SSIS SSRS SSAS Interview Questions

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Top most important SSIS SSRS SSAS interview questions and answers by Experts:

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1.What do we mean by dataflow in SSIS?
Data flow is nothing but the flow of data from the corresponding sources to the referred destinations. In this process, the data transformations make changes to the data to make it ready for the data warehouse.
2•What is a breakpoint in SSIS? How is it setup? How do you disable it?
A breakpoint is a stopping point in the code. The breakpoint can give the Developer\DBA an
opportunity to review the status of the data, variables and the overall status of the SSIS package.
10 unique conditions exist for each breakpoint.
Breakpoints are setup in BIDS. In BIDS, navigate to the control flow interface. Right click on the
object where you want to set the breakpoint and select the ‘Edit Breakpoints…’ option.
3•Can you name 5 or more of the native SSIS connection managers?
1) OLEDB connection – Used to connect to any data source requiring an OLEDB connection (i.e.,
SQL Server 2000)
2) Flat file connection – Used to make a connection to a single file in the File System. Required for reading information from a File System flat file
3) ADO.Net connection – Uses the .Net Provider to make a connection to SQL Server 2005 or other
connection exposed through managed code (like C#) in a custom task
4) Analysis Services connection – Used to make a connection to an Analysis Services database or project. Required for the Analysis Services DDL Task and Analysis Services Processing Task
5) File connection – Used to reference a file or folder. The options are to either use or create a file or folder
6) Excel
4• What is the use of Bulk Insert Task in SSIS?
Bulk Insert Task is used to upload large amount of data from flat files into Sql Server. It supports only OLE DB connections for destination database.
5• What is Conditional Split transformation in SSIS?
This is just like IF condition which checks for the given condition and based on the condition evaluation, the output will be sent to the appropriate OUTPUT path. It has ONE input and MANY outputs. Conditional Split transformation is used to send paths to different outputs based on some conditions. For example, we can organize the transform for the students in a class who have marks greater than 40 to one path and the students who score less than 40 to another path.
6• How do you eliminate quotes from being uploaded from a flat file to SQL Server?
This can be done using TEXT QUALIFIER property. In the SSIS package on the Flat File Connection Manager Editor, enter quotes into the Text qualifier field then preview the data to ensure the quotes are not included.
7• Can you explain how to setup a checkpoint file in SSIS?
The following items need to be configured on the properties tab for SSIS package:
CheckpointFileName – Specify the full path to the Checkpoint file that the package uses to save the value of package variables and log completed tasks. Rather than using a hard-coded path as shown above, it’s a good idea to use an expression that concatenates a path defined in a package variable and the package name.
CheckpointUsage – Determines if/how checkpoints are used. Choose from these options: Never(default), IfExists, or Always. Never indicates that you are not using Checkpoints. IfExists is the typical setting and implements the restart at the point of failure behavior. If a Checkpoint file is found it is used to restore package variable values and restart at the point of failure. If a Checkpoint file is not found the package starts execution with the first task. The Always choice raises an error if the Checkpoint file does not exist.
SaveCheckpoints – Choose from these options: True or False (default). You must select True to implement the Checkpoint behavior.
8• What are the different values you can set for CheckpointUsage property ?
There are three values, which describe how a checkpoint file is used during package execution:
1) Never: The package will not use a checkpoint file and therefore will never restart.
2) If Exists: If a checkpoint file exists in the place you specified for the CheckpointFilename property, then it will be used, and the package will restart according to the checkpoints written.
3) Always: The package will always use a checkpoint file to restart, and if one does not exist, the package will fail.
9• What is the ONLY Property you need to set on TASKS in order to configure CHECKPOINTS to RESTART package from failure?
The one property you have to set on the task is FailPackageOnFailure. This must be set for each task or container that you want to be the point for a checkpoint and restart. If you do not set this property to true and the task fails, no file will be written, and the next time you invoke the package, it will start from the beginning again.
10• Where can we set the CHECKPOINTS, in DataFlow or ControlFlow ?
Checkpoints only happen at the Control Flow; it is not possible to checkpoint transformations or restart inside a Data Flow. The Data Flow Task can be a checkpoint, but it is treated as any other task.
11• Can you explain different options for dynamic configurations in SSIS?
1) XML file
2) custom variables
3) Database per environment with the variables
4) Use a centralized database with all variables
12• What is the use of Percentage Sampling transformation in SSIS?
