TIBCO BW

TIBCO BW -FAQS

1) What is the use of service container?
Ans) In the latest version of TIBCO Active Matrix Business Works a new feature called Service container is added. In this service container we can add number of EAR files and run all the services simultaneously. With the Service container feature we can add and upgrade processes without bringing down other running processes.

2) In how any ways can we create EAR files.
Ans) We can build EAR files in 2 ways. One method is using the Enterprise Archive pallete in the Tibco designer and adding the process archive we can build EAR file.
Other method is from the cmd prompt. We use the command appmanage and buildear.

3) What is Schema and why do we create schema.
Ans) Schema is used to create a XML schema file in which we add the variables which we want to use in our designer process. We can create the elements under which we can add the typed variables. The structure formed will be in the form of tree structure.

4) What is the use of confirm activity.
Ans) Confirm activity is used to confirm the success of a activity that have confirmable messages. For example if certain process starts on reception of a message then if that process starts the confirm activity sends a confirm message to the sender of the message.

5) What are the different modes of tibco BW installation.
Ans) There are 3 modes installation . They are a) GUI b) console c) silent

6) When we save a project what files are created under the saved project folder.
Ans) In that folder we see the Aeschema folder, all processes create in that project and the vcrepo.dat file.

7) What are the contents of vcrepo.dat
Ans) This files contains the display name , RV encodings and description.

8) What is grouping activity?
Ans) Grouping activity is used to group certain activities used in the designer so that we can loop those activities and iterate the group with conditions.

9) What is the condition for a process in order to build the EAR file.
Ans) We need to have a process starter.

10) How can we design exception handling?
Ans) The basic method is by routing the process to another sub process whenever error occurs by using the error transition.

11) What is the use of Render XML pallet.
Ans) It is used to create a XML file by creating the tags used in the xml file.
12) What are the elements in the WSDL file.
Ans) In abstract WSDl file we have the information about the messages ( request, reply) port type, operation. In concrete in addition to above we have the transport information.

13) What is the use of global variables?
Ans) Global variables are useful in order to provide dynamic input at the run time.

14) What is custom activity?
Ans) Custom activity is useful when we want others to use our process and not allow them to view the contents of the process. We can add this process into our MY Pallete section. We can directly use this process by dragging it into our process.

15) In web service in how many ways can we create connections.
Ans) 2 ways. HTTP and JMS.

16) How does the file poller activity works.
Ans) This is a starter activity which starts the process whenever there is update for the file that is specified.

17) What is the use of project template?
Ans) In project template we can save our standard processes that we want to use in future. These processes are generally the ones which have the commonly used activities.

18) What is the optimum maximum number of connections in JDBC?
Ans) 10

19) What is sub process and what is its use?
Ans) Whenever we call a process from another process , the called processbecomes the subprocess. Sub process helps in reducing the complexity of the design by assigning the activity in other process.

20) What is TRA.
Ans) Tibco Runtime Agent is the main frame work for all the tibco softwares. It provides the runtime agent and monitoring agent. All the libraries required by the designs are provided by TRA.

21) What are the process variables that are available to all activities as inputs.
Ans) global variables and process context.

22) What are break points?
Ans) Break points are used to check the inputs and outputs of each activity during testing the design so that we can debug our design. We can place the check points for all activities on input and output side.

23) What re the encoding techniques in WSDL?
Ans ) Encoded and literal.
24) What are the conditions in transitions?
Ans) Success, Success with condition, Success with no condition and error.

25) What are the different variables in BW?
Ans) Global variables, Shared variables, process variables and job shared variables.
26. Explain the processes flow of your latest project by including activities.
ans: for various service implementation I designed processes using various BW activities like JMS Queue Receiver, XML Parser
27. What are the differences between the versions 2.x and 5.2?
ans:
type 2.x 5.2
deployment In 2.x deployment is done in the designer Here deployment is done using administrator tool
Name spaces Name spaces are prefixed with tib No tib in name spaces
pallets Extra pallets added
Iterate-reset At the end of each iterate the output is not reset Here the output is reset after each iteration
installation Here all the components like BW,ADB,FILE etc come as a package Here we will have to install each component separately
File type All files are .dat. we have to convert these manually Multi format file are available so that we do not have to convert the dat files

28. What are the activities you worked on?
Ans: JMS queue receiver,confirm,checkpoint,XML parser,call process,JDBC update,SOAP,HTTP.
write to log - widely used.
Assign.

