Welcome to the finest collection of Cognos Interview questions. These questions are specially collected for all candidates whether they are fresher or experienced. This article will help you a lot to crack your interviews. This list of questions includes basic questions as well as high-level questions. Just take a look at the questions, if you are going to sit in an interview.
It has many advantages that are described below:
Dynamic cubes are present in-memory Online Analytical Program (OLAP) which loads data from the relational data source.
Aggregate Advisor help in increasing the overall performance.
Cognos Dynamic Cube encourages two types of pre-computed aggregate values and these are
To be considered a durable model, it needs to follow some criteria and these are given below.
Following are the ways to change non-durable models into durable model
It indicates the group of users who have the same rights and required to access the same data. It is the duty of the administrator to build the user class and catalog. This job of the creating and maintaining user class can also be performed by the other users of the organization in their geographical area.
You are also able to build a catalog and you can add the user to it. You can also add the users to the personal copy of a distributed catalog. You will get all the rights from the administrator so you can insert or make changes of user classes
A catalog is a file which contains information such as folders, columns, conditions, etc. on the database tables. The highlighted point here is that it doesn’t contain any data instead it contains metadata definitions and table structures. It has mainly four types:
There are many types of indexes used in Cognos. These are:
The Cognos gateway is a point or starting point where the first request received and then send to the BI server. Cognos gateways used to encrypt the request adds necessary updating like variables or namespaces and then transfers the information to application servers.
The following gateways are supported by Cognos:
It is possible for the users to make data sources with the help of the framework manager within the several Cognos series. It also allows users to add details and logic. A framework manager is a reservoir of information and logic that can be used in a data source in a logical Cognos architecture.
The Framework Manager model comprises of three different layers:
There are different types of securities that can be applied in Framework manager.
Few differences between Cognos Dynamic cube and Transformer/TM1 cube and PowerPlay cube are:
|Cognos Dynamic Cube||Transformer cube||PowerPlay cube|
|It supports caching like in-memory for performance||It also supports in-memory cube technology but with a writeback support||It supports file-based cube technology|
|It is ideal for applications like reading and analytics||It is ideal for applications like writing back, analysis, budgeting, planning etc.||It provides interactive analysis experience for the great number of users|
|It needs the structure like star or snowflake||It does not need the structure like Star or Snowflake||It also does not need the structure like Star or Snowflake|
|It serves in-memory aggregation||It serves file-based with aggregation||It serves aggregation only when demanded.|
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