI tools to retrieve and analyze information. This consolidation enhances BI tool efficiency by providing a unified data source.
To protect sensitive data, ETL processes often implement ________ to restrict data access.
- Compression
- Encryption
- Hashing
- Masking
ETL processes commonly implement data masking to restrict access to sensitive information. Data masking involves replacing original data with fictional or pseudonymous data, safeguarding sensitive content during the process.
Test requirement analysis in ETL testing must consider the ________ of data sources.
- Complexity
- Integrity
- Structure
- Volume
In ETL testing, understanding the volume of data sources is crucial during test requirement analysis. This involves assessing the size and quantity of data to ensure the system can handle it effectively.
What is the primary focus of ETL Security Testing?
- Data Accuracy
- Data Availability
- Data Compression
- Data Confidentiality
The primary focus of ETL Security Testing is ensuring Data Confidentiality. It involves validating that sensitive data is protected from unauthorized access and ensuring that only authorized users can access and manipulate the data.
A company notices a decline in the data quality score after modifying their ETL process. What aspects should they investigate?
- Data Transformation Logic, Data Loading Speed, Source Data Quality, Target Data Structure
- ETL Tools Compatibility, Source System Scalability, Target System Connectivity, Data Extraction Methods
- Hardware Specifications, Network Latency, Data Encryption Methods, Data Governance Policies
- Metadata Management, Data Profiling Techniques, Data Archiving Strategies, Data Validation Techniques
When data quality declines after modifying the ETL process, investigation should focus on aspects like the correctness of data transformation logic, speed of data loading, source data quality, and compatibility with the target data structure. This helps identify and rectify issues affecting data quality.
________ is a key metric that measures the percentage of test cases executed in the ETL process.
- Completion Ratio
- Execution Rate
- Test Coverage
- Validation Percentage
Test Coverage is a key metric in ETL testing that measures the percentage of test cases executed in the ETL process. It provides insights into the extent of testing coverage.
During a test environment setup for an ETL process, what strategies should be employed to handle large volumes of data efficiently?
- Distributed processing, Change data capture, Data obfuscation, Data deduplication
- Parallel processing, Incremental loading, Compression techniques, Data partitioning
- Sequential loading, Real-time processing, Data archiving, Data denormalization
- Single-threaded processing, Full refresh, Data duplication, Data normalization
Handling large data volumes in an ETL environment requires strategies like parallel processing, incremental loading, compression techniques, and data partitioning. These approaches optimize data processing and enhance performance.
In test case design, what is the difference between black-box and white-box testing techniques?
- Black-box testing and white-box testing are the same.
- Black-box testing focuses on testing the functionality of a system without knowledge of its internal structure, while white-box testing involves testing the internal logic and structure of the system.
- Black-box testing focuses on testing the user interface only, while white-box testing focuses on testing the backend processes only.
- Black-box testing involves testing the internal logic and structure of the system, while white-box testing focuses on testing the functionality of a system without knowledge of its internal structure.
Black-box testing and white-box testing are two fundamental approaches to software testing. Black-box testing verifies the functionality of the system from the end user's perspective, while white-box testing examines the internal structure, logic, and code of the system.