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| OA Framework Interview Questions | | Print | |
| Written by Anil Passi | |
| Friday, 29 February 2008 | |
|
More and more jobs demand OA Framework skillsets these days. In fact it is safe to say that you would need OA Framework development experience to have an edge as an Oracle Applications Consultant. Indeed OA Framework will become a thing of past with Fusion, however OA Framework will be used for next at least 5 to maximum 10 years The concepts of OAF, specifically BC4J, can be carried forward to ADF. I am listing hereby the questions that I would ask for an OA Framework Interview. As a thumb rule, interview questions should always be based on basic & practical concepts. Please remember that, as an Oracle Apps Consultant, more often that not, you will be required to do extensions rather than pure development. Indeed, some component of extensions will call for development of new pages. These questions will lay more emphasis on OA Extensions, which is what OAF Consultants will most likely be working on. One last piece of advice, the purpose of these questions is not only to help you with interviews, but in reality it is to help you clear your practical concepts on OA Framework. Question 1 You wish to hide a bean/field programmatically, where will you do that? a. In controller b. In Application Module c. In Entity Object d. In View Object Answer:- In controller[Although SPEL with limited usage can also be considered] The remainder questions are best left interactive. Please quote the Question Number in comments when putting your thoughts on any individual question. Question 2 Within which method of Controller will you hide that bean/field/button/region programmatically? 1. processRequest 2. processFormRequest 3. Both processRequest and processFormRequest Question 3 Tell me the practical steps for extension of a view object, starting from $JAVA_TOP to jDeveloper Question 4 Please tell me the scenario in which extension to View Object is not upgrade safe? Question 5 In Oracle Forms, we have WHEN-VALIDATE-RECORD? What will be the equivalent to that in OAFramework? Question 6 How do you disable all the OA Framework personalizations in eBusiness Suite Question 7 How do you disable all the OA Framework extensions in eBusiness Suite Question 8 You are working on two projects, both involve OA Framework. One instance is on 11.5.10-Rollup2 Other instance is on R12-Rollup4 Can you setup up development environment for both these instances on your PC/Laptop? If yes, then please explain how. Question 9 How do you enable a pop-up screen in OA Framework [without using javaScript]? Question 10 Can you add new columns to an Advanced Table region/section using personalization? Question 11 Tell me one scenario in which you would have to extend Application Module? Question 12 Can you extend every possible Application Module? Question 13 A slightly advanced question will be…Why can’t Root AM be extended? Question 14 How would you know whether the AM that you are trying to extend is the RootAM? Question 15 Which two types of extension are the most common ? Question 16 Why do you think multiple AM’s are required in a Transaction/Transactions? Give me an example where this is applicable. Question 17 On any given OA Framework page, what is the sequence in which these methods will fire in a Controller? processFormData processRequest processFormRequest Question 18 A user clicks on a Submit button on a page. The fields on this page are attached to View Object attributes, which in turn are attached to Entity Object attributes. An exception is raised from validation EO due to data validation errors. Tell me, which methods in controller will be fired when a Submit button is clicked on that page [assuming validations in EO throw an exception] Question 18 What are the steps to embed a custom region into a standard OA Framework page? Question 19 You have two OA Framework pages, page A and page B. Depending upon the value of a department selected in PageA, you wish to restrict the LOV of Approvers in page B. How will you do this? Why would would not prefer to extend the viewObject of LOV? Question 20 What are different methodologies that you can consider to default value into a field? Question 21 What are different mechanisms of debugging in OA Framework. Question 22 From one controller, I wish to execute the code in other controller. Is it possible, and if yes, then how? Question 23 I wish to know the SQL statement of a View Object being used by a page. What is the quickest way to find out? Question 24 How would you deploy the BC4J extensions to the server? Question 25 I have extended the View Object and now I wish to locally test that extension in jDeveloper? Is that possible without loading the jpx file into the database? Question 26 When you run SQL Trace for an OA Framework session[using diagnostics], why are multiple *.trc files created on the database server? Question 27 How do you load XML page developed using jDeveloper? Question 28 Tell me two different methods you can use to get the XML Files of standard OA Framework pages. Question 29 Tell me two different methods you can use to get the XML definitions for standard OA Framework pages? Question 30 Please explain the different types of tasks you can do using Functional Administrator responsibility Question 31 Lets say a PageA has been personalized in Development and UAT environments. Is it possible to merge the personalizations done to same page in two different environments, using Functional Administrator? Question 32 What is the sequence of Personalizations override? Responsibility Level Site Level Function Level Organization Level User Level Question 33 Where is dbc file located on the server? Is dbc file used by jDeveloper at RunTime or DesignTime? Question 34 By setting profile option “Disable Self Service Person%”, not only the personalization, but also the OA Framework extensions get disabled. Please explain why? Question 35 How do you create User Level Personalizations? Please explain the steps Question 36 Off the following levels in Personalizations, i.e. Responsibility Level, Site Level and Function level, which level has highest and least priority? All above questions are very basic and practical in nature. Any person applying for an OAF job should try to understand the concepts behind each of these questions. Once you know the answer to these, I am confident that you can undertake a job of a Technical OA Framework Consultant. PS- I have purposely not included any tricky/complicated questions, as complicated things can be learnt on the job itself Comments
(12)
Question 2
Within which method of Controller will you hide that bean/field/button/region programmatically? 1. processRequest 2. processFormRequest 3. Both processRequest and processFormRequest Answer is 1. - processRequest OA Framework give error if you change bean property in processformrequest
Question- Please tell me the scenario in which extension to View Object is not upgrade safe?
