ETL Testing Multiple-Choice Questions (MCQs)

Q. What does ETL stand for in data processing?

Extract, Transform, Load
Evaluate, Test, Launch
Enable, Transfer, Log
Extend, Translate, Link
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Q. What is the primary purpose of ETL Testing?

To ensure the software UI is user-friendly
To verify data is accurately extracted, transformed, and loaded
To test the network connectivity
To check the database performance
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Q. Which phase of ETL testing involves comparing source data with target data?

Production Validation Testing
Source to Target Count Testing
Source to Target Data Testing
Metadata Testing
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Q. What is Data Profiling in ETL testing?

Creating user profiles for data access
Analyzing source data to understand its content, structure, and quality
Profiling the performance of ETL jobs
Creating profiles of data warehouse users
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Q. What does NULL value testing check for in ETL?

The presence of empty strings
The correct handling of NULL values during transformation
The speed of processing NULL values
The number of NULL values in the source data
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Q. What is the purpose of Incremental ETL Testing?

To test only new or updated data since the last ETL run
To gradually increase the volume of test data
To test the ETL process in small increments
To incrementally improve the ETL process
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Q. What is the main focus of Data Transformation Testing in ETL?

Testing the extraction process
Verifying that data is correctly transformed according to business rules
Checking the loading speed of data
Validating the data warehouse schema
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Q. What is the purpose of Metadata Testing in ETL?

Testing the accuracy of data descriptions
Verifying the transformation rules
Checking the data loading process
Validating the extraction queries
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Q. What is the primary goal of Production Validation Testing in ETL?

To test the ETL process in a development environment
To verify the ETL process works correctly in the production environment
To validate the production data before ETL
To test the production hardware
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Q. What does Source to Target Count Testing involve in ETL?

Comparing the number of records in source and target systems
Counting the number of ETL processes
Measuring the time taken for data transfer
Counting the number of errors during ETL
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Q. What is the purpose of Data Quality Testing in ETL?

To ensure data meets defined quality standards and business rules
To test the quality of ETL tools
To measure the speed of data processing
To validate the database schema
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Q. What is a primary key test in ETL testing?

Testing the speed of primary key lookups
Verifying the uniqueness of primary key values in the target system
Checking if all tables have primary keys
Testing the primary ETL process
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Q. What is the main purpose of Performance Testing in ETL?

To test the user interface performance
To measure and optimize the speed and efficiency of ETL processes
To check the performance of database queries
To test the network performance
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Q. What is Referential Integrity Testing in ETL?

Testing the integrity of ETL developers
Verifying that relationships between tables are maintained after ETL
Checking the integrity of source data
Testing the integrity of ETL tools
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Q. What is the purpose of Regression Testing in ETL?

To test new features of the ETL process
To ensure changes or updates haven't negatively impacted existing functionality
To test the backward movement of data
To analyze historical trends in data
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Q. What is the focus of Data Reconciliation Testing in ETL?

Balancing the ETL server load
Verifying that source and target data match after transformation
Reconciling differences between test and production environments
Balancing the database tables
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Q. What is the purpose of ETL Mapping Document Testing?

To test the network mapping
To verify that ETL processes follow the specifications in the mapping document
To create maps of data flow
To test geographical data mapping
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Q. What is the main goal of ETL Recovery Testing?

To test data backup processes
To verify the ETL system can recover from failures and resume processing
To recover lost data from source systems
To test system recovery after a hardware failure
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Q. What is the purpose of Data Consistency Testing in ETL?

To ensure data is consistently formatted
To verify data remains consistent across different tables and systems
To test the consistency of ETL job scheduling
To check if data is consistently backed up
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Q. What is the focus of ETL Integration Testing?

Testing individual ETL components in isolation
Verifying that all ETL components work together correctly
Integrating ETL with other business systems
Testing the integration of source and target databases
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Q. What is the purpose of Business Rule Testing in ETL?

To test the business logic of the source systems
To verify that ETL processes correctly implement business rules and logic
To create new business rules for data transformation
To test the business impact of ETL failures
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Q. What is the main objective of ETL Scalability Testing?

To test the ability of ETL processes to handle increased data volumes
To scale down ETL processes for smaller datasets
To test the scalability of the source systems
To scale up the number of ETL jobs
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Q. What is the purpose of ETL Error Handling Testing?

To create errors in the ETL process
To verify that ETL processes properly manage and report errors
To test error messages in the user interface
To handle errors in source data
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Q. What is the focus of ETL Audit Testing?

To audit the financial aspects of ETL projects
To verify that ETL processes maintain proper audit trails and logs
To audit the performance of ETL developers
To test the auditing features of the database
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Q. What is the purpose of Data Warehouse Testing in the context of ETL?

To test the physical structure of the data warehouse
To verify that data loaded into the warehouse is accurate and complete
To test the query performance of the data warehouse
To design the data warehouse schema
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Q. What is the main goal of ETL Data Validation Testing?

To validate the ETL tool's functionality
To ensure data accuracy and integrity throughout the ETL process
To validate the source data before extraction
To test the validation rules in the target system
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Q. What is the purpose of ETL Parallel Run Testing?

To run multiple ETL jobs simultaneously
To compare results of old and new ETL processes running in parallel
To test the parallel processing capabilities of ETL tools
To run ETL processes on parallel hardware
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Q. What is the focus of ETL Metadata Testing?

Testing the data about the data
Verifying the accuracy and completeness of metadata in the ETL process
Testing metadata management tools
Creating metadata for ETL documentation
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Q. What is the purpose of ETL Data Archiving Testing?

To test the backup of ETL job logs
To verify that data is correctly archived and retrievable after ETL processes
To archive old ETL scripts
To test the archiving of source system data
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Q. What is the main objective of ETL Rollback Testing?

To test the ability to undo ETL processes and restore previous data states
To roll back ETL software to previous versions
To test database rollback procedures
To roll back changes made to ETL scripts
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Q. What is the purpose of ETL Cross-Platform Testing?

To test ETL processes on different hardware platforms
To verify ETL functionality across different operating systems
To test data transfer between different database platforms
All of the above
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Q. What is the focus of ETL Data Reconciliation Testing?

To reconcile differences between test and production data
To verify that transformed data matches source data according to business rules
To reconcile financial data in the ETL process
To test data reconciliation tools
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