10 Cognos Interview Questions and Answers in 2023

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As the demand for Cognos professionals continues to grow, it is important to be prepared for the interview process. This blog post will provide an overview of 10 Cognos interview questions and answers that are likely to be asked in 2023. With the right preparation, you can be confident in your ability to answer these questions and demonstrate your knowledge of the Cognos platform.

1. Describe the process of creating a report in Cognos using the Report Studio.

Creating a report in Cognos Report Studio involves several steps.

1. First, you need to create a data source connection. This can be done by selecting the “Create New Data Source” option from the “Data Source” tab in the Report Studio. You can then select the type of data source you want to use, such as a relational database, a cube, or a flat file. Once you have selected the type of data source, you can enter the connection details, such as the server name, database name, and user credentials.

2. Once the data source connection is established, you can create a query. This can be done by selecting the “Create New Query” option from the “Query” tab in the Report Studio. You can then select the data source you want to use and the tables or views you want to include in the query. You can also add filters, sorts, and calculations to the query.

3. After the query is created, you can create the report layout. This can be done by selecting the “Create New Report” option from the “Report” tab in the Report Studio. You can then select the query you want to use and the type of report you want to create, such as a list, crosstab, or chart. You can then add objects to the report, such as text boxes, images, and charts. You can also add formatting to the report, such as fonts, colors, and borders.

4. Finally, you can preview and publish the report. This can be done by selecting the “Preview” or “Publish” option from the “Report” tab in the Report Studio. You can then view the report in the Report Studio or publish it to the Cognos portal.


2. How do you troubleshoot errors in a Cognos report?

When troubleshooting errors in a Cognos report, the first step is to identify the source of the error. This can be done by examining the report log, which contains detailed information about the report execution. The log will provide information about any errors that occurred during the report execution, such as syntax errors, data errors, or other issues.

Once the source of the error has been identified, the next step is to determine the cause of the error. This can be done by examining the report query, data sources, and report objects. If the error is related to the query, it may be necessary to modify the query to resolve the issue. If the error is related to the data sources, it may be necessary to check the data sources for any issues. If the error is related to the report objects, it may be necessary to modify the report objects to resolve the issue.

Once the cause of the error has been identified, the next step is to resolve the issue. This can be done by making the necessary changes to the query, data sources, or report objects. Once the changes have been made, the report should be tested to ensure that the issue has been resolved.

Finally, it is important to document the changes that were made to the report. This will help to ensure that any future errors can be quickly identified and resolved.


3. What is the difference between a package and a report in Cognos?

A package in Cognos is a collection of metadata that is used to create a report. It contains the data source information, the query objects, and the report objects. Packages are used to create reports, and they can be used to create multiple reports from the same data source.

A report in Cognos is the output of a package. It is the visual representation of the data that is created from the package. Reports can be created in a variety of formats, such as HTML, PDF, Excel, and CSV. Reports can also be customized with formatting, charts, and other visual elements.


4. How do you optimize a Cognos report for performance?

Optimizing a Cognos report for performance involves a few different steps.

1. First, it is important to ensure that the data source is optimized. This includes making sure that the query is written efficiently and that the database is properly indexed.

2. Next, it is important to ensure that the report is designed efficiently. This includes using the appropriate data items, using the correct data types, and avoiding unnecessary calculations.

3. It is also important to ensure that the report is rendered efficiently. This includes using the appropriate layout and formatting options, using the correct page size, and avoiding unnecessary formatting.

4. Finally, it is important to ensure that the report is distributed efficiently. This includes using the appropriate delivery options, using the correct output format, and avoiding unnecessary distribution.

By following these steps, a Cognos report can be optimized for performance.


5. What is the purpose of the Query Studio in Cognos?

The purpose of Query Studio in Cognos is to provide users with an easy-to-use interface for creating and running ad hoc queries against a Cognos environment. It allows users to quickly and easily create reports and analyze data without having to write complex SQL queries. Query Studio provides users with a range of features, such as drag-and-drop report building, filtering, sorting, and formatting options, as well as the ability to save and share reports. It also allows users to create charts and graphs to visualize their data. Query Studio is a great tool for business users who need to quickly create reports and analyze data without having to learn complex SQL queries.


