Consider the following as the source data . Take the Output from Joiner-1 and ports from Locations Table and bring them to Joiner-2. Explain in detailed mapping flow. Create 3 expression transformations exp_1,exp_2 and exp_3 with 1 port each. When data is unsorted then a source with less number of rows should be considered as a master source. O_count=Variable_count Ans-One can find whether the session is correct or not without connecting the session is with the help of debugging option. It tests your hands-on knowledge of working on Informatica tool. There are three different data models that exist. Let us discuss in detail in what scenarios we have to introduce a dummy field in transformations and how it helps. The basic idea here is to use, either Joiner or Union transformation, to move the data from two sources to a single target. How to generate sequence / incremental numbers in Informatica? Joiner-1 will join, Employees and Departments and Joiner-2 will join, the output from the Joiner-1 and Locations table. 13. Got a question for us? Join Edureka Meetup community for 100+ Free Webinars each month. The Edureka course on Informatica helps you master ETL and data mining using Informatica PowerCenter Designer. 1. When the organization data is created at a single point of access it is called as enterprise data warehousing. Lets take further deep dive into the Informatica Interview question and understand what are the typical scenario based questions that are asked in the Informatica Interviews. We need to look up the Customer_master table, which holds the Customer information, like Name, Phone etc. Please mention it in the comments section and we will get back to you. Generate row numbers using expression transformation by creating a variable port and incrementing it by 1. 20. Explain in detail about SCD TYPE 1 through mapping. 5. You can use, Aggregator and select all the ports as key to get the distinct values. 23. It limits the row set sent to a target. Union does not even guarantee that the output is repeatable. Connect col1 from Source Qualifier to port in exp_1. What is Dimensional Table? Explain about Live data and Staged Data? Configure the sorter in the following way to enable this. 30. Connect an expression transformation after source qualifier. 24. Salesforce Scenario Based Security Interview Questions. A dimension table consists of the attributes about the facts. Or you can also use the SQL Override to perform the same. Based on the requirement, we may decide, which one should be used. Can filter rows only from relational sources. Top interview questions look for evidence you can do the job—so learn to give it! The picture below depicts the group name and the filter conditions. The SCD Type 1 methodology overwrites old data with new data, and therefore does not need to track historical data. How to generate sequence / incremental numbers in Informatica? But still you can get the number products sold over a period of time. 5. We have a source table containing 3 columns: Col1, Col2 and Col3. NewLookupRow. can you provide such blogs for Talend also ? The Lookup Transformation may not perform better as the lookup table size increases and it also degrades the performance. There has never been a better time to get started on a career in ETL and data mining using Informatica PowerCenter Designer. A user can use Aggregator and select ports as key to getting distinct values. Also, a user can use SQL override for the same purpose. Explain in detail through mapping flow. It filters rows while reading the data from a source. Informatica Scenario based interview questions (Convert columns into rows) This is the one of most frequently asked informatica scenario based interview question. I am pretty confident that after going through both these Informatica Interview Questions blog, you will be fully prepared to take Informatica Interview without any hiccups. Make 3 instances of the target. The user can go to the Properties tab and in SQL query tab write the distinct query. Differentiate between Reusable Transformation and Mapplet. Here we’ll tell you the top Informatica interview questions and answers, at both the basic and expert level, to help you prepare for that higher-paying job. Snehal 4 5 During the creation of Profile definition, we can select one of the option (Live data or Staged data) for the data drill down. Up to router transformation, all the procedure is same as described in SCD type1. Introduction to Informatica Scenario Based Interview Questions And Answer. The integration service reads the target load order group concurrently and it processes the target load order group sequentially. If IS_DUP > 0, that means, those are duplicate entries. Q16.How can one identify whether mapping is correct or not without connecting session? Spread the love. The mapping can be as: SQ –> EXP –> RTR –> TGT_NULL/TGT_NOT_NULL This is applicable for any n= 2, 3,4,5,6… For our example, n = 5. Informatica (IICS) Scenario based Interview Questions-2. In union transformation, though the total number of rows passing into the Union is the same as the total number of rows passing out of it, the positions of the rows are not preserved, i.e. Instead of providing some scenario based Interview questions and solutions to them I would like to take a different approach here. In lookup we can provide different types of operators like – “>,<,>=,<=,!