Cognos is an IBM product, which works on BI (business intelligence) and performance management. This platform offers various BI functionalities, such as reports, scorecards, dashboards, analysis and many more. A number of organizations have adopted this tool for its BI capabilities. The increasing adoption of this platform has led to a growing demand for skilled professionals in the field of business intelligence.
For those who have mastered Cognos, there are promising career opportunities in Business Intelligence. To help you grab this opportunity, we have included the most asked Cognos interview questions and answers (for the professionals of all levels) in this article. It is divided into three different segments based on the skills and experience level. Before discussing these questions and answers, let's take a quick overview of Cognos.
It is a BI tool that was first introduced by Alan Rushforth and Peter Glenister in 1969. IBM acquired it on 31st January, 2008. And it has now become a preferable platform for various organizations and individuals. This desire is the result of its robust functionalities, including event monitoring, data analysis, data mining, and metrics solutions.
It has a unique approach to handle and analyze data. It combines robust reporting capabilities with advanced analytics features. This tool also features AI-powered automation that helps to unlock maximum potential of data. Along with that its natural language assistant feature demonstrates modern data visualizations. So, these three are the main highlighted functions of this platform.
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Coming to the Cognos interview questions, we have divided this blog into three parts. Each section will provide different questions based on the different aspects. We have followed this approach to make it suitable for each level of candidate.
This first section covers the top Cognos admin interview questions. While being specific for the admin role, these questions are important for all candidates.
Metric store database is a central repository that works as a bridge between business applications and data warehouses. It allows users to leverage databases for creating or defining business metrics. These metrics can be used repeatedly for BI, automation, workflows and analytics. It benefits the data teams by removing the requirement of creating individual datasets.
There are two different procedures for creating a cube using this platform. You can use tools like Cognos Transformer and Planning Analytics Workspaces. Alternatively, you can use IBM Cognos administration, which includes few steps -
A file that contains the information of database locations is called catalog. It indicates the volume where the required database is located. It has five kinds of catalog, which are -
Cognos PowerHouse is a fourth-generation programming language. It provides a highly productive development environment that enables users to swiftly generate data-driven business solutions. It can be server, client, web-based or terminal-based access. This language has achieved a huge popularity worldwide among the businesses with its performance, reliability, flexibility and productivity.
It provides three types of security features, including-
This platform can support various datastores. Each of them are used for different applications.
The Cognos connection page generally have three types of components, such as -
DTM is basically used for converting the reader's data and transiting it from transformation to transformation. The transformation caches are utilized based on the requirements.
Following are the uses of dynamic cube cycles -
Report item is a feature of this platform that helps in performance management. This platform provides features that can help address real-time challenges in business intelligence. It provides a reporting feature like Tivoli ordinary reporting feature. These items are included in the reports from the package. This report item materializes as a column in an index of columns, rows and words on the crosstab section.
Here is the difference between two-
Related Article- Cognos Tutorial- A Guide For Beginners
In some instances, the interviewer may also ask Cognos framework manager interview questions to candidates. This segment will prepare candidates to answer these types of questions.
It is a tool of this platform that helps to create data models for metadata. With this tool, users can easily design and maintain both physical and logical data source structures. Further, these databases are used for reporting and analysis. Framework manager offers a simple way to build query subjects, define data relationships and create business layers. It shows the information in a user-friendly approach.
It is a web tool that allows businesses to perform ad hoc analysis and view data interactively. It offers features for multidimensional analysis, such as pivoting, drilling down and filtration of data. Analysis studio is designed in a way that users without any technical knowledge can also quickly analyze the data. This makes it a most suitable tool for decision making and business analysis.
Analysis studio provide various kinds of data items, including -
It is a column or suite of columns in the dimension table of the framework manager that works as distinctive recognition of rows. It allows query engines to optimize execution plans that helps to improve their performance. After defining the determinants, the framework manager finds which column uniquely identifies a row. Then it uses this information to create effective SQL queries.
The framework management model consists of three layers -
The IBM Integration Bus archives the orchestration with message flow. Following activities are tied together to perform this operation.
Generally message flows are distributed with IBM predictive maintenance and customized with their Integration Bus. These flows can be arranged in the following applications -
Following are the differences between Cognos SQL and Native SQL -
There are three types of levels in the Framework Manager Model, including -
The framework manager has three types of security for this purpose -
Determinants are essential in the following situations -
This section includes the top cognos interview questions for experienced aspirants. These questions and answers will surely help professionals to excel in this interview.