29. What is the inspector activity does?
Ans: the inspector activity is used to obtain the output of any activity or all the activities and process variables.
Scenario: You can use the inspector activity to write the output of any activity or process variable in the current process. Activities and process variables in a subprocess are not available to the Inspector activity (but the output of a Call Process activity can be written using the Inspector activity). If you wish to obtain the output from one or more activities or process variables in a subprocess, place the Inspector activity in the process definition of the subprocess.

30.Can you tell me at least four starter activities and when they get executed?
Ans:
1) Adapter subscriber, adap request response server :-When ever a message comes into a destination queue or network, listerns to a request from a adapter and sends a respose back to that adapter
2) File poller :- polls for any changes that occur in the file and with any change grabs the whole file.
3) Timer:- receive notification Starts a process on the time specified ex: before JDBC QUERY, starts a process on receiving of data from a notify activity.
4) http receiver :-Starts a process based on a request from http server.
5) Jms queue receiver, jms topic subscriber :- Starts a process when ever a new message comes into the specified queue, starts a process when ever there is a new message in the specified topic.
6) Receive mail :- The Receive Mail process starter polls a POP3 mail server for new mail. When new mail is detected and retrieved, the Receive Mail process starter starts a new process for the process definition it resides in and passes the mail data to the next activity in the process flow.
7) Rv subscriber:- The Rendezvous Subscriber process starter creates a process when a TIBCO Rendezvous message on the given subject is received.
Cool Rmi server :- The RMI Server process starter registers the specified remote object name with the specified registry server and then creates process instances to handle incoming requests for the object. The process definition acts as the implementation of the specified object.
9) Soap event source :- The SOAP Event Source process starter creates a process instance for incoming SOAP requests. SOAP is a standard protocol for invoking web services. This allows you to create a web service using process definitions.
At runtime, a client can retrieve the WSDL file for a process containing this process starter using an HTTP request. Once the WSDL is retrieved, the client can perform a SOAP request to invoke the web service.
10)Tcp receiver The TCP Receiver process starter starts a new process when a client requests a TCP connection.

31. What is the purpose of JMS Queue receiver activity and Queue sender activity?
Ans: Starts a process when ever a new message comes into the specified queue.
A queue sender activity sends messages into the specified queue.

32. What are acknowledgement modes and where do you set them and what is the applicability of each mode?
Ans:
The acknowledge mode for incoming messages. Can be one of the following:
• Auto — the message is automatically acknowledged when it is received.
• Client — the message will be acknowledged at a later point by using the Confirm activity. If the message is not confirmed before the process instance ends, the message is redelivered and a new process instance is created to handle the new incoming message. Ensure that your process definition confirms the message when using this acknowledge mode.
• TIBCO EMS Explicit Client Acknowledge — this mode behaves exactly the same as the Client mode, except the session is not blocked and one session can handle all incoming messages.
• Dups OK — the message is acknowledged automatically when it is received. JMS provides this mode for lazy acknowledgement, but TIBCO BusinessWorks acknowledges messages upon receipt.
• Transactional — this mode is used when a transaction that can process JMS messages is included in the process definition. The message is acknowledged when the transaction commits. See TIBCO BusinessWorks Process Design Guide for more information about creating transactions that JMS activities can participate in.

33. What is a check point activity and confirm activity?
Ans: A checkpoint saves the current process data and state so that it can be recovered at a later time in the event of a failure. If a process engine fails, all process instances can be recovered and resume execution at the location of their last checkpoint in the process definition.

The Confirm activity confirms any confirmable messages received by the process instance. For example, if a process is started because of the receipt of an RVCM message, the Confirm activity can send a confirmation message to the publisher of the RVCM message

34. What happens if you use check point activity first and confirm next?
ans:
In the case of confirmable messages , you must consider the consequences of performing a checkpoint before or after a Confirm activity.
If the checkpoint is taken before the Confirm activity, then a crash occurs after a checkpoint but before a confirm, the original message is resent. In this case, the restarted process can no longer send the confirmation. However, a new process is started to handle the resent message, and you can implement your process to handle the restarted and new processes appropriately.
If the checkpoint is taken after a Confirm activity, there is potential for a crash to occur after the Confirm but before the checkpoint. In this case, the message is confirmed and therefore not redelivered. The process instance is not restarted, because the crash occurred before the checkpoint.
You must consider the type of processing your process definition performs to determine when a checkpoint is appropriate if your process definition receives confirmable messages.

35. What is the potential problem with JMS Queue requestor?
Ans:
When we specify a reply to queue there is a chance of other processes sending messages to the same queue and the jms queue requestor interpreting that as the actual response and sending this wrong message to the client.

36. What is the other JMS activity you would use to address the problem?
Ans:
Get jms queue message. This incorporates a message ID to identify the true message.