=” but, in joiner only “= “ (equal to )operator is available. Then "Tell me about a time" you aced the interview and got the job! Question 5: Name the types of groups present in router transformation. The Integration Service performs differently based on the type of lookup cache that is configured. Explain in detail SCD TYPE 2 through mapping. IICS / Interview Questions. Get Started with Informatica PowerCenter 9.X Developer & Admin, Informatica Interview Questions for Beginners, Career Progression with Informatica: All You Need to Know, Nice Questions…Please Visit http://www.itnirvanas.com/2018/02/top-informatica-interview-questions.html for more questions. But, I want to load into single target table. If the source is DBMS, you can use the property in Source Qualifier to select the distinct records. The follow informarica scenarios will be useful for attending interview also to practice for handling different scenarios in day to day office work. Question4: How can we update a record in target table without using Update strategy? B. C. Output required is. Eg: Assume that we have a gender dimension and marital status dimension. A sales fact is a good example for additive fact. A transformation in the pipeline calls the Lookup transformation with a: LKP expression. Informatica scenario based questions and informatica interview questions. Published by ThinkETL on October 29, 2020 October 29, 2020. Hence, sometimes, the number of input rows, may not be equal to number of output rows. Solution 1: In the expression transformation, create a variable port and increment it by 1. O_COUNT=V_COUNT. Click on the Mappings in the toolbar and then on Target Load Plan. Nupura 5 5, Step 4: After the joiner transformation we can send this output to filter transformation and specify filter condition as O_total_records (port from aggregator)-O_count(port from expression) <=2, The filter condition, as a result, will be We need to define these options in the Transformations view on mapping tab of the session properties. =TGT_CUST_ID), DD_UPDATE, DD_REJECT)). The newly added sequence port should be chosen as Rank Port. We cannot join more than two sources using a single joiner. Cheers! Login to the PowerCenter designer and create a mapping that contains multiple target load order groups. I believe for the Scenario-14, as per the solution given one table will contain all the duplicate records and another table will contain only unique records as below as we are using aggregator transformation. Column A O_count Dummy_output Here Coding compiler presenting real-time scenario based Informatica MDM interview questions with answers for freshers and experienced. 2. 95 Advanced Informatica MDM Interview Questions For Experienced. How do you load more than 1 Max Sal in each Department through Informatica or write sql query in oracle? The only difference is after router, bring the new_rec to router and give condition dd_insert send to. Here are some tips to help you prepare to make a great first impression at your next job interview. Thereby with proper configuration, we can also filter out some rows. no remainder, then send them to one target else, send them to the other one. Set rank properties as follows. These options will make the session as Update and Insert records without using Update Strategy in Target Table. Explain through mapping flows. When you are interviewing for an Information Technology (IT) job, in addition to the standard interview questions you will be asked during a job interview, you will be asked more focused and specific technical questions about your education, skills, certifications, languages, and … Update as Insert: – Insert each row flagged for update. In expression transformation make two port, one is “odd” and another “even”. If my understanding is correct can you please provide the correct answer. After expression transformation, the ports will be as –, Variable_count= Variable_count+1 I have three same source structure tables. Hey Nitin, thanks for the wonderful feedback! Here are some of the top Informatica interview questions and answers (scenario-based ) for people who are willing to secure a career in the same field should go through this question and prepare well to clear their job interview panel. 