Model Advisor is an important tool of this platform. It is mostly used to detect ordinary modeling errors, such as incorrect determinants, potential join path conflicts and cardinality issues. This tool is easily configurable that enables users to link it directly with problem areas. With this approach, users can evaluate those areas and find potential errors.
Regular dimensions are usually created by model and data query subjects. These can be used for the following operations -
It is a simple procedure with few steps -
Event Studio is a component of this platform, which enables users to build and manage new agents. These agents are used for event monitoring and agent triggering according to predefined conditions. With this component, users can continuously manage business metrics and take instant actions based on certain events. It simplifies the approach for managing KPIs and ensures response time of crucial business events.
It can be done using the following-
Email notifications can be easily integrated to Cognos with its configuration tool.
Before designing a financial dashboard in this web-based business intelligence (BI) tool, it is important to identify core financial metrics and integrate data sources. After this procedure, this dashboard can be designed with sections and visualizations (tables, charts). Applying some conditional formatting can help to update and improve performance of the dashboard via definite user permission. Frequently updating data sources and dashboard content can help to reflect latest financial performance and adapt business requirements.
The loop joins of the model are typically the reason for unexpected behavior. Star schema loop joins are not a part of these. Once cardinality clearly detects dimensions and facts, this platform automatically removes loop joins caused by star schema data.
The inaccurate defined subject queries are the main reason for loop joins. These joins are identified based on several factors. These factors are relationship location, number of segments in paths, all else being equal, etc. It creates confusion for the users, so it is important to clearly identify the join paths.
It is a table of snowflake or star schema that stores measures and facts of business like sales, profits and costs. It also includes some foreign keys for the dimension table. These keys are typically related to each data row of the fact table with corresponding levels and dimensions. Logical fact tables are supported by Cubing Services that help to visualize them in a cube model.
A database consists of various tables and their relationships is collectively called database schema. Although there are several schema designs available, these databases are used in historical queries only. These are always set up with dimensional ones. Considering the dimensional schemas, there are several practical and historical reasons for popularity and growth. Yet, it depends on two main abilities -
Bursting in Cognos allows personalized distribution of a report to multiple recipients based on a key value. It works by:
This section includes the top Cognos developer interview questions and answers you should know to crack these types of interviews.
The major role of Cognos Developer is to design, develop, test, and deploy reports using Cognos BI tools. A developer work with Framework Manager to build metadata models, creating dashboards, setting up prompts and filters, and optimizing report performance.
To create a prompt:
To implement drill-through:
Determinants are used to define the unique identification of rows in a query subject. It can also enforce correct aggregation and join behavior. They are mostly used for preventing double-counting and ensuring accurate data retrieval, especially with complex data models involving multiple-grain data.
Project-level scrubbing is a method of data cleansing. It involves identifying and correcting or removing erroneous, duplicate or incomplete data within a project's data sources. Its purpose is to improve data quality, consistency and reliability before data is used for reporting or analysis.
To generate an IQD file, you need to create a "Report Net IQD Data" publish definition within Framework Manager. This definition specifies the query subjects and items to be included. After creating and configuring it, you can then publish the package, which will generate the IQD file in the specified location.
This section includes the most commonly asked Cognos interview questions and answers. These can be asked to anyone irrespective of the role they are going for.
The three types of query subjects in Cognos are:
A Cognos Administrator has the following responsibilities:
The phases are:
The types of tabular filters are:
There are various methods of generating IQD file from framework manager like:
Cognos is one of the most used business intelligence tools among several MNCs. It has created a number of new job opportunities for individuals like you. In this blog, we have discussed top Cognos interview questions and answers. With this content anyone, with or without experience of this field, can start their career. It can be the best guide to prepare for your next interview.
Ans: This web-based business intelligence and analytics tool designed to help organizations understand their data, analyze trends and make data-driven decisions.
Ans: This BI tool supports three types of structured query language including Cognos SQL, pass-through SQL and native SQL.
Ans: Crosstab reports, list reports and charts are the three general categories of reporting in Cognos.
Basic data analysis, SQL knowledge, report building skills and an understanding of business intelligence concepts are required.
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