Percentage Sampling transformation is generally used for data mining. This transformation builds a random sample of set of output rows by choosing specified percentage of input rows. For example if the input has 1000 rows and if I specify 10 as percentage sample then the transformation returns 10% of the RANDOM records from the input data.
13• What is the use of Term Extraction transformation in SSIS?
Term Extraction transformation is used to extract nouns or noun phrases or both noun and noun phrases only from English text. It extracts terms from text in a transformation input column and then writes the terms to a transformation output column. It can be also used to find out the content of a dataset.
14• What is Data Viewer and what are the different types of Data Viewers in SSIS?
A Data Viewer allows viewing data at a point of time at runtime. If data viewer is placed before and after the Aggregate transform, we can see data flowing to the transformation at the runtime and how it looks like after the transformation occurred. The different types of data viewers are:
1. Grid
2. Histogram
3. Scatter Plot
4. Column Chart.
15• What is Ignore Failure option in SSIS?
In Ignore Failure option, the error will be ignored and the data row will be directed to continue on the next transformation. Let’s say you have some JUNK data(wrong type of data or JUNK data) flowing from source, then using this option in SSIS we can REDIRECT the junk data records to another transformation instead of FAILING the package. This helps to MOVE only valid data to destination and JUNK can be captured into separate file.
16• Which are the different types of Control Flow components in SSIS?
The different types of Control Flow components are: Data Flow Tasks, SQL Server Tasks, Data Preparation Tasks, Work flow Tasks, Scripting Tasks, Analysis Services Tasks, Maintenance Tasks, Containers.
17• What are containers? What are the different types of containers in SSIS?
Containers are objects that provide structures to packages and extra functionality to tasks. There are four types of containers in SSIS, they are: Foreach Loop Container, For Loop Container, Sequence Container and Task Host Container.
18• What are the different types of Data flow components in SSIS?
There are 3 data flow components in SSIS.
1. Sources
2. Transformations
3. Destinations
19• What are the different types of data sources available in SSIS?
There are 7 types of data sources provided by SSIS: a.) Data Reader source b.) Excel source c.) Flat file source d.) OLEDB source e.) Raw file source f.) XML source g.) Script component
20• What is SSIS Designer?
It is a graphical tool for creating packages. It has 4 tabs: Control Flow, Data Flow, Event Handlers and Package Explorer.
21• What is Control Flow tab?
It is the tab in SSIS designer where various Tasks can be arranged and configured. This is the tab where we provide and control the program flow of the project.
22• What is Data Flow tab?
This is the tab where we do all the work related to ETL job. It is the tab in SSIS Designer where we can extract data from sources, transform the data and then load them into destinations.
23• What is the function of control flow tab in SSIS?
On the control flow tab, the tasks including dataflow task, containers and precedence constraints that connect containers and tasks can be arranged and configured.
24• What is the function of Event handlers tab in SSIS?
On the Event handlers tab, workflows can be configured to respond to package events.
For example, we can configure Work Flow when ANY task Failes or Stops or Starts ..
25• What is the function of Package explorer tab in SSIS?
This tab provides an explorer view of the package. You can see what is happening in the package. The Package is a container at the top of the hierarchy.
26• What is Solution Explorer?
It is a place in SSIS Designer where all the projects, Data Sources, Data Source Views and other miscellaneous files can be viewed and accessed for modification.
27• How do we convert data type in SSIS?
The Data Conversion Transformation in SSIS converts the data type of an input column to a different data type.
28• How are variables useful in ssis package?
Variables can provide communication among objects in the package. Variables can provide communication between parent and child packages. Variables can also be used in expressions and scripts. This helps in providing dynamic values to tasks.
29• Explain Aggregate Transformation in SSIS?
It aggregates data, similar you do in applying TSQL functions like Group By, Min, Max, Avg, and Count. For example you get total quantity and Total line item for each product in Aggregate Transformation Editor. First you determine input columns, then output column name in Output Alias table in datagrid, and also operations for each Output Alias in Operation columns of the same datagrid. Some of operation functions listed below :
• Group By
• Average
• Count
• Count Distinct : count distinct and non null column value
• Min, Max, Sum
In Advanced tab, you can do some optimization here, such as setting up Key Scale option (low, medium, high), Count Distinct scale option (low, medium, high), Auto Extend factor and Warn On Division By Zero. If you check Warn On Division By Zero, the component will give warning instead of error. Key Scale option will optimize transformation cache to certain number of key threshold. If you set it low, optimization will target to 500,000 keys written to cache, medium can handle up to 5 million keys, and high can handle up to 25 million keys, or you can specify particular number of keys here. Default value is unspecified. Similar to number of keys for Count Distinct scale option. It is used to optimize number of distinct value written to memory, default value is unspecified. Auto Extend Factor is used when you want some portion of memory is used for this component. Default value is 25% of memory.
