Top SSIS Interview Questions (2024)
What is SSIS?
What are the various types of connections in SSIS?
Explain the difference between Package Deployment and Project Deployment in SSIS?
Explain Control Flow and Data Flow in SSIS?
Explain SSIS configurations and their types?
What is a Checkpoint in SSIS and how is it configured?
What are the logging options available in SSIS?
Explain the use of the "Execute SQL Task" in SSIS?
How to deploy an SSIS package to SQL Server?
What is the role of the SSIS Catalog in SQL Server?
How to handle errors in SSIS?
Explain the differences between SSIS and DTS (Data Transformation Services)?
What is the deployment model for SSIS 2012 and later versions?
How to handle package configurations in SSIS projects?
What is the use of the "Data Viewer" in SSIS?
Q: What is SSIS?
Ans:
SQL Server Integration Services (SSIS) is a platform for developing high-performance data integration and workflow applications. It enables you to take data from a variety of sources, change it, and load it into a variety of destinations.
Q: What are the various types of connections in SSIS?
Ans:
SSIS supports several types of connection types, including:
- OLE DB Connection: This type of connection is used to connect to a wide range of databases.
- Flat File Connection: This is used to read and write to flat files.
- Excel Connection: This is used to read or write to Excel files.
- ADO.NET Connection: This connection is used to connect to.NET data providers.
Q: Explain the difference between Package Deployment and Project Deployment in SSIS?
Ans:
Package Deployment is the process that deploys individual SSIS packages to SQL Server, whereas Project Deployment is the process of deploying the full project, which contains numerous packages, to SQL Server's Integration Services Catalog.
Q: Explain Control Flow and Data Flow in SSIS?
Ans:
In SSIS, Control Flow is used to handle the execution of tasks and containers. It manages the workflow by determining the sequence in which tasks are completed. Data Flow is a task that is in charge of transporting data between sources and destinations while also conducting transformations.
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Q: Explain SSIS configurations and their types?
Ans:
SSIS configurations are used to set package properties from external sources, providing control of package behavior without changing the package itself. For example, SQL Server configuration, XML configuration, Environment variable configuration etc.
Q: What is a Checkpoint in SSIS and how is it configured?
Ans:
In SSIS, a checkpoint is an approach that allows the package to be restarted from the point of failure rather than rerunning the full package. To configure a checkpoint, set the "CheckpointUsage" attribute in the package properties to "IfExists" and specify the location of the checkpoint file.
Q: What are the logging options available in SSIS?
Ans:
To track package execution, SSIS supports many logging options. Some of them are text file logging, SQL Server Profiler, SQL Server, Windows Event Log, and so on.
Q: Explain the use of the "Execute SQL Task" in SSIS?
Ans:
The "Execute SQL Task" command is used to run SQL queries or stored procedures from within an SSIS package. It is frequently used to execute pre- or post-processing activities, truncate tables, and update control tables, among other things.
Q: How to deploy an SSIS package to SQL Server?
Ans:
Users can deploy an SSIS package to SQL Server by right-clicking the project and selecting "Deploy" or by deploying straight to the Integration Services Catalog using the SQL Server Data Tools (SSDT).
Q: What is the role of the SSIS Catalog in SQL Server?
Ans:
The SSIS Catalog is a database that stores the deployed projects and packages. It provides an organised method for managing, executing, and monitoring packages.
Q: How to handle errors in SSIS?
Ans:
SSIS provides error management via event handlers such as OnError, OnWarning, OnTaskFailed, and so on. When errors occur during package execution, users can utilize these event handlers for performing particular actions.
Q: Explain the differences between SSIS and DTS (Data Transformation Services)?
Ans:
In comparison to DTS, SSIS delivers enhanced features, higher performance, and greater flexibility in data integration and transformation operations.
Q: What is the deployment model for SSIS 2012 and later versions?
Ans:
SSIS 2012 and later versions use the Project Deployment Model, in which all packages and their dependencies are deployed as a project to SQL Server's Integration Services Catalog.
Q: How to handle package configurations in SSIS projects?
Ans:
SSIS projects provide a "Package Configuration Organizer" for managing package configurations. Configurations can be enabled or disabled, prioritized, and stored in a specific location.
Q: What is the use of the "Data Viewer" in SSIS?
Ans:
The "Data Viewer" is a valuable debugging tool in SSIS that allows you to see the data flowing via a data flow path as the package is being executed. It helps in the inspection and validation of data during development.