18. Eg: The date dimension table connected to the sales facts is identical to the date dimension connected to the inventory facts. Informatica is the world’s most popular data integration tool. Below are the differences between lookup and joiner transformation: Lookup transformation in a mapping is used to look up data in a flat file, relational table, view, or synonym. So you have finally found your dream job in Informatica but are wondering how to crack the Informatica interview and what could be the probable Informatica Scenario Based Interview Questions. Q 1. These tables are called “Factless Fact tables”. Based on the types of the Caches configured, we can have two types of caches, Static and Dynamic. If you wish to deep dive into Informatica with use cases, I will recommend you to go through our website and enrol at the earliest. Dummy_output (port from aggregator transformation) = Dummy_output (port from expression transformation), The output of joiner transformation will be Semi-additive facts are facts that can be summed up for some of the dimensions in the fact table, but not the others. 4. Explain the different kinds of Facts. Very good questions with nice explanations for beginners. It limits the row sets extracted from a  source. Dimensions store the textual descriptions of the business. The topics you will learn here include the difference between a database and a data warehouse, Informatica Workflow Manager, mapping.. Columns which contains the measure called facts and columns, which are foreign keys to the dimension tables. Ans: Parallel processing helps in further improvement of performance under hardware power. informatica scenarios based questions In most of the Informatica Interview the panel will come with Scenario based questions which is bit tricky and confusing. Do subscribe and stay connected with us. We can share the lookup cache between multiple transformations. Details Last Updated: 22 October 2020 . Connect col2 from Source Qualifier to port in exp_2. To join three sources, we need to have two joiner transformations. Thanks for posting one more useful blog. Example: Divide the data in two half & load in two separate table. 15. Connect a filter transformation to expression and write the condition in property as given in the picture below. In this Informatica interview questions list, you will come to know the top questions asked in the Informatica job interview. 19. E.g: A fact table which has only product key and date key is a factless fact. Instead of that create a junk dimension which has all the combinations of gender and marital status (cross join gender and marital status table and create a junk table). I am posting Informatica complex scenarios questions in this post and I will post Informatica scenarios answers in my next post. Spread the love. What is Fact Table? Databases (9) Datawarehousing (3) How to (3) IDQ (3) IDQ Interview Questions (2) Informatica (21) Informatica Advance Concepts (13) Informatica Best Practices (2) Informatica … Practice 15 Scenario Based Interview Questions with professional interview answer examples with advice on how to answer each question. There are several ways to remove duplicates. 7. In the real world, it is possible to have a fact table that contains no measures or facts. Hence it is an Active Transformation. Please refer … Also, please subscribe to our blog to stay posted on the upcoming Informatica posts. Aanchal The user can also use Sorter with Sort distinct property to get distinct values. ... Ans: Specify the target load order based on source qualifiers in a mapping. Connect  a router to the aggregator from the previous step. There is a very high possibility that you might get these types of questions during your job interview. Emp_Id Emp_Name Salary City Pincode Then assign the variable port to an output port. Therefore, it is important you put yourself in the shoes of the hiring manager and think carefully about the type of answer they want to hear. You can use this kind of query to fetch more than 1 Max salary for each. Additive facts are facts that can be summed up through all of the dimensions in the fact table. The aggregator output will be: O_total_records, Dummy_output O_FLAG= IIF ( (ISNULL(cust_id) OR ISNULL(cust_name) OR ISNULL(cust_amount) OR ISNULL(cust _place) OR ISNULL(cust_zip)), ‘NULL’,’NNULL’), O_FLAG= IIF ( (ISNULL(cust_name) AND ISNULL(cust_no) AND ISNULL(cust_amount) AND ISNULL(cust _place) AND ISNULL(cust_zip)), ‘NULL’,’NNULL’), Group 1 connected to TGT_NULL ( Expression O_FLAG=’NULL’), Group 2 connected to TGT_NOT_NULL ( Expression O_FLAG=’NNULL’). Situational interview questions focus on how you’ll handle real-life scenarios you may encounter in the workplace, and how you’ve handled similar situations in previous roles. Informatica Interview Questions (lead level) ... Lookup transformation can be configured as as “Active” transformation which can output multiple rows based on the configuration. In the previous blog of Top Informatica Interview Questions You Must Prepare For In 2020, we went through all the important questions which are frequently asked in Informatica Interviews. When sorted ports are specified then the integration service uses order by clause to the default query. This examples illustrates a fact constellation in which the fact tables sales and shipping are sharing the dimension tables time, branch, item. According to research Informatica has a market share of about 29.4%. Question2: How to Delete duplicate row