30• Explain Audit Transformation ?
It allows you to add auditing information as required in auditing world specified by HIPPA and Sarbanes-Oxley (SOX). Auditing options that you can add to transformed data through this transformation are :
1. Execution of Instance GUID : ID of execution instance of the package
2. PackageID : ID of the package
3. PackageName
4. VersionID : GUID version of the package
5. Execution StartTime
6. MachineName
7. UserName
8. TaskName
9. TaskID : uniqueidentifier type of the data flow task that contains audit transformation.
31• Explain Character Map Transformation?
It transforms some character. It gives options whether output result will override the existing column or add to new column. If you define it as new column, specify new column name. Operations available here are:
1. Uppercase
2. Lowercase
3. Byte reversal : such as from 0×1234 to 0×4321
4. Full width
5. Half width
6. Hiragana/katakana/traditional Chinese/simplified Chinese
7. Linguistic casing
32• Explain Conditional split Transformation ?
It functions as if…then…else construct. It enables send input data to a satisfied conditional branch. For example you want to split product quantity between less than 500 and greater or equal to 500. You can give the conditional a name that easily identifies its purpose. Else section will be covered in Default Output Column name.
After you configure the component, it connect to subsequent transformation/destination, when connected, it pops up dialog box to let you choose which conditional options will apply to the destination transformation/destination.
33• Explain Copy column Transformation?
This component simply copies a column to another new column. Just like ALIAS Column in T-Sql.
34• Explain Data conversion Transformation?
This component does conversion data type, similar to TSQL function CAST or CONVERT. If you wish to convery the data from one type to another then this is the best bet. But please make sure that you have COMPATABLE data in the column.
35• Explain Data Mining query Transformation?
This component does prediction on the data or fills gap on it. Some good scenarios uses this component is:
1. Take some input columns as number of children, domestic income, and marital income to predict whether someone owns a house or not.
2. Take prediction what a customer would buy based analysis buying pattern on their shopping cart.
3. Filling blank data or default values when customer doesn’t fill some items in the questionnaire.
36• Explain Derived column Transformation?
Derived column creates new column or put manipulation of several columns into new column. You can directly copy existing or create a new column using more than one column also.
37• Explain Merge Transformation?
Merge transformation merges two paths into single path. It is useful when you want to break out data into path that handles errors after the errors are handled, the data are merge back into downstream or you want to merge 2 data sources. It is similar with Union All transformation, but Merge has some restrictions :
1. Data should be in sorted order
2. Data type , data length and other meta data attribute must be similar before merged.
38• Explain Merge Join Transformation?
Merge Join transformation will merge output from 2 inputs and doing INNER or OUTER join on the data. But if you the data come from 1 OLEDB data source, it is better you join through SQL query rather than using Merge Join transformation. Merge Join is intended to join 2 different data source.
39• 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.
40• 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.
41• Explain Sort Transformation?
This component will sort data, similar in TSQL command ORDER BY. Some transformations need sorted data.
42• 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.
43• What r the possible locations to save SSIS package?
You can save a package wherever you want.
SQL Server
Package Store
File System
44• 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.
45• 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.
46• 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.
47• 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
48• Different components in SSIS package?
Control flow
Data flow
Event handler
Package explorer
49• 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.
50• What is environment variable in SSIS?
An environment variable configuration sets a package property equal to the value in an environment variable.
Environmental configurations are useful for configuring properties that are dependent on the computer that is executing the package.
51• How to provide securIty to packages?
We can provide security in two ways
1. Package encryption
2. Password protection.
52• What are Precedence constraints?
Constraints that link executable, container, and tasks wIthin the package control flow and specify condItion that determine the sequence and condItions for determine whether executable run.
53• What is Design time Deployment in SSIS ?
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.

