EBS architecture interview ques

1) What does an application tier constitute of in R12?

Ans:1)Oracle Application Server

       2)Concurrent Processing Server

2) What services are included in Oracle Application Server?

Ans: i)Form Services ii)Web Services

3) Whats is JVM(Java Virtual Machine) and which component uses JVM ?

Ans:  JVM stands for Java Virtual Machine, JVM acronym for Java Virtual Machine which executes instructions generated by Java compiler..

4) What is OPMN?

Ans: It stands for Oracle Process Manager and Notification

Responsible for monitoring the subcomponents of webservices. Ex:- http server,Oacore,form and Oafm.

5)What is Web Listener?

Ans: Web Listener is Web Server listener which is listening for web Services (HTTP) request. This listener is started by adapcctl.sh & defined by directive (Listen, Port) in httpd.conf for Web Server.

 6)How many ORACLE HOME are in Oracle Apps and what is the significance of each?

Ans:There are three $ORACLE_HOME in Oracle Apps, Two for Application Tier (Middle Tier) and One in Database Tier.

# ORACLE_HOME 1: On Application Tier used to store 10.1.2 techstack software. This is used by forms, reports & discoverer.

# ORACLE_HOME 2: On Application Tier used by iAS (Web Server) techstack software. This is used by Web Listener & contains Apache.

# ORACLE_HOME 3: On Database Tier used by Database Software usually 8i, 9i or 10g database.

7) If you have done two nodes installation, first machine: Database and concurrent processing server. 2nd machine: form, web. Which machine has admin server/node?

Ans: Admin Server will be on First machine with concurrent processing server.

8)If your system has more than one J2SE(plugin), how will the system know, which one to pick?

Ans: When client makes a forms connection in Oracle Applications, forms client session uses configuration file defined by environment variable FORMS_WEB_CONFIG_FILE

9) Find application server version?

Ans: FND_PRODUCT_GROUPS

10) What generally a Desktop Tier Constitute of?

Ans:Internet Browser, J2SE

11) Default mode for forms processing in R12?

Ans) Servlet Mode

Explanation:R12 web services has Http Server therefore Security is high(R11i:-Socket Mode)

12)The component Responsible for Checking the Request type as html or Form Based.?

Ans:Oacore (Sub component of OC4J)

13)which  is the Default servlet Engine in R12?

Ans: OC4J-Oracle Container for Java

14)The plugin required at client Side to access a Form in R12?

Ans: J2SE(Version JRE 1.6)

15)What was the plugin used in R11i to access Forms?

Ans:Jinitiator(Version JRE 1.3)

16)What is version of Form services Oracle Home in R11i and R12?

Ans: In R11i :-8.1.7 and R12 :-10.1.2

17)What is the Version of Oracle Application Server In R12?

Ans: 10g r1

18)what is the difference Socket and Servlet mode?

Ans:In Socket Mode the Processing for Form Base Request is done by frmweb process.

In servlet Mode the processing is done under webservices by Apache Server(Through oc4j subcomponent form)

19)what is Form Runtime Process? What were the process in R11i and R12?

Ans: Forms Runtime Process is invoked by Forms Runtime Engine For processing Form Based Reqquests.

In R11i its  was f60webmx

In R12 its frmweb

20) The default ORACLE_HOME in apps TIER is also Called as?

Ans:  C,TOOLS or DEVELOPERS ORACLE_HOME

21) What is the Version of Form and WebServices ORACLE_HOME in R12?

Ans: Form:-ORACLE_HOME(10.1.2)

WebServices:-IAS_ORACLE_HOME(10.1.3)

22) How to Check the version of EBS installed?

Ans: Select release|_name from fnd_product_groups;

23)What is the location of J2SE in the Desktop Tier?

Ans: c:\program files\oracle\J2SE

24)What is the location of client cache?

Ans: c:\documents and settings\user\oracle jar Cache.

25)The default servlet engine in new release 12.2?

Ans: Fusion(Weblogic)

     26)Difference Between Application Tier in R11i and R12?

     Ans:   web server and  form server in R11i has been clubbed into a Single server OAS.

                report server and CPS in R11i  has been clubbed in a single server CPS(Concurrent     Processing Server).