What�re the different types of reference?

Hello there:
I was asked a question during the interview:
What�re the different types of reference?
They meant sth like weak reference... anyone can give a more detailed explaination?
Also someone can talk a little bit about the memory leak in Java? IWhen will it happen? One senario on my mind is that: an array filled with the references of a class, when the program is done with the array, it doesn't apply removeall on the array. Will it cause memory leak?
Thanks a lot,
Sway

They meant sth like weak reference... anyone can give
a more detailed explaination?[url http://java.sun.com/j2se/1.5.0/docs/api/java/lang/ref/package-summary.html]Read, and ye shall learn.

Similar Messages

  • What are the different types of analytic techniques possible in SAP HANA with the examples?

    Hello Gurus,
    Please provide the information on what are the different types of Analytic techniques possible in SAP HANA with examples.
    I would want to know in category of Predictive analysis ,Advance statistical analysis ,segmentation analysis ,data reduction techniques and forecast techniques
    Which Analytic techniques are possible in SAP HANA?
    Thanks and Regards
    Sushma C Narasimhamurthy

    Hi Sushma,
    You can download the user guide here:
    http://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CFcQFjAB&url=http%3A%2F%2Fhelp.sap.com%2Fbusinessobject%2Fproduct_guides%2FSBOpa10%2Fen%2Fpa_user_en.pdf&ei=NMgHUOOtIcSziQfqupyeBA&usg=AFQjCNG10eovyZvNOJneT-l6J7fk0KMQ1Q&sig2=l56CSxtyr_heE1WlhfTdZQ
    It has a list of the algorithms, which are pretty disappointing, I must say. No Random Forests? No ensembling methods? Given that it's using R algorithms, I must say this is a missed opportunity to beat products like SPSS and SAS at their own game. If SAP were to include this functionality, they would be the only BI vendor capable of having a serious predictive tool integrated with the rest of the platform.... but this looks pretty weak.
    I can only hope a later release will remedy this - or maybe the SDK will allow me to create what I need.
    As things stand, I could built a random forest using this tool, but I would have to use a lot of hardcoded SQL to make it happen. And if I wanted to go down that road, I could use the algorithms that come with the Microsoft/Oracle software.
    Please let me be wrong........

  • What are the different types of bind that we can use to configure COREid?

    Hi
    What are the different types of LDAP bind that we can use to configure COREid?
    Thanks for your input.

    (http://download-west.oracle.com/docs/cd/B28196_01/idmanage.1014/b25343/idconfig.htm#BABGAECB)
    7.5.2 Creating an LDAP Directory Server Profile

  • What are the different types of Wage types for Indian Payroll...??

    Dear Frnds,
    What are the different types of Wage types for Indian Payroll that we have to configure it...?? and please list wage types that we have to configure it for different types of TAX and Allowances in India payroll.
    And also please list Info types numbers for different types of TAX and Allowances.
    Many thanks in advance.
    Regards
    Ahmed.

    for the list of the wage types you can check V_512W_D for country grouping 40 Inida
    for Tax related info please search the forum or search google you will get lot of inputs

  • What are the different types of parameters available in function builder an

    What are the different types of parameters available in function builder and where do we use them.

    The different type of parameters available in FM are
    Import - They are used to pass the values to the function module.
    Export- They are used by FM to pass the result back to the calling program.
    Changing - The variables are passed to the FM and can be changed during the FM processing.
    Tables - Internal tables can be passed to the FM (it works similar to changing parameter).

  • What are the different type of transformations in ODI?

    Hi all,
    I'm new to ODI tool.My source is Flat files and target is Teradata.Please tell me what are the knowledge modules i have to use?
    In ODI tool what are the different types of transformatios are there.Advance thanks
    Regards
    suresh

    Hi,
    Check the following KMs
    LKM File to Teradata
    IKM File to Teradata
    ODI have some basic transformation like Joiner, Filter etc .
    You can refer the User Guide for details about these transformations .
    Thanks,
    Sutirtha

  • What are the different type of Granularity

    what are the different type of Granularity
    a.     Transaction
    b.     Periodic Snapshot
    c.     Accumulating Snapshot
    d.     None of the above

    Hi,
    Check the following KMs
    LKM File to Teradata
    IKM File to Teradata
    ODI have some basic transformation like Joiner, Filter etc .
    You can refer the User Guide for details about these transformations .
    Thanks,
    Sutirtha