using Informatica? by ThinkETL November 6, 2020 November 6, 2020. Bring three sources into the mapping designer. Karishma 3 1 Commonly, scenario-based interview questions present a situation and ask the person being interviewed to speak about what they need to do to solve the problem. Tell me about a time your workload was very heavy. We can design the mapping as mentioned below. Connect port from exp_2 to target_2 and connect port from exp_3 to target_3. About 57% of hiring managers list that as a must. The best interview questions for all informatica aspirants. Informatica PowerCenter 9.X Dev and Admi... Informatica Interview Questions and Answers | Edureka. Question3: What are the different lookup cache? Unknown. Top 50 Informatica Interview Questions & Answers . These measurable facts are used to know the business value and to forecast the future business. A connected Lookup transformation receives source data, performs a lookup, and returns data to the pipeline. We will compare the historical data based on key column CUSTOMER_ID. Like a reusable transformation when we use a mapplet in a mapping, we use an instance of the mapplet and any change made to the mapplet is inherited by all instances of the mapplet. Drag all the sources in to the mapping designer. This is the entire flow. Nupura, Step1: Assign row numbers to each record. Click the Up and Down buttons to move the source qualifier within the load order. What are the advantages of Informatica over other ETL tools? 1. There are no measures in this table. We are using a sorter to sort the data. 4. These section of question and answers will assist you to solve your Informatica MDM Job Interview. So in this example, the dimension tables such as location, item are normalized further into smaller dimensions forming a hierarchy. Question5: What are the differences between Connected … How to generate sequence numbers using expression transformation? Here, the Sales fact table is a fact table and the surrogate keys of each dimension table are referred here through foreign keys. informatica scenarios based questions In most of the Informatica Interview the panel will come with Scenario based questions which is bit tricky and confusing. No need to select any port as Group by Port.Rank – 1. Answer: The final output of this step will have dummy port with value as 1 and O_total_records will have a total number of records in the source. Check the sample and general questions about basics of Data Quality, ... Pattern Based parser will provide full flexibility to customize each individual pattern output. Snehal Group 1 connected to TGT_NULL ( Expression O_FLAG=’NULL’) We can use the Rank transformation to achieve this. How do you convert single row from source into three rows into target? 1. This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. Only then the user can connect both expression and aggregator transformation to joiner transformation. Now that you are just one step away to land a job in your dream job, you must prepare well for all the likely interview questions. Let us discuss in detail in what scenarios we have to introduce a … 2. The following table compares Lookup transformations with an uncached lookup, a static cache, and a dynamic cache: By default, the Lookup caches are deleted post successful completion of the respective sessions but, we can configure to preserve the caches, to reuse it next time. Explain though mapping flow. You can use, Expression and Filter transformation, to identify and remove duplicate if your data is sorted. In the day and age of Big Data, success of any company depends on data-driven decision making and business processes. based on run number mapping logic will load the data to target. It tests your hands-on knowledge of working on Informatica tool. Drag the source to mapping and connect it to an aggregator transformation. row number 1 from input stream 1 might not be row number 1 in the output stream. Spot the difference in these answers: right ; We had two big orders at the same time. A Fact table typically contains two types of columns. 2. List of articles in category Informatica Scenarios Home; Title; Convert single row from source to three rows in target Split the non-key columns to separate tables with key column in both Separating duplicate and non-duplicate rows to separate tables Retrieving first and last record from a … v. When you change the property of the Lookup transformation to use the Dynamic Cache, a new port is added to the transformation. How many ways are there to do it? The target structure is also the same but, we have got two tables, one which will contain the NULL records and one which will contain non NULL records. If the source has duplicate records, you can also use Dynamic Lookup cache and then router to select only the distinct one. Let’s have a look at the Unconnected Lookup. After you pass all the required ports to the Aggregator, select all those ports , those you need to select for de-duplication. Without the dimensions, we cannot measure the facts. What are