Answer - If the original view object was created in expert mode, then you will have to copy the Original VO Query and then you will paste that SQL Stmt/Query into the extended View Object. Now, if Oracle were to change the original SQL Statement [against original VO], then those changes will not be reflected in extended View Object. Is there any solution? Well, yes, depends on what you wish to achieve via personalization. If you simply wish to alter the where clause dynamically, then you might as well do that by extending the controller. Note:- When extending the CO, we are assuming that at least the selected table aliases from the Original SQL Statement will not be removed by Oracle's patches. Thanks, Anil Passi
Question-In Oracle Forms, we have WHEN-VALIDATE-RECORD? What will be the equivalent to that in OAFramework?
Answer - Use a method named validateEntity() within the Entity Object.
Qns - How do you disable all the OA Framework personalizations in eBusiness Suite
Ans- All the personalizations done to the system can be disabled by simply setting a profile option to Yes at site level. Name of this profile option is something like Disable%Self%Service%Personal% Note:- You can de-activate personalizations against individual pages selectively, by clicking on button "Manage Personalizations". You may need to give yourself access to responsibility named "Functional Administrator", so that you can disable personalizations selectively.
Question - How do you disable all the OA Framework Extensions in eBusiness Suite
Answer - The answer to this question is same as that for Question 6. Extensions are stored in the MDS Layer. Hence if you disble all personalizations, then all the OA Framework extensions will also be removed temporarily, while that profile remains set to Yes. This is very handy in case you wish to bring your product back to Vanilla state.
Hi Anil,
I have a doubt with Question 22 Will instantiating another controller in the controller and using its methods suffice ? Question 9 : I have always used JavaScript to show a popup screen. Can you explain how can we do it using straight java code. Question 14 : can you tell us how can we know the RootAM. Question 16 : And also we have been using one root AM to handle the transactions of a whole OA page. Can you explain the scenario where we use multiple AMs. Thank you for all your help, Srikanth  written by Rohit.Monga , March 12, 2008
Hi Anil,
How to set responsibility context in OAF like fnd_global.APPS_INITIALIZE is used in database. We are trying to open a OA page from a URL in notification. On opeining that page system ask for "Switch Responsibility", but we want to set Manager Self service responsibility for that page. We have tried setting &#RESP_KEY &#APP_SHORT_NAME parameters, but we are getting null pointer error there. Please suggest a solution for the same. Thanks a ton. Rohit.
Hi Rohit,
Your approach is correct, i.e. to set hash attributes, but it appears this functionality in Oracle has bugs. You should feel free to raise an SR Now some background ---------------------- Re-Execution of fnd_global.apps_initialize will not solve your problem. Reason benig that fnd_global.apps_initialize is executed at the very early stage. OAF calls fnd_global.apps_initialize to create WebAppsContext for your jsp session. Even if you re-execute fnd_global.apps_initialize via jdbc lets say from either Root AM or processRequest in CO, it will not work, because when user takes a submit action -then a new Connection might be requested from the pool. This new DB connection object will contain the context of old responsibility. OAF massages the new connection with WebAppsContext. Behind the scenes, Oracle uses a package named FND_SESSION_MANAGEMENT. If you want to experiment some unrecommended trials, then call below plsql from notification region. fnd_session_management.updatesessioncontext ( p_function_name , p_function_id , p_application_id , p_responsibility_id , p_security_group_id , p_session_id => , p_transaction_id ); This will mean that you manipulate the page context at runtime, and is subject to experimentation, and is not recommended. Cheers, Anil Passi
Hi Anil,
I would like to share that I have achived the results of switching the responsibility context by using pageContext.changeResponsibility and this is working fine. I am really greatful to you for providing a direction for my issue. Thanks, Rohit
Hi Rohit,
Very well done, thanks for sharing the solution with all. Thanks, Anil Passi
Anil
can you post answers for questions 8 to 16. thanks You must be logged in to a comment. Please register if you do not have an account yet.
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Best Regards
Bhupender Kumar