Top 20 SSIS Interview Questions and Answers
Updated 29 Sep 2024
Q1. why ssis over other technology
SSIS is preferred over other technologies for its robust ETL capabilities and seamless integration with other Microsoft products.
SSIS offers a user-friendly interface for designing and managing ETL processes
It provides a wide range of data transformation and workflow capabilities
SSIS integrates seamlessly with other Microsoft products like SQL Server and Azure
It has strong support for handling complex data integration scenarios
SSIS allows for easy scheduling and monitoring of...read more
Event handlers in SSIS are workflows that are triggered by specific events during the execution of a package.
Event handlers can be used to perform additional tasks or actions based on the success or failure of specific tasks within a package.
Common events that can trigger event handlers include OnError, OnPreExecute, OnPostExecute, OnWarning, etc.
Event handlers can be configured to send emails, log information, execute scripts, or perform other actions based on the event that...read more
Containers in SSIS are logical grouping of tasks and components that help in organizing and managing workflows.
Containers help in organizing and managing workflows in SSIS packages
They can be used to group related tasks together for better readability and maintenance
Examples of containers in SSIS include Sequence Container, For Loop Container, and Foreach Loop Container
Q4. How is SSIS related to SQL Server?
SSIS is a tool provided by Microsoft for data integration and workflow applications.
SSIS (SQL Server Integration Services) is a component of SQL Server used for building data integration and workflow applications.
It allows users to create packages to extract, transform, and load data from various sources into SQL Server databases.
SSIS can be used for tasks such as data migration, data warehousing, and ETL (Extract, Transform, Load) processes.
It provides a graphical interface ...read more
Q5. how to debug packages in SSIS
Debugging packages in SSIS involves using breakpoints, data viewers, logging, and error outputs.
Set breakpoints in control flow tasks to pause package execution for inspection.
Use data viewers to see data at various points in the package.
Enable logging to capture detailed information about package execution.
Redirect error outputs to handle and troubleshoot errors effectively.
Q6. What are the tools associated with SSIS?
SSIS tools include SQL Server Data Tools, SQL Server Management Studio, BIDS, and DTS Designer.
SQL Server Data Tools (SSDT) - used for building SSIS packages
SQL Server Management Studio (SSMS) - used for managing and deploying SSIS packages
Business Intelligence Development Studio (BIDS) - used for creating SSIS projects
DTS Designer - used for designing Data Transformation Services packages
Q7. How can we iterate files in ssis
Files in SSIS can be iterated using Foreach Loop Container or Script Task.
Use Foreach Loop Container to iterate through a list of files in a specified directory.
Set the Enumerator type to 'Foreach File Enumerator' and configure the necessary properties like file extension, file path, etc.
Alternatively, use a Script Task to programmatically iterate through files and perform custom actions.
Q8. diff among container in SSIS
Containers in SSIS are used to group related tasks and provide a way to manage the flow of data and control the execution of tasks.
Containers help in organizing and managing tasks in SSIS packages.
There are different types of containers in SSIS such as Sequence Container, For Loop Container, Foreach Loop Container, and Task Host Container.
Sequence Container is used to group tasks and define the order of execution.
For Loop Container is used to repeat a set of tasks for a speci...read more
SSIS Jobs
Q9. Skip rows in an excel in SSIS
Use Conditional Split transformation in SSIS to skip rows in Excel
Use Conditional Split transformation in SSIS to evaluate a condition for each row
Set up the condition to skip rows based on a specific criteria, such as row number or value in a column
Redirect the rows that meet the condition to a different output path to effectively skip them
Q10. Row level security in PBI package level information in SSIS
Row level security in Power BI allows restricting access to specific rows of data based on user roles. Package level information in SSIS refers to metadata about the SSIS package itself.
Row level security in Power BI can be implemented using roles and filters to control access to specific rows of data.
Package level information in SSIS includes details like package name, version, description, and connection managers used.
Row level security in Power BI is crucial for ensuring d...read more
Q11. Hove you ever done Performance tuning in SSIS if yes tell me the process?
Yes, I have done performance tuning in SSIS.
Identify bottlenecks using performance counters and logging
Optimize data flow by using appropriate transformations and buffer sizes
Use parallelism and concurrency to improve performance
Minimize network traffic by compressing data and using bulk load operations
Use caching and lookup transformations to reduce database queries
Profile and test the package to validate performance improvements
Q12. For each loop in SSIS
For each loop in SSIS
For each loop is used to iterate through a collection of items in SSIS
It can be used to loop through files, folders, database tables, etc.