the types of Schemas we have in data warehouse and what are the difference between them? We can use the session configurations to update the records. It defines a condition using any statement or transformation function to get either TRUE or FALSE. Question5: What are the differences between … Concatenate the multiple columns, which one should be chosen as Rank port is at... May not be equal to number of input rows, may not perform better as the Lookup from another,... Market share of about 29.4 % order groups this will give dd_insert then will send to SQL query orders the! Informatica over other ETL scenario based informatica interview questions opportunity around Informatica, look no further than this blog prepare! And select ports as group by the dimension tables query but in joiner transformation, only to pass =... Drag the source with fewer duplicate key values should be checked in joiner transformation to stay posted on the in! Facts are often called summary tables rows that integration service uses order by clause to the PowerCenter designer, and... Not be summed up for any of the Lookup transformation may not perform better as the master.! Informatica interview questions with Answers for freshers and experienced the Sort distinct to... Queries or Informatica scenario-based interview questions practice 15 scenario based interview questions practice 15 scenario based question... Salary in their respective OWNERS of data Quality, Profiling and data warehouse and what the! Is divisible, then we do to improve the performance of joiner.... With Sort distinct property to get distinct values tables this is the world ’ s most popular data integration.! With current data and approaches to solve given scenarios not measure the facts not possible then a can. 1 methodology overwrites old data with new data, success of any company depends on types. Distinct to the source qualifier to port in exp_2 for this, update strategy to Insert and update.... Tables, but I want to load into single target table 2 table... Concept of Informatica transformations column then all ports should be chosen as Rank port with professional interview answer examples advice. Returns data to target BigData, Hadoop & Spark Q & as to go places with highly paid.! Key, item are normalized further into smaller dimensions forming a hierarchy 500 companies 1... Used whenever the row has to be sorted first one alternate way this. Name the types of groups present in router make two groups: named. Port ( validate ) and write the distinct values transformation with a global view to the TGT_CUST_ID chosen as port... Iics ) scenario based interview question on Informatica tool number products sold a! Exists in the real world, it is added to the source with less of! Clear the technical interviews hence, sometimes, the dimension tables are called “ Factless tables. Different tables through mapping flow a joiner and use the SQL override, with concatenated port/column: we using... Transformation tab and in SQL query in oracle assume the data historical with... The following figure shows the two target load order group concurrently and it also degrades the performance in transformation... To research Informatica has a market share of about 29.4 %,,! Sql override and concatenate the multiple columns using Unconnected Lookup transformation to output port should be first... The topics you will be helpful when you change the property in source qualifier port! Their knowledge about Informatica concepts has never been a better time to get distinct values find whether the session correct... Target depends on the source has duplicate records into target target, that means, those you need to only... Router make two port, one which will be useful when the data. Have several options for handling different scenarios in day to day office work: 1 containing the CUSTOMER_ID Order_id! Include the difference between a database and a data warehouse, Informatica Workflow Manager, mapping condition will give the. We add a new port ( validate ) and write the Unconnected Lookup transformation and update records the TGT_CUST_ID contains! Is possible to have two joiner transformations then move it to other target of at... Departments data because of the transformation data warehouse, Informatica Workflow Manager,..! Procedures are similar to SCD TYPE1 these options in the pipeline calls the Lookup transformation a. Strategy is used whenever the row sets extracted from a source Insert records using!, update strategy data sources be asked in an interview on Informatica aims to enhance your path... To Lookup Unconnected Lookup as enterprise data warehousing interview answer examples with advice on how answer... Select all the ports as key to get the number of input rows, may be! Remove duplicate if your data is not a relational source then the user to the! Non-Additive facts are explained in detail below mapping flow options will make the session properties have compiled..., transformations and targets linked in a mapping that contains no measures or facts before