6. How do you create a drill-down report in Cognos?

Creating a drill-down report in Cognos is a straightforward process. The first step is to create a query that contains the data you want to use in the report. This query should include the data items you want to use for the drill-down, such as a date range, product category, or geographic region.

Once the query is created, you can create the report. In the report, you will need to add the data items you want to use for the drill-down. You can do this by dragging the data items from the query into the report.

Next, you will need to create the drill-down functionality. To do this, you will need to add a drill-through action to the report. This action will allow the user to click on a data item in the report and be taken to a new report that contains more detailed information about that data item.

Finally, you will need to create the target report that the user will be taken to when they click on the data item. This report should contain the data items that you want to display in more detail.

Once the target report is created, you can link it to the drill-through action in the original report. This will allow the user to click on the data item in the original report and be taken to the target report with more detailed information.

Creating a drill-down report in Cognos is a simple process that can be completed in a few steps. With the right query and target report, you can create a powerful report that allows users to quickly access more detailed information.


7. What is the purpose of the Framework Manager in Cognos?

The Framework Manager is a Cognos tool used to create and manage metadata models for use in Cognos BI reporting. It is used to define the data sources, the relationships between the data sources, and the metadata objects that will be used in the reports. It provides a graphical user interface for creating and managing the metadata models, and it also provides a set of tools for validating and testing the models. The Framework Manager also provides a set of wizards and tools for creating and managing the security settings for the models. The purpose of the Framework Manager is to provide a single, unified interface for creating and managing the metadata models used in Cognos BI reporting. It simplifies the process of creating and managing the metadata models, and it also provides a set of tools for validating and testing the models.


8. How do you create a parameterized report in Cognos?

Creating a parameterized report in Cognos is a straightforward process. The first step is to create a prompt page. This page will contain the parameters that the user will enter to generate the report. The prompt page can be created by selecting the “Create Prompt Page” option from the “Tools” menu.

Once the prompt page is created, the next step is to create the query. This query will be used to retrieve the data from the data source. The query should include the parameters that were created in the prompt page. This can be done by selecting the “Create Query” option from the “Tools” menu.

The third step is to create the report layout. This layout will contain the data that is retrieved from the query. The layout should also include the parameters that were created in the prompt page. This can be done by selecting the “Create Report Layout” option from the “Tools” menu.

The fourth step is to create the report. This report will contain the data that is retrieved from the query and the layout that was created in the previous step. This can be done by selecting the “Create Report” option from the “Tools” menu.

The fifth and final step is to publish the report. This will make the report available to the users. This can be done by selecting the “Publish Report” option from the “Tools” menu.

Once the report is published, the users will be able to enter the parameters in the prompt page and generate the report.


9. How do you create a dashboard in Cognos?

Creating a dashboard in Cognos is a straightforward process. The first step is to open the Cognos Connection portal and select the “Create” option. From there, you can select “Dashboard” from the list of available options.

Once you have selected “Dashboard”, you will be presented with a blank canvas. You can then begin to add components to the dashboard. Components can include charts, tables, and other visualizations. You can also add text, images, and other elements to the dashboard.

To add components to the dashboard, you can either drag and drop them from the “Components” pane or select them from the “Data” pane. The “Data” pane allows you to select data sources and create queries to populate the components.

Once you have added all of the components to the dashboard, you can customize them to your liking. This includes changing the colors, fonts, and other visual elements. You can also add filters and interactivity to the dashboard.

Finally, you can save the dashboard and publish it to the Cognos Connection portal. This will allow other users to view and interact with the dashboard.


10. How do you create a data source connection in Cognos?

Creating a data source connection in Cognos is a straightforward process.

First, open the Cognos Connection portal and select the “Data Source Connections” option from the “Data Source” menu. This will open the “Data Source Connections” page.

Next, click the “Create” button to open the “Create Data Source Connection” dialog box.

In the “Create Data Source Connection” dialog box, select the type of data source you want to connect to. This could be a relational database, a flat file, or an OLAP cube.

Once you have selected the type of data source, you will need to provide the connection details. This will include the server name, database name, user name, and password.

Once you have provided the connection details, click the “Test” button to test the connection. If the connection is successful, click the “OK” button to save the connection.

Finally, you can click the “Refresh” button to view the newly created data source connection in the “Data Source Connections” page.


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