54. Explain architecture of SSIS?
SSIS architecture consists of four key parts:
a) Integration Services service: monitors running Integration Services packages and manages the storage of packages.
b) Integration Services object model: includes managed API for accessing Integration Services tools, command-line utilities, and custom applications.
c) Integration Services runtime and run-time executables: it saves the layout of packages, runs packages, and provides support for logging, breakpoints, configuration, connections, and transactions. The Integration Services run-time executables are the package, containers, tasks, and event handlers that Integration Services includes, and custom tasks.
d) Data flow engine: provides the in-memory buffers that move data from source to destination.
55.How would you do Logging in SSIS?
Logging Configuration provides an inbuilt feature which can log the detail of various events like onError, onWarning etc to the various options say a flat file, SqlServer table, XML or SQL Profiler.

56. How would you do Error Handling?
A SSIS package could mainly have two types of errors
a) Procedure Error: Can be handled in Control flow through the precedence control and redirecting the execution flow.
b) Data Error: is handled in DATA FLOW TASK buy redirecting the data flow using Error Output of a component.

57. How to pass property value at Run time? How do you implement Package Configuration?
A property value like connection string for a Connection Manager can be passed to the pkg using package configurations.Package Configuration provides different options like XML File, Environment Variables, SQL Server Table, Registry Value or Parent package variable.

58. How would you deploy a SSIS Package on production?
A) Through Manifest
1. Create deployment utility by setting its propery as true .
2. It will be created in the bin folder of the solution as soon as package is build.
3. Copy all the files in the utility and use manifest file to deply it on the Prod.
B) Using DtsExec.exe utility
C)Import Package directly in MSDB from SSMS by logging in Integration Services.

59. Difference between DTS and SSIS?
Every thing except both are product of Microsoft.

60. What is Execution Tree?

Execution trees demonstrate how package uses buffers and threads. At run time, the data flow engine breaks down Data Flow task operations into execution trees. These execution trees specify how buffers and threads are allocated in the package. Each tree creates a new buffer and may execute on a different thread. When a new buffer is created such as when a partially blocking or blocking transformation is added to the pipeline, additional memory is required to handle the data transformation and each new tree may also give you an additional worker thread.

61. Difference between Unionall and Merge Join?

a) Merge transformation can accept only two inputs whereas Union all can take more than two inputs

b) Data has to be sorted before Merge Transformation whereas Union all doesn’t have any condition like that.

62. May get question regarding what X transformation do?

Lookup, fuzzy lookup, fuzzy grouping transformation are my favorites.
For you.

63.How would you restart package from previous failure point?What are Checkpoints and how can we implement in SSIS?
When a package is configured to use checkpoints, information about package execution is written to a checkpoint file. When the failed package is rerun, the checkpoint file is used to restart the package from the point of failure. If the package runs successfully, the checkpoint file is deleted, and then re-created the next time that the package is run.

64. Where are SSIS package stored in the SQL Server?
MSDB.sysdtspackages90 stores the actual content and ssydtscategories, sysdtslog90, sysdtspackagefolders90, sysdtspackagelog, sysdtssteplog, and sysdtstasklog do the supporting roles.

65.How would you schedule a SSIS packages?
Using SQL Server Agent. Read about Scheduling a job on Sql server Agent

66. Difference between asynchronous and synchronous transformations?
Asynchronous transformation have different Input and Output buffers and it is up to the component designer in an Async component to provide a column structure to the output buffer and hook up the data from the input.

67. How to achieve parallelism in SSIS?
Parallelism is achieved using MaxConcurrentExecutable property of the package. Its default is -1 and is calculated as number of processors + 2.