The loop can be configured to run until a certain condition is met
Variables can be used to store the current item being processed
The loop can be nested within other loops or control flow tasks
Q13. Breakeven in ssis
Breakeven in SSIS refers to the point at which the costs of a project are equal to the revenue generated.
Breakeven in SSIS is calculated by dividing the fixed costs by the difference between the selling price per unit and the variable cost per unit.
It helps in determining the minimum number of units that need to be sold in order to cover all costs.
For example, if the fixed costs are $10,000, the selling price per unit is $20, and the variable cost per unit is $10, the breakev...read more
Q14. Different types of Transformation used in SSIS
SSIS uses various transformations like Derived Column, Lookup, Merge, etc.
Derived Column: Adds new columns or modifies existing ones based on expressions
Lookup: Retrieves data from a related table based on a common key
Merge: Combines data from multiple sources based on a common key
Aggregate: Performs calculations like sum, average, count, etc. on grouped data
Conditional Split: Routes data based on specified conditions
Q15. What is checkpoint in ssis
Checkpoint in SSIS is a feature that allows packages to restart from a specific point in case of failure.
Checkpoints are used to save the state of the package at specific points during execution.
They help in resuming package execution from the last successful checkpoint in case of failure.
Checkpoints can be configured at the package level or at the task level.
They are useful in scenarios where long-running packages need to be restarted without re-executing the entire process.
Different row transformations in SSIS include Conditional Split, Derived Column, Lookup, and Merge.
Conditional Split: Routes data rows to different outputs based on specified conditions.
Derived Column: Adds new columns or modifies existing columns using expressions.
Lookup: Retrieves data from a related table based on a specified key.
Merge: Combines data from multiple sources into a single dataset.
Q17. Performance tuning of ssis packages
Performance tuning of SSIS packages involves optimizing data flow, memory usage, and parallelism.
Optimize data flow by using efficient data sources and destinations
Minimize memory usage by using appropriate buffer sizes and reducing unnecessary data transformations
Increase parallelism by using multiple threads and optimizing task execution order
Use performance monitoring tools like SSIS logging and performance counters to identify bottlenecks
Consider using advanced techniques...read more
Q18. How to deploy the SSIS Packages?
SSIS Packages can be deployed using SQL Server Management Studio or the dtutil utility.
Deploy using SQL Server Management Studio by connecting to Integration Services and importing the package.
Deploy using dtutil utility by running a command like dtutil /FILE package.dtsx /COPY SQL;"FolderName" /QUIET.
Q19. Two files have different sets of columns in a file how to manage this in ssis
In SSIS, you can manage different sets of columns in two files by using conditional splits and dynamic column mapping.
Use a conditional split transformation to separate the data flow based on the file type or column presence
Create separate data flows for each file type and handle the columns accordingly
Use dynamic column mapping to map the columns dynamically based on the file type
You can use expressions and variables to dynamically handle the column mapping
Handle any additio...read more
Q20. what is provider in SSIS
In SSIS, a provider is a software component that allows SSIS to connect to different types of data sources.
Providers are used to establish connections to databases, files, and other data sources in SSIS.
Examples of providers include OLE DB provider, ODBC provider, and ADO.NET provider.
Providers are selected in SSIS connection managers when setting up connections to data sources.
Q21. Different Transformations in SSIS
SSIS provides various transformations to manipulate data during ETL process.
Data Conversion Transformation
Conditional Split Transformation
Aggregate Transformation
Sort Transformation
Merge Transformation
Lookup Transformation
Derived Column Transformation
Pivot Transformation
Unpivot Transformation
Q22. SCD Implementation in SSIS
SCD implementation in SSIS involves using Slowly Changing Dimension transformations to handle changing data in data warehouse.
Use Slowly Changing Dimension (SCD) transformations in SSIS to handle changing data in data warehouse
Identify Type 1, Type 2, or Type 3 changes and implement appropriate SCD logic
Utilize Lookup and Conditional Split components to compare incoming data with existing data and determine the type of change
Implement historical tracking of changes by maintai...read more
Top Interview Questions for Related Skills
Interview Questions of SSIS Related Designations
Interview experiences of popular companies
Reviews
Interviews
Salaries
Users/Month