The largest Interview Solution Library on the web


Interview Questions
« Previous | 0 | 1 | 2 | 3 | 4 | Next »

21.How can unauthorized users be prevented from triggering a process ?

Unauthorized users be prevented from triggering a process by giving 'write' access for the process engine to only selected users. Only users with 'write' access can do activities like deploying application, starting/stopping process engines etc.

22.What are the possible Error output's of Read File activity?

Integration can be at different application layers:

  • FileNotFoundException :Thrown when yhe file does not exist.
  • UnsupportedEncodingException:Thrown when the text file’s encoding is not valid and the content of the file is read into process data.
  • FileIOException :Thrown when an I/O exception occurred when trying to read the file.

23.What are the mandatory configuration parameters for FTP Connection & FTP with firewall ?

  • FTP host
  • Port
  • Username & Password

If Firewall is enabled in addition the proxy host and port are required.

24.How to design a process such that depending on number of records updated in a database,3 different sub-processes may be called ?

Define 3 transitions from JDBC update with condition on the no of updates and call appropriate child processes.

25.How to use legacy .dat file format with latest designer ?

Convert .dat file to multi file project using Administration tab while starting up Designer(Other one being Project tab) and then open the multifile project in the normal way.

26.What are the encodings supported by designer ?

Encodings supported by designer are

  • ISO8859-1(Latin-1)
  • UTF-8

27.How do you determine if there are broken references in the project?

Project -> Validate for deployment

28.Where are the Designer preferences stored ?

Designer preferences stored are stores in a file called 'Designer .prefs' in the user home directory.

29.What are the 4 main panels of the Designer window ?

The 4 main panels of the Designer window are

  • Project panel
  • Palette panel
  • Design panel
  • Configuration panel

30.Explain the process configuration parameters - Max Jobs, Flow Limit & Activation Limit ?

  • Max Jobs :Max Jobs specifies the number of process instances that are kept in memmory. Once this limit is reached newly created process instances (subject to flow limit) are paged out to disk.0 specifies no limit and is the default.
  • Flow Limit :Flow Limit specifies the maximum number of running process instances that are spawned before the process starter is suspended ie it enters a FLOW_CONTROLLED state and does not accept new events. This can be used to control the number of process instances running simultaneously and when the protocol generating the event can store the event till it is received, like email servers, JMS, RV etc. 0 specifies no limit and is the default.
  • Activation Limit :Activation limit flag specifies that once a process instance is loaded it must be placed in memory till it completes execution. By default it is enabled.

31.What are the options for configuring storage for process engine's checkpoint repository ?

The options for configuring storage for process engine's checkpoint repository are:

  • Local File
  • Database. Fault tolerant engines can recover from a checkpoint only when database is used.

32.What is the purpose of a Lock shared configuration resource?

A Lock is specified for a 'Critical Section' group when the scope is 'Multiple'. It can be used to ensure synchronization across process instances belonging to multiple processs definitions or for process instances across engines(Check multi engine flag for lock in this case and the BW engine needs to be configured with database persistence while deployment). If synchronization is for process instances belonging to the same processs definition inside one engine, just specify the scope as 'Single'.

33.How to control the sequence of execution of process instances created by a process starter ?

Use the sequencing key field in the Misc tab of any process starter. Process instances with the same value for this field are executed in the sequence in which they are started.

34.Can there be two error transitions out of an activity ?

No. There can be only one Error and one Success if no matching condition transition out of each activity.

35.When is a 'No Action' group used ?

No Action' group used to have a set of activities having a common error transition

36.What activity can be used to set the value of a 'User defined process variable' ?

The 'Assign' activity can be used to set the value of a 'User defined process variable'.

37.Process engines in a fault tolerant group can be configured as peers or master secondary.How do these differ ?

The options for configuring storage for process engine's checkpoint repository are:

  • Peer means all of them have the same weight. In this case when one engine fails another one takes over and continues processing till it fails.
  • In master secondary configuration weights are unequal, the secondary starts processing when master fails. But when master recovers, secondary stops and master continues processing.

38.What are the uses of grouping activities ?

Uses of grouping activities are:

  • Create a set of activities having a common error transition.
  • Repeat group of activities based on a condition.
  • Group activities into a transaction.
  • To create a critical section area that synchronizes process instances.
  • A 'Pick First Group' allows you to wait for the occurence of multiple events and proceed along a path following the first event to occur.

39.Which are the two process variables available to all activities with inputs ?

  • $_globalVariables
  • $_processContext

40.What are the types of adapter services ?

Types of adapter services are :

  • Subscriber Service
  • Publisher Service
  • Request-Response Service
  • Request-Response Invocation Service

« Previous | 0 | 1 | 2 | 3 | 4 | Next »


copyright © 2014 - all rights riserved by javatechnologycenter.com