-More questions added-Sept 2011
68. How do you do incremental load?
Fastest way to do incremental load is by using Timestamp column in source table and then storing last ETL timestamp, In ETL process pick all the rows having Timestamp greater than the stored Timestamp so as to pick only new and updated records

69. How to handle Late Arriving Dimension or Early Arriving Facts.

Late arriving dimensions sometime get unavoidable ‘coz delay or error in Dimension ETL or may be due to logic of ETL. To handle Late Arriving facts, we can create dummy Dimension with natural/business key and keep rest of the attributes as null or default. And as soon as Actual dimension arrives, the dummy dimension is updated with Type 1 change. These are also known as Inferred Dimensions.

70. WHAT is SQL Server Reporting Services(SSRS)?
SQL Server Reporting Services is a server-based reporting platform that you can use to create and manage tabular, matrix, graphical, and free-form reports that contain data from relational and multidimensional data sources. The reports that you create can be viewed and managed over a World Wide Web-based connection
71. What are the three stages of Enterprise Reporting Life Cycle ?
a. Authoring
b. Management
c. Access and Delivery

72. What are the components included in SSRS?
1. A Complete set of Tools that can be used to create, manage and view reports
2. A Report Server component that hosts and processes reports in a variety of formats. Output formats include HTML, PDF, TIFF, Excel, CSV, and more.
3.An API that allows developers to integrate or extend data and report processing in custom applications, or create custom tools to build and manage reports.

73. What is the benefit of using embedded code in a report?
1. Reuseability of Code: function created in embedded code to perform a logic can be then used in multiple expressions
2. Centralized code: helps in better manageability of code.
74. Which programming language can be used to code embedded functions in SSRS?
Visual Basic .NET Code.

75. Important terms used in the reporting services?

1. Report definition: The blueprint for a report before the report is processed or rendered. A report definition contains information about the query and layout for the report.

2. Report snapshot: A report that contains data captured at a specific point in time. A report snapshot is actually a report definition that contains a dataset instead of query instructions.

3. Rendered report: A fully processed report that contains both data and layout information, in a format suitable for viewing (such as HTML).

4. Parameterized report: A published report that accepts input values through parameters.

5. Shared data source: A predefined, standalone item that contains data source connection information.

6. Shared schedule: A predefined, standalone item that contains schedule information.

7. Report-specific data source: Data source information that is defined within a report definition.

8. Report model: A semantic description of business data, used for ac hoc reports created in Report Builder.

9. Linked report: A report that derives its definition through a link to another report.

10. Report server administrator: This term is used in the documentation to describe a user with elevated privileges who can access all settings and content of a report server. If you are using the default roles, a report server administrator is typically a user who is assigned to both the Content Manager role and the System Administrator role. Local administrators can have elevated permission even if role assignments are not defined for them.

11. Folder hierarchy: A bounded namespace that uniquely identifies all reports, folders, report models, shared data source items, and resources that are stored in and managed by a report server.
12. Report Server: Describes the Report Server component, which provides data and report processing, and report delivery. The Report Server component includes several subcomponents that perform specific functions.

13. Report Manager: Describes the Web application tool used to access and manage the contents of a report server database.

14. Report Builder: Report authoring tool used to create ad hoc reports.

15. Report Designer: Report creation tool included with Reporting Services.

16. Model Designer: Report model creation tool used to build models for ad hoc reporting.

17. Report Server Command Prompt Utilities: Command line utilities that you can use to administer a report server.
a) RsConfig.exe, b) RsKeymgmt.exe, c) Rs.exe

76. what are the Command Line Utilities available In Reporting Services?
• Rsconfig Utility (Rsconfig.exe): encrypts and stores connection and account values in the RSReportServer.config file. Encrypted values include report server database connection information and account values used for unattended report processing
• RsKeymgmt Utility: Extracts, restores, creates, and deletes the symmetric key used to protect sensitive report server data against unauthorized access
• RS Utility: this utility is mainly used to automate report server deployment and administration tasks.Processes script you provide in an input file.

77. What is difference between Tablular and Matrix report?

Tablular report: A tabular report is the most basic type of report. Each column corresponds to a column selected from the database.

Matrix report: A matrix (cross-product) report is a cross-tabulation of four groups of data:
a. One group of data is displayed across the page.
b. One group of data is displayed down the page.
c. One group of data is the cross-product, which determines all possible locations where the across and down data relate and places a cell in those locations.
d. One group of data is displayed as the “filler” of the cells.
Martix reports can be considered more of a Pivot table.