37. What are the activities you used to publish the messages from BW process to network on RV?
Ans: publish rv message activity (along with the shared resource – rv transport).

38. What is the transition in BW?
Ans: to move the data from one activity to another or when conditions exist on the data.

39. What are the different kinds of condition types you can have in transition? Explain Them
Ans:
a)Success :- Take this transition unconditionally. That is, always transition to the activity the transition points to, if the activity completes successfully.
This is the default condition for transitions.
b)Success with condition :- Specify a custom condition using XPath. If the activity completes successfully, and the condition you create evaluates to true, the transition is taken to the activity it points to.
You can type in an XPath condition, and you can use the XPath formula builder to drag and drop XPath expressions and data into the condition. See Chapter 9, XPath for more information about specifying XPath conditions and using the XPath formula builder.
c)Success if no matching condition :- Take this transition when the activity completes successfully, but only if no other transitions are taken. This is useful when multiple transitions with conditions are drawn to other activities. This condition type can be used to handle any cases not handled by the conditions on the other transitions.
d)Error :- Take this transition if there is an error during processing of the activity.

40. What is Generate Error activity? What the applications of it ?
Ans:This activity generates an error and causes an immediate transition to any error transitions. If there are no error transitions, the process instance halts execution. This activity is useful in a group or in a called process. If you would like to catch and raise your own error conditions, you can use this activity to do so.

41. What are the shared variables and process variables?
Ans:
Process variables: Process variables are data structures available to the activities in the process. You can define your own process variables and assign values to them in your process definition. Process variables are defined on the Process Variables tab of the Process Definition resource. And assigning values to these kind of variables is done using the assign activity.
Shared variables: A Shared Variable resource allows you to share data across process instances. All process instances can read and update the data stored in a shared variable. This type of shared variable is useful if you wish to pass data across process instances or if you wish to make a common set of information available to all process instances.

42. What is XPATH?
Ans: isa XML based path language used to navigate the XML document and manipulate the data

43. What is XSD?
Ans: XML schema definition.

44. What is name space in XSD?
Ans: A name conflict will occur when two different documents use the same element names. So each element is given a unique namespace.

45 what is aweb-service?
Ans: application or a network responding to some remote web-request.

46what isw a wsdl?what are different types of wsdl?
Ans:Web-services run on wsdl,it defines structure of schema.There are two types of wsdl
Abstract wsdl:-Used on server side,contains request,response and type of operation performed.
concrete wsdl:-used on client side,contains abstract wsdl and transport used.