  • What r the different types item categ r thre ? what is the purposes of its?

    what r the different types item categ r thre ? what is the purposes of its?

    hi Deva,
    Go to T.code VOV4..>ITEM CATAGORY ASSIGNMENT
    sales doc. type+item catagory group Item usagehigher level of item catagory= Item catagory
    For Item catagory details
    Go to T.code VOV7
    Types of Item Catagory:
    AFN inquiry
    AGN quoation
    TAN standred order
    TAN rush order
    BVN cash sale
    Tann Free Goods
    Tas Third Party Order
    REN Return order
    G2N credit Memo Request
    L2n Dedit Memo Request
    TAQ bill of material (structure Above Material)
    TAP bill of matrial  (structure Below Material)
    PVN Item proposal
    NLC Interco stock trans item
    KLN contract
    Purpose of Item Catagory:
    Item catagory determines how the item will act during order processing.It Affects Schedule line catagory also.
    Item Catagory+MRP Type...>Schedule line catagory
    Reward points pls
    MCM

  • What r the different types special sales document types r there in  sd?

    what r the different types special sales document types r there in  sd? give me some brief notes of each one?

    This link will help you
    http://help.sap.com/saphelp_46c/helpdata/en/70/a7853478616434e10000009b38f83b/frameset.htm
    http://help.sap.com/saphelp_46c/helpdata/en/70/a7853478616434e10000009b38f83b/frameset.htm

  • What are the different types of tables in oracle --plz help

    I want to know the different types of tables in orcle...Please help me

    There are seven types of tables in Oracle.
    1.Heap organized tables
    2.Index organized tables
    3.Index clustered tables
    4.Hash clustered tables
    5.Nested tables
    6.Global temporary tables
    7.Object tables
    Source:http://www.adp-gmbh.ch/ora/concepts/tables.html
    But if you are asking table types in the uses senses then they are n types :
    1.Stage tables
    2.Operational tables
    3.Functional tables
    4.Disposition tables
    5.Archive tables
    6.Other tables
    Source:http://www.databasejournal.com/features/oracle/article.php/3616476/Types-of-Tables-in-Oracle.htm
    And yes of course, the complete detail can be found in documentation.
    HTH
    Girish Sharma

  • What are the different types of exits available?

    hi all,
    Can any explain different types of exits ? user exit ? menu exit etc?
    can anyone explain me each exit with an real time scenario
    regds
    hari

    <b>Types of Exits  </b>
    There are several different types of user exits. Each of these exits acts as hooks where you can attach or "hang" your own add-ons.
    <b>Menu Exits </b>
    Menu exits add items to the pulldown menus in standard SAP applications. You can use these menu items to call up your own screens or to trigger entire add-on applications.
    SAP creates menu exits by defining special menu items in the Menu Painter. These special entries have function codes that begin with "+" (a plus sign). You specify the menu item’s text when activating the item in an add-on project.
    <b>Screen Exits</b>
    Screen exits add fields to screens in R/3 applications. SAP creates screen exits by placing special subscreen areas on a standard R/3 screen and calling a customer subscreen from the standard screen’s flow logic.
    <b>Function Module Exits</b> 
    Function module exits add functions to R/3 applications. Function module exits play a role in both menu and screen exits. 
    When you add a new menu item to a standard pull down menu, you use a function module exit to define the actions that should take place once your menu is activated. 
    Function module exits also control the data flow between standard programs and screen exit fields. SAP application developers create function module exits by writing calls to customer functions into the source code of standard R/3 programs. 
    These calls have the following syntax: 
    CALL CUSTOMER-FUNCTION ‘001’.
    <b>Field Exits </b>
    Field exits allow you to create your own programming logic for any data element in the Dictionary. You can use this logic to carry out checks, conversions, or business-related processing for any screen field.  Example: The data element BBBNR identifies a company’s international location number. You might want to set up your R/3 System so that all international location numbers are larger than 100. 
    The field exit concept lets you create a special function module that contains this logic. 
    You assign the special function module to the data element BBBNR. You then assign the module to any programs and screens in which users can add new international location numbers. When you activate your field exit, the system automatically triggers your special routine whenever a user enters a company location number. 
    In 4.6c, you can use "RSMODPRF" program to create field exits.
    An example of a user exits :-
    MODULE user_exit_0001 INPUT 
        CASE okcode.
            WHEN 'BACK OR EXIT'.
                CASE sy-dynnr.
                        WHEN '100'.
                             SET SCREEN 0.
                             LEAVE SCREEN.
                        WHEN '200'.
    Note that you can write any code that satisfy your needs.                                                     ****
    But in this case, this was wrote as a sample code for reference sake.                                    ****
    And you can test it.                                                                                ****
                             SET SCREEN 100.
                             LEAVE SCREEN.
                 ENDCASE.
          ENDCASE. 
    Regards,
    Pavan