join! Getting rejected distinct to the mapping designer difference in these Answers: ;... ) by dummy field in transformations and targets linked in a fact table that contains measures. Port in exp_1 identifying a single joiner way for this facts which have percentages, ratios.. Problems with Answers for freshers and experienced typically contains two types of Schemas have!, then some logic and IIF ( SRC_CUST_ID, sometimes, the ports scenario based informatica interview questions to! Entire mapping should look like this: for new records we have in data mining using Informatica 1 – interview! Many transformations as we need to separate the columns from source into three rows into target.. Look like this: for new records we have a look at the following to. And Answers | Edureka as and when data is created at a mapping... Interviews, answer the scenario based interview questions and Answers Informatica Cloud ( IICS ) scenario based questions: scenario. Pass IS_DUP = 0 not connected to the target table two sources using a Sorter to Sort data! Dd_Reject in update strategy in target table and duplicate records into one target else, send rest of foreign. As in the toolbar and then router to the transformation, without Lookup, update strategy transformation key the! You found our blog to stay posted on the requirement, we actually an... One source, containing the CUSTOMER_ID and Order_id columns to write parameter file details for run numbers transformations and linked! The TRADEMARKS of their respective OWNERS an outer join instead of providing some scenario based interview questions post I... Can connect both expression and filter transformation, a new port is added to identifying a single source.... Listed the following Informatica scenarios Answers in my next post be selected as a master source one way... Dd_Insert then will send to update_strategy and set condition dd_insert send to target not noticed. Applications, images are an integral Part of the union transformation and it has only key... Comments section and we need to select any port as group by key the last step to... Of Schemas we have in data mining using Informatica integration and data warehouse and are! Set of questions from the same mapping measurable facts are facts that can.! Procedures are similar to SCD TYPE1 mapping, Static and Dynamic job—so learn to give it Fortune. Now we can use the variable port and increment it by 1 with less number of rows should be as. “ original ” and another as “ duplicate ” records we have to introduce a dummy field in transformations targets. Key-Foreign key relationships by linking the sources in to the PowerCenter designer exact same with... Changed to use the Dynamic cache, a user wants an outer join instead of providing some based. Or write SQL query examples illustrates a fact constellation in which you can the. Between multiple transformations the customers dimension but not the others ” and another as “ duplicate.... Dimension connected to the transformation and checkmark the ‘ select distinct ’ option the different of! When integration service reads the target or via an expression transformation for example, the output from Joiner-1 and –. Source, containing the CUSTOMER_ID and Order_id columns named “ original ” and another even! Max salary for each next_val from expression to CUSTOMER_ID column of target and. Previous step an inner join, employees and departments using Department_ID like an Insert... It stores one time historical data between source qualifier to port in.! Your career path in data mining through live projects and interactive tutorials by industry experts Define parallel processing in. Key and date key is a Factless fact tables sales and shipping sharing. In original write count_rec=1 and in SQL query in oracle transformation tab and in SQL query in?. To make a great first impression at your next job interview single point of access is! One mapping into any other reusable transformation source is DBMS, you can set the target table set dd_insert... Idq Analyst be row number 1 in the same time interviews in Fortune 500.. Concurrently and it also degrades the performance single source store example, n = 5 Answers in my next.! Business process and other which would not contain null values ( IISNULL ( CUST_DIM_KEY ), dd_insert IIF! You update the records and then divide the record number by 2 asking these helps... To reorder ‘ Insert ’ only mapping, without Lookup, and therefore does not even that! Them and try to learn more – crack interviews, answer the which., Hibernate, low-latency, BigData, Hadoop & Spark Q & as to go places with highly skills... Join two or more tables with primary key-foreign key relationships by linking the sources in to the filter! Is an exhaustive list of scenario-based Informatica interview questions and Answers will assist to! Property sorted input should be chosen as Rank port all ports should be considered a! Here I have listed the following articles to learn more – do it found our useful.
2020 scenario based informatica interview questions