78. How to create Drill-through reports?
Using Navigation property of a cell and setting child report and its parameters in it.

79. How to create Drill-Down reports?
To cut the story short:
– By grouping data on required fields
-Then toggle visibility based on the grouped filed

80. What is Query parameter in SSRS?
Query parameters is mentioned in the query of the datasources that are to be included into the SQL script’s WHERE clause of the SQL that can accept parameters. Query parameters begin with the symbol @.The name should not contain spaces and can not begin with numeral. For clarity, we use only letters.
81. What are the Reporting Service Components in SSRS?
Report Designer: A place where we can create report. Report Server: Provides services for implementation and delivery of reports. Report Manager: A Web-based administration tool for managing the Report Server.
82. What is a matrix in SSRS?
 A matrix is a data region linked to a report set. Matrix allows us to create crosstab reports with the report variables displaying on rows and columns. It allows us to drag and drop fields into it.
83. What are sub reports and how to create them?
A sub report is like any other reports which can be called in main report and can be generate through main report. Parameters can be passed from main report to sub report and basis of that report can be generated.
84. What is the report model project?
Report model project is for creating Adhoc reporting. You can create the adhoc reports through report builder. Report model project can be created on bids or report server. This model can have simple view. And using
85. What is report server project?
Report Server Project contains the RDL file and it need to be deployed on report server to view the report files to application and user. It a solution where we design our reports. You can add it by going into BIDS clicking on new item and then selecting reports server project. Once the solution is created you can start creating reports.
86. What is the report builder?
Report builder is used to create small reports and it a define interface. You can’t change the report interface in report builder it pre designed. You can just drag columns in the report. Report builder creates reports on database objects available with report model project.
87.In which SQL Server version report builder introduced?
Report builder introduced in SQL Server 2005. While creating or deploying report model project on report server you can get error or it might not get created. For this you need to check whether the service pack 22 is installed or not.

88. How to deploy the Report?
Report can be deployed in three ways.
1. Using visual studio: In visual studio you can directly deploy the report through solution explorer by providing the report server URL in project properties at Target Server URL. This will deploy entire project or single report as per you selection.
2. Using report server: Can directly go to the report server and deploy the report by browsing the report from the disk location on server.
3. Creating the utility: SQL server provides the utility using that which can be used to create a customize utility for your report deployment in bulk.
89. What is RS.exe utility?
Rs.exe utility is used for deploying the report on report server. It comes with the report server and can be customize accordingly.
90. What is the name of reporting services config file and what’s it’s used for?
Reporting service config file is used for report configuration details. It contains the report format and also the report import types. Report service config reside at ISS.
91.What are the three different part of RDL file explain them?
In visual studio RDL files has three parts.
1. Data: It contains the dataset on which we write the query. Data set is connected with data source.
2. Design: In design you can design report. Can create tables and matrix reports. Drag columns values from source.
3. Preview: to check the preview after the report run.
92. Which language rdl files made of?
RDL files are written in XML.
93.What is the chart in report?
 Chart reports are for graphical representation. You can get pie charts columns harts and various other options. 3d charts are also available in reporting services.
94. What is Data Set in report?
Data set are the set of data which we want to show in report. Data creates on data source. Data source is the source of data from where we are getting this data i.e. database server and database name connection string.
95. What are the different types of data sources in SSRS?
SSRS use different data source. Some of them are listed below.
1. Microsoft SQL Server
2. OLEDB
3. Oracle
4. ODBC
5. SQL Server Analysis Service
6. Report Server Model
7. SAP Net weaver BI
8. Hyperion
9. Teradata
10. XML
96. What is the web service used for reporting services?
Reporting Service Web Service used in SSRS. By accessing this web service you can access all report server component and also get the report deployed on report server.
97. How to add the custom code in Report?
To add the custom codes in report go to report tab on top then properties and there you will find the options for custom code.
98. What is a cache in SSRS?
Report server can lay up a copy of processed report in a memory and return the copy when a user opens the report. This server memory is known as cache and the process is called caching.