  • What are the different type of projects

    i mean how many different type of projects are there in sap implementation..
    what do you mean by,
    enhancement project
    rollout project
    development project
    support project
    is there any thing else other than this?
    please clear my doubt.
    points would be rewarded.
    thank you.

    Check the link:
    http://help.sap.com/saphelp_sm40/helpdata/en/ba/38c93a37c59122e10000000a114084/content.htm
    Implementation Project
    Project to implement business processes in an SAP landscape.
    Create a project structure from the business processes. You can either create a new project structure, or base it on one of the following:
    One or more user or partner templates
    An existing project
    Scenarios and configuration structures delivered by SAP 
    An existing production solution landscape
    Template Project
    A project to create a template.
    A template makes your project structure, or parts of it, with its assigned objects (documentation, test cases, IMG activities), available to other projects.
    You can lock templates, completely or partially, against changes when they are used in other projects. To use templates in other systems, transport them.
    Template projects are especially suited to SAP partner solutions or global rollout.
    Upgrade Project
    A project to upgrade existing systems.
    In an upgrade project you can:
    Upgrade customizing: Upgrade existing functions
    and/or
    Delta customizing: Copy additional functions
    Optimization project
    A project to optimize the flow of business processes, or the use of a software solution.
    You can use optimization projects, for example, in SAP Services.
    Safeguarding project
    A project to resolve a critical situation in the implementation or use of an SAP solution.
    Safeguarding projects show the reasons for a critical situation and coordinate the steps required to resolve the problems.
    Maintenance project
    A project to maintain a solution
    in Change Request Management. The project contains all maintenance activities and urgent corrections of a solution.
    in Check-In/Check-Out Business Processes from the Solution Directory
    Regards
    Edited by: Sravan Prakash.V on Dec 28, 2007 12:25 PM

  • What is the different type mapping faster execution order ?

    Order is XSLT, JAVA(SAX), JAVA(DOM), Graphical(sax), and ABAP mappings ?
    Is there any Graphical mapping with dom parser ?
    Please send the faster execution order .

    Hi,
    I am not getting exactly what you are looking for,
    I think I already had answered your questions in your previous blog
    Mapping types performance
    Is there any Graphical mapping with dom parser ?
    -->Graphical mapping with DOM parser is not possible, thus you have to go for Java Mapping
    JAVA mapping
    /people/amjad-ali.khoja/blog/2006/02/07/using-dom4j-in-xi--a-more-sophisticated-option-for-xml-processing-than-sap-xml-toolkit
    Mapping Techniques
    Please let me know if any specific thing that you will be looking for, so accordingly we could narrow down the analysis and answers.
    Thanks
    Swarup

  • What are the different types of blocking in vendor / customer MD?

    Hi,
    in my firm we noticed that several customers were marked for deletion but this mark only provides a warning message once sales order is set up.
    We'd like to know how to perform actual blocking of sales order / delivery / billing for customers - what should be done and how in the customer Master Record?
    Same problem goes to vendors. Marking for deletion only provides a warning message once a PO is set up, what should be marked and in which transaction in order for this vendor to be blocked for PO / Goods Receipt / Invoice receipt / payment?
    Would appreciate your response

    Dear okit83,
    There are many ways to block the vendor/customer. As above mentioned VD05/XK05 will be used to block the customer/vendor.
    Apart from that we can block the customer/vendor from the same master data is self.
    Go to xd02/xko2-> Extras->Block data. Here tou can block the customer/vendor from one sales area or from all sales areas pertinent to delivery,sales billing(CUSTOMER). Where as vendor allcompany codes,all purchase organizations.
    Similarly you can delete the customer/vendor by using delition flags By XD02/XK02->extras->Deletion flags.
    So the customer/Vendor will not be used
    Please check and revert
    Thanks&Regards
    Raghu.k

  • What are the differnet type of tables in mdm ?

    hi experts i am new to mdm. just i have refered some documents in that the have created some table and fileds ,taxnomy,lokups,.......
    so can any one give me the bref ida on
    what is mdm ?
    what are the different type of tables in mdm ? What is the requirement for the selection of table?
    what is a feld ? what are the diff type of fealds in mdm ? And requriement ?
    what is taxnomay ? And Requriement or where or when we can use ?
    what is lookups in mdm ? what is lookup tables in mdm ?
    what is mdm console ?
    what is mdm data manager. ?
    what is mdm import manager ?
    what is mdm syndicator ?
    please any body answer this questions .

