When you run a package from with in BIDS,it is built and temporarily deployed to the folder. By default the package will be deployed to the BIN folder in the Package’s Project folder and you can configure for custom folder for deployment. When the Package’s execution is completed and stopped in BIDS,the deployed package will be deleted and this is called as Design Time Deployment.
Explain Multicast Transformation?
This transformation sends output to multiple output paths with no conditional as Conditional Split does. Takes ONE Input and makes the COPY of data and passes the same data through many outputs. In simple Give one input and take many outputs of the same data.
Explain Percentage and row sampling Transformations?
This transformation will take data from source and randomly sampling data. It gives you 2 outputs. First is selected data and second one is unselected data. It is used in situation where you train data mining model. These two are used to take the SAMPLE of data from the input data.
Explain Sort Transformation?
This component will sort data, similar in TSQL command ORDER BY. Some transformations need sorted data.
Explain Union all Transformation?
It works in opposite way to Merge transformation. It can take output from more than 2 input paths and combines into single output path.
What r the possible locations to save SSIS package?
You can save a package wherever you want.
SQL Server
Package Store
File System
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| CDW Most Frequently Asked Latest SSIS Interview Questions Answers |
What is a package?
A discrete executable unit of work composed of a collection of control flow and other objects, including data sources, transformations, process sequence, and rules, errors and event handling, and data destinations.
What is a workflow in SSIS?
A workflow is a set of instructions on how to execute tasks.
(It is a set of instructions on how to execute tasks such as sessions, emails and shell commands. a workflow is created form work flow mgr.
What is the diff between control flow Items and data flow Items?
The control flow is the highest level control process. It allows you to manage the run-time process activities of data flow and other processes within a package.
When we want to extract, transform and load data within a package. You add an SSIS dataflow task to the package control flow.
What are the main component of SSIS(project-architecture)?
SSIS architecture has 4 main components
1.ssis service
2.ssis runtime engine & runtime executables
3.ssis dataflow engine & dataflow components
4.ssis clients
Different components in SSIS package?
Control flow
Data flow
Event handler
Package explorer
What are Connection Managers?
It is a bridge b/w package object and physical data. It provides logical representation of a connection at design time the properties of the connection mgr describes the physical connection that integration services creates when the package is run.
Explain what is SSIS?
SSIS or SQL Server Integration Services (SSIS) is a component of Microsoft SQL Server, which can be used to accomplish a broad range of data migration tasks.
Mention what are the possible locations to save SSIS package?
You can save SSIS package at
SQL Server
Package Store
File System
What will be your first approach if the package that runs fine in Business Intelligence Development Studio (BIDS) but fails when running from an SQL agent job?
The account that runs SQL Agent Jobs might not have the required permission for one of the connections in your package. In such cases, either you can create a proxy account or elevate the account permissions.
Explain what is connection managers in SSIS?
While gathering data from different sources and writing it to a destination, connection managers are helpful. Connection manager facilitates the connection to the system that include information’s like data provider information, server name, authentication mechanism, database name, etc.
Explain what is SSIS breakpoint?
A breakpoint enables you to pause the execution of the package in business intelligence development studio during troubleshooting or development of an SSIS package.
Explain what is event logging in SSIS?
In SSIS, event logging allows you to select any specific event of a task or a package to be logged. It is very helpful when you are troubleshooting your package to understand the performance package.
Explain what is logging mode property?
SSIS packages and all the associated tasks have a property called LoggingMode. This property accepts three possible values
Disabled: To disable logging of the component
Enabled: To enable logging of the component
UseParentSetting: To use parent’s setting of the component
Explain what is a data flow buffer?
SSIS operates using buffers; it is a kind of an in-memory virtual table to hold data.
Explain what is a container? How many types of containers are there in SSIS?
In SSIS, a container is a logical grouping of tasks, and it allows to manage the scope of a task together.
Types of containers in SSIS are
Sequence container
For loop container
Foreach loop container
Task host container
Explain what is Precedence Constraint in SSIS?
Precedence Constraint in SSIS enables you to define the logical sequence of tasks in the order they should be executed. You can connect all the tasks using connectors- Precedence Constraints.
Explain what variables in SSIS and what are the types of variables in SSIS?
Variable in SSIS is basically used to store values. In SSIS, there are two types of variables system variable and user variable.
Mention what are the important components of SSIS package?
The important component in SSIS package are
Data flow
Control flow
Package explorer
Event handler
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