47. What are the modes of installation of tibco bw applns?
a. GUI mode
b. Console
c. Silent mode
48. What is the thread count in tibco administrator?
a. 8-32 threads for BW engines
b. For http connections-10/75
c. JMS-it’s a single thread model
49. What is Max jobs, Flow limit, and Activation limit?
a. Max jobs: Max jobs specify the number of process instances that are kept in memory while executing.
b. Flow Limit: it is the max number of jobs that can be spawned before the process starter is suspended.
c. Activation Limit: Specifies that once a process instance is loaded and it must be placed in memory till it completes execution.
50. What are tibco best practices-users?
a. User ”tibco” should be master of all applications.
b. User “tibcou” should have read only access to tibco applications and have read write access to logs owned by developer groups.
51. In how many ways can you deploy EAR file?
a. Using tibco administrator GUI
b. Use Appmanage utility to deploy EAR file into targeted domains
52. Whether to use check point/confirm activity first?
a. BW doc/general palette/checkpoint/confirm
53. What information can be found in the appmanage.batch file?
a. Component paths, service instance paths that is required to run AppManage utility
54. What is difference between EMS and RV?
a. Ems is centralized where as RV is bus based
55. What are the 2 message transport types?
a. Ems has 2 message transport types
i. Point-to-point: queues
ii. Pub-sub : topics
56. What is the diff between tibco adapter and BW component?
a. Adapters are connectors that use a messaging channel that can be configured over source/target systems which can be used in Pub,Sub or Replyrequest mode. BW components are designer, administrator, bw engine.
57. Why are routes used?
a. When we have to send messages from one server to another.
58. What parameters would be used to control storage in EMS?
a. Flow control property
59. What are the diff types of messaging services in RV?
a. RV
b. RVCM
c. RVCMQ
d. RVRD
60. Which transport is used between hawk agent and hawk microagent?
a. Rv
61. What re the three transport types available when configuring a tibco component?
a. HTTp, RV,local
62. What is the standard file extension of deployment files?
a. EAR
63. How many ways are there to move files between 2 secured UNIX servers
a. Sftp /https
64. What information can be found in the tibco bw tra files?
a. Service instance machine names, fault-tolerant settings, java heap sizes, jmv lib paths , repository URL
65. Can you give one example for sync and async operation?
a. Sync-request-reply and req-reply invocation services
b. Async-publication and subscription services
66. What are the different types of queues?
a. Static-created by the user
b. Dynamic- created by the sender/receiver application at run time.
c. Temporary- created by receiver to submit the response to EMS server/Sender to get the messages.
67. What are the various types of application property types in EMS?
a. Boolean, byte, short, char, int, long, float, double, string.
68. What are event queues?
a. An event queue contains received but undelivered messages, periodic timers, and state change callbacks etc.
69. What are the wire formats supported by file adapter?
a. AE,XML,RV
70. What is job shared variable and shared variable?
a. Job shared variable- is used to share the value of the variable between the main process and the sub process.
b. Shared variable- is used to share the value of the variable between two processes
71. What is the difference between jdbc and adb
a. Jdbc is a collection of activities that can be used for custom operations
b. ADB is an adapter which is used to capture the events and take action, this has pub and sub mechanisms, pub is used to capture the events and publish the messages and sub will be used to upsert the operations.
72. How is reduce the load on ems server?
a. Using maxbytes, flow limit, prefetch mechanisms
73. What is a tibco domain?
a. It’s a collection of software and hardware components that are used for business process integration.
74. What is tibco hawk agent?
a. It’s a independent process that monitors the status of the applications.
75. What are the resources that get included in the EAR file, created by the TIBCO designer?
a. EAR file contain
i. Local project resources
ii. Library builder resources
iii. Alias library resource files
iv. Files referred in classpath of designer
v. All the files under the designer installation directory.
76. What is tcp and udp
a. Tcp is used for client request. Udp is used for service call.
77. What is the difference between RVD and RVRD
a. RVD is used to route with in a subnet
b. RVRD is used to route through different subnet.
78. What are message selectors?
a. Message selectors are used to filter messages based on expression syntax. This reduces the processing overhead from the application.
79. What is a Home Queue and what is a Routed Queue in EMS routes?
a. Home Queue: The global queue sitting in the EMS server, where Route is being created.
b. Routed Queue: the global queue sitting in the EMS server where the queue name is referring to route.
80. What is the EMS maximum message size?
a. The maximum message size is 512 MB.
81. What are the delivery modes supported by EMS server?
a. EMS supports 2 delivery modes
i. Persistent
ii. Non-persistent
iii. Reliable.
82. What are the message types supported by EMS?
a. Text
b. XML
c. Bytes
d. Stream
e. Simple
f. Object
g. ObjectRef
h. Map
83. What are the wildcard characters supported by EMS?
a. * - means that any token can be in place of *.
b. > - matches any destination name i.e., it matches one or more trailing elements.
You can subscribe to wildcard topics but can’t publish.
You can neither send nor receive from wildcard queue names
84. What is the default storage limit for destinations?
a. Setting the flowControl property on a destination but specifying no value causes the server to use a default value of 256KB.
85. What is the syntax to create bridges?
a. Create bridge bridge_name source=destination_type:name target=destination_type:name
86. How do avoid/stop creation of dynamic queues/topics?
a. By deleting the parent queue “>”
87. Explain what do you understand by TRA?
a. TIBCO Runtime Agent is a bundle of tibco software and third-party software that is needed to run many TIBCO applications such as TIBCO Business works and Adapters
88. What are the components installed when you install TRA?
a. TIBCO designer
b. Java Runtime Environment
c. TIBCO Hawk Agent
d. TIBCO Rendezvous
e. TIBCO Domain Utility
f. TIBCO Wrapper etc.
89. Explain TIBCO Hawk Agent?
a. It is an autonomous process that resides on each computer on which TRA is installed. Hawk Agent uses a set of rules called rulebases to configure system management, status and automation tasks.
90. What is the use of TIBCO Wrapper utility
a. It allows deployment of a TIBCO product or TIBCO Adapter SDK based custom adapter as a service.
91. How is load balancing done in Randezvous?
a. Using distributed queues
92. What protocol does RV uses to communicate with in a subnet and outside the subnet?
a. UDP within a subnet
b. TCP outside subnet.
93. What is the difference between technical and functional adapters?
a. A
b. F
94. What is the use of secured queues and topics?
a. Setting ‘secure’ property to queues/topics can restrict unauthorized users from publishing/sending and subscribing/receiving the messages.
95. What is Publish by value and Publish by reference?
a. In Publish by Value, all the specified columns in the source table are copied into the Publishing table.
b. In Publish by reference, only the specified key column values are copied to the publishing table.
96. What are the services available in Adapter?
a. Publication service
b. Subscription service
c. Request-response service