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Here I have collected some qood interview questions with answers about Informatica that is generally asked. Download Complete Questions in PDF. It will be. Upon completion the Informatica server stores the end value of a variable and is reused when session restarts. Moreover those values that do. Frequently asked Informatica Interview Questions with detailed answers and examples. Tips and Tricks for cracking Informatica interview. Happy Informatica job.
The aggregator will return the last row by default. It stores transitional values which are found in local buffer memory. To access the remote source file you must configure the FTP connection to the host machine before you create the session. It is a file-watch event. If there is no next row for.
This training was very informative and helped a lot in understanding Hadoop. You all do a fantastic job!
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Sign up. Already have an account? Hurry up. Sign Up or Log In using. In this Informatica interview questions list you will learn about the top questions asked in the Informatica job interview. The topics you will learn include difference between a database and data warehouse, Informatica Workflow Manager, mapping parameter vs. Learn Informatica from Intellipaat Informatica Certification course and fast-track your career. Data integration solution Step-by-step solution Project based integration solution Data transformation Good Excellent.
Define Enterprise Data Warehousing? Differentiate between a database, and data warehouse? Become Informatica Certified in 42 hrs. Differentiate between a repository server and a powerhouse?
In Informatica WorkFlow Manager, how many repositories can be created? Write the advantages of partitioning a session? How we can create indexes after completing the load process? With the help of command task at session level we can create indexes after the load procedure. Define sessions in Informatica ETL. In one group how many number of sessions can we have? Differentiate between mapping parameter and mapping variable?
What are the features of complex mapping? How we can identify whether mapping is correct or not without connecting session? Can we use mapping parameter or variables developed in one mapping into any other reusable transformation? What is the use of aggregator cache file? What is lookup transformation? What do you understand by term role playing dimension? How we can access repository reports without SQL or other transformations? Write the types of metadata those stores in repository?
What is code page compatibility? At a time we can validate only one mapping. Hence mapping cannot be validated simultaneously. Define Aggregator transformation? What is Expression transformation? Define filter transformation? Define Joiner transformation? What do you mean by Lookup transformation?
How we can use Union Transformation? Define Incremental Aggregation? The incremental aggregation is done whenever a session is developed for a mapping aggregate. Differentiate between a connected look up and unconnected look up? Define mapplet? A mapplet is a recyclable object that is using mapplet designer.
What is reusable transformation? Define update strategy. Explain the scenario which compels informatica server to reject files? What is surrogate key? Write the prerequisite tasks to achieve the session partition? In informatics server Which files are created during the session rums? Define a session task? Define command task? Explain standalone command task?
This task can be used anywhere in the workflow to run the shell commands. What is pre and post session shell command? What is predefined event? Define user defied event? Define work flow? Write the different tools in workflow manager? Name other tools for scheduling purpose other than workflow manager pmcmd?
It is a process by which multi-dimensional analysis occurs. Name the different types of OLAP? This will give us the top 3 employees earning maximum salary in their respective departments. Factless Fact Table: SCD Type3 Mapping.
It stores one time historical data with current data. Entire mapping will look like this. We are calling the unconnected lookup from one expression transformation. Power center performs incremental aggregation through the mapping and historical cache data to perform new aggregation calculations incrementally. What is the difference between a connected look up and unconnected look up? When the inputs are taken directly from other transformations in the pipeline it is called connected lookup.
While unconnected lookup doesn't take inputs directly from other transformations, but it can be used in any transformations and can be raised as a function using LKP expression.
So it can be said that an unconnected lookup can be called multiple times in mapping. What is a mapplet? A recyclable object that is using mapplet designer is called a mapplet. It permits one to reuse the transformation logic in multitude mappings moreover it also contains set of transformations.
Briefly define reusable transformation? Reusable transformation is used numerous times in mapping. It is different from other mappings which use the transformation since it is stored as a metadata.
The transformations will be nullified in the mappings whenever any change in the reusable transformation is made. What does update strategy mean, and what are the different option of it? Row by row processing is done by informatica.
Every row is inserted in the target table because it is marked as default.
Update strategy is used whenever the row has to be updated or inserted based on some sequence. Moreover the condition must be specified in update strategy for the processed row to be marked as updated or inserted. What is the scenario which compels informatica server to reject files? Moreover it disrupts the database constraint filed in the rows was condensed.
What is surrogate key? Surrogate key is a replacement for the natural prime key. It is a unique identification for each row in the table. It is very beneficial because the natural primary key can change which eventually makes update more difficult. They are always used in form of a digit or integer. What are the prerequisite tasks to achieve the session partition? In order to perform session partition one need to configure the session to partition source data and then installing the Informatica server machine in multifold CPU's.
Which files are created during the session rums by informatics server? During session runs, the files created are namely Errors log, Bad file, Workflow low and session log. Briefly define a session task? It is a chunk of instruction the guides Power center server about how and when to transfer data from sources to targets. What does command task mean? This specific task permits one or more than one shell commands in Unix or DOS in windows to run during the workflow.
What is standalone command task? This task can be used anywhere in the workflow to run the shell commands. What is meant by pre and post session shell command? Command task can be called as the pre or post session shell command for a session task. One can run it as pre session command r post session success command or post session failure command.
What is predefined event? It is a file-watch event. It waits for a specific file to arrive at a specific location.
How can you define user defied event? User defined event can be described as a flow of tasks in the workflow. Events can be created and then raised as need arises.
What is a work flow? Work flow is a bunch of instructions that communicates server about how to implement tasks. What are the different tools in workflow manager? Tell me any other tools for scheduling purpose other than workflow manager pmcmd? A method by which multi-dimensional analysis occurs. What are the different types of OLAP? Give an example? ROLAP eg. What do you mean by worklet?