Free ETL Testing Basic Questions and Answers

Question 1

___ automates ETL testing and management to make sure the data don't affect production systems.

Accepted Answer

Informatica Data Validation

Answer

'Informatica Data Validation' is a specific tool or suite offered by Informatica, a leading data integration vendor, designed to automate ETL testing and data quality management. It helps ensure that data moving through ETL pipelines is accurate, complete, and consistent, thereby preventing data quality issues from affecting production systems. This automation streamlines the testing process and improves data reliability.

Question 2

Testing the changed data values against the expected data values is called ___ testing.

Accepted Answer

Source to target

Answer

'Source to target' testing, also known as data transformation testing, involves comparing the transformed data values in the target system against the expected data values based on the source data and defined transformation rules. This type of testing verifies that all business logic and transformations applied during the ETL process have been executed accurately. It ensures data integrity and correctness after the transformation phase.

Question 3

Data types, data lengths, indexes, and constraints are all measured as part of __ testing.

Accepted Answer

Metadata

Answer

'Metadata testing' focuses on validating the structural information about the data, rather than the data values themselves. This includes checking data types, data lengths, indexes, constraints, and other schema-related attributes in both source and target systems. Ensuring metadata consistency is crucial for the proper functioning of the data warehouse and downstream applications.

Question 4

Difficult data will be reported by __ tests if there are invalid characters, invalid character patterns, or wrong upper- or lowercase case.

Accepted Answer

Syntax

Answer

'Syntax' tests are designed to identify data that does not conform to predefined patterns or rules for its format. These tests will report difficult data if it contains invalid characters, incorrect character patterns, or improper casing (e.g., wrong upper- or lowercase). Syntax testing ensures that data adheres to expected structural formats, which is crucial for data quality and usability.

Question 5

When new data is introduced to existing data, a data integrity test is performed for ___ testing.

Accepted Answer

Incremental ETL

Answer

'Incremental ETL' testing is performed when new data is added to an existing data warehouse or target system. This type of testing focuses on ensuring that only the new or changed data is correctly extracted, transformed, and loaded without corrupting or duplicating existing data. It's essential for maintaining data integrity and efficiency in ongoing data loading processes.

ETL Testing - extract, transform, load Practice Test

ETL Testing - extract, transform, load Practice Test

Free ETL Testing Basic Questions and Answers