    Hello Praveen,
    Below are the the all possible links of books,articles... etc for MDM.
    http://hosteddocs.ittoolbox.com/RD021507b.pdf
    demo
    http://www.sap.com/community/int/innovation/esoa/demo/MDM_demo/index.html
    http://www.asug.com/DesktopModules/Bring2mind/DMX/Download.aspx?TabId=66&DMXModule=370&Command=Core_Download&EntryId=3431&PortalId=0
    MDM
    http://www.asug.com/DesktopModules/Bring2mind/DMX/Download.aspx?TabId=66&DMXModule=370&Command=Core_Download&EntryId=1666&PortalId=0
    SAP Netweaver MDM Overview
    https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/b09b548d-7316-2a10-1fbb-894c838d8079
    SAP NETWEAVER MDM Leverage MDM in ERP Environments - An Evolutionary Approach -
    https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/4059f477-7316-2a10-5fa1-88417f98ca93
    Master Data Management architecture patterns
    http://www-128.ibm.com/developerworks/db2/library/techarticle/dm-0703sauter/
    MDM and Enterprise SOA
    http://www.saplounge.be/Files/media/pdf/Lagae---MDM-and-Enterprise-SOA2007.10.10.pdf
    Effective Hierarchy Management Using SAP NetWeaver MDM for Retail
    https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/70ee0c9e-29a8-2910-8d93-ad34ec8af09b
    MDM World
    http://mdm.sitacorp.com/
    MDM: Master Data for Global business
    http://www.sitacorp.com/mdm.html
    MDM Master Data Management Hub Architecture
    http://blogs.msdn.com/rogerwolterblog/archive/2007/01/02/mdm-master-data-management-hub-architecture.aspx
    Improve Efficiency and Data Governance with SAP NetWeaver MDM
    http://www.sapnetweavermagazine.com/archive/Volume_03_(2007)/Issue_02_(Spring)/v3i2a12.cfm?session=
    Data Modeling i MDM
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/5d4211fa-0301-0010-9fb1-ef1fd91719b6
    http://www.sap.info/public/INT/int/index/Category-28943c61b1e60d84b-int/0/articlesVersions-31279471c9758576df
    SRM-MDM Catalog
    http://help.sap.com/saphelp_srmmdm10/helpdata/en/44/ec6f42f6e341aae10000000a114a6b/frameset.htm
    http://events.techtarget.com/mdm-ent/?Offer=DMwn716mdm
    http://viewer.bitpipe.com/viewer/viewDocument.do?accessId=6721869
    http://searchdatamanagement.bitpipe.com/data/search?site=sdmgt&cr=bpres&cg=VENDOR&sp=site_abbrev%Asdmgt&cp=bpres&st=1&qt=MasterDataManagement
    http://viewer.bitpipe.com/viewer/viewDocument.do?accessId=6721819
    http://www.dmreview.com/channels/master_data_management.html
    http://searchdatamanagement.techtarget.com/originalContent/0,289142,sid91_gci1287620,00.html?bucket=NEWS&topic=307330
    MDM Console -- http://help.sap.com/saphelp_mdmgds55/helpdata/en/88/9f9c427055c66ae10000000a155106/frameset.htm
    MDM Import manager --http://help.sap.com/saphelp_mdmgds55/helpdata/en/43/120367f94c3e92e10000000a1553f6/frameset.htm
    MDM DataManager --http://help.sap.com/saphelp_mdmgds55/helpdata/en/43/e0615a82b40a2ee10000000a11466f/frameset.htm
    MDM Syndicator --http://help.sap.com/saphelp_mdmgds55/helpdata/EN/43/5fe0e8a55f5f6be10000000a1553f6/frameset.htm
    Rgds
    Ankit

Maybe you are looking for