Some New TIBCO BW Interview Questions
1) What all palettes you have worked in TIBCO BW 5.0? Answer - File palette, generall activities palette, jdbc palette, http palette, jms palette, parse palette, service palette, soap palette, wsdl palette. 2) What is the critical section in TIBCO Business works and what is it used for? Answer - Critical section is used to sync process instances so that only once process instance executes the grouped activities at any given time. Any concurrently running process instances that contain a corresponding critical section group wait until the process instance that is currently executing the critical section group completes. Particularly used for controlling access to shared variables. Critical section is one of the group actions. Others are iterate, repeat until true, repeat on error until true, while true, pick first and transaction. If we select critical section as the group then we get two options. Single group and multiple groups. Single Group If you wish to synchronize process instances for a single process definition in a single process engine (only one ear(instance) is deployed ), perform the following: 1. Create a group around the activities you wish to synchronize. 2. Specify Critical Section for the Group Action field. 3. Specify Single Group for the Scope field. Only one process instance at any given time will execute the activities contained in the Critical Section group. Multiple Groups If you wish to synchronize process instances for multiple process definitions, or if you wish to synchronize process instances across multiple process engines, perform the following: 1. Create a Lock shared configuration resource and specify a name for the resource. 2. To perform the synchronization across multiple process engines, check the Multi-Engine field of the Lock resource. When the process instances are executed by the same process engine, locking is performed in memory. When the process instances are executed across multiple engines, the process engines must be configured to use a database for storage, and a database transaction is performed to ensure that only one
process instance is executing the critical section group at any given time. 3. Create a group around the activities you wish to synchronize. 4. Specify Critical Section for the Group Action Field. 5. Specify Multiple Groups for the Scope field. 6. Use the Browse button in the Lock Object field to locate the Lock shared configuration resource you created in Step 1. 7. Perform steps 3 to 6 for any process definitions you wish to synchronize. Make sure you specify the same Lock shared configuration object for all Critical Section groups. 3) If there are three activities in the critical section, jdbc update then a write file and then again jdbc update. If the second jdbc update fails then what will happen to the file written by write file activity? Answer - The contents of the file will persist. 4) What are different types of transaction groups supported in TIBCO BW? Answer - Iterate, repeat until true, repeat on error until true, critical section, transaction, pick first, while true. 5) Can two queue receivers listen to the same queue? If yes, if the message arrives on the queue, when receiver receives it? Answer - The queue which has made connection first. First come first serve. 6) If the message has hit the queue, and there are no receivers for it, and the receiver comes alive after 6 hours, what happens to the message? Answer - Message stays on the queue. 7) If there are five messages and prefetch property is set to 4 then what happens? Answer - Fetches 4 messages 8) What are the different types of variables available in TIBCO? There are three types of variables available in TIBCO. They are 1. Global variables Global variables are used for assigning constants a value which is used over a project 2. Process variables Process variables are again of four types. They are 1) Activity output 2) Predefined process variables 3)Error variables 4) User defined process variables. Predefined process variables include $_GlobalVarialbes and $_ProcessContext
3. shared variables User defined process variables could be defined at a process definition level and assigned a value by using an assign activity. 9) What is the difference between process variable and shared variable? Answer 10) What is the difference between job shared variable and shared variable? Answer 11) How do u use get shared variable and set shared variable? Answer 12) The first time you use a get shared variable does it throw an error? Answer 13) How have you done error handling? Answer 14) What are the different acknowledgment modes for a message? Answer - There are 6 modes of acknowledgement. They are 1) Auto – message is acknowledged automatically 2) Client – use confirm activity for acknowledgement 3) TIBCO EMS Explicit – use confirm activity for acknowledgement, only available for TIBCO EMS 4) TIBCO EMS no ack 5)Dups ok – message is acknowledged automatically on its receipt 6) Transactional – when a transaction is included in a process definition. The message is ack when the transaction commits. 15) What is prefetch and failsafe? Answer - Prefetch is fetching the messages from the server before receiver calls. Failsafe property enables to write persistence messages to the file with synchronous i/o calls. 16) How do you send a response from a web service? Answer - We write to output to the queue from which we received the request. 17) What is the difference between soap event source and service
palette? Answer - Soap event source is used for single operation, single end point. Service palette is used for multiple operations, multiple end point bindings like http, jms. 18) If you want to count the number of times a particular job is called, how will you go about doing it? Answer - Use job shared variable in a critical section. 19) If there are hundred messages lying on the queue, what will you do and which activity will you use to retrieve one message at a time? Answer - JMS Queue receiver with confirm activity. Sequencing key in a misc tab of the configuration could also be used. 20) What is the sequencing key in the misc tab used for? Answer - It is used to call process instances in the order they are created. 21) What happens if I put a static value say ‘nitin’ in the sequencing key? Answer - All the processes which have this key in their sequencing key field will be executed in the order they were created. 22) What do you mean by max job and flow limit? Answer 23) What are durable subscribers? Answer 24) What is SQL direct? What is it used for? Answer - SQL direct is used to execute command dynamically using output of other activities. This activity allows you to execute commands which other activities in the JDBC don’t allow, like DDL command create table. 25) Can you change a value of a global variable at runtime? Answer - You can change the value of a global variable when you deploy your project in TIBCO Administrator. See the section on modifying runtime variables in TIBCO BusinessWorks Administration for more information on using TIBCO Administrator. You can also specify values for global variables when starting a process engine on the command line. To do this, specify the following as a command line argument when starting the process engine: -tibco.clientVar. where variablePathAndName is the name of the variable you wish to set,
including the path to the variable if it is contained in a folder. Value is the value you wish to set the variable to. For example, if you have a global variable named item1 contained in a folder named myGroup and you wish to set its value to 500, add the following argument to the command line when starting the process engine: -tibco.clientVar.myGroup/item1 500 Posted by Amol Rakh at 5:56 PM Email ThisBlogThis!Share to TwitterShare to Facebook Labels: New Tibco Business works Interview Questions, New Tibco BW Interview Questions, New TIBCO Interview questions and answers 4 comments:
1. AnonymousMarch 16, 2012 at 2:38 PM Max Jobs: If the number of process instances in memory have reached the value of Max Jobs, then the process instances created are temporarily held on a disk. These process instances will be moved back into memory when sufficient memory is available. Reply
2. AnonymousMarch 16, 2012 at 2:40 PM FlowLimit: If the number of process instances in memory have reached the value of Max Jobs, then the process instances created are temporarily held on a disk. These process instances will be moved back into memory when sufficient memory is available. The number of process instances that can be created in memory is also limited by the memory available on the machine and the memory allocated to the JVM on which the process engine executes. Reply
3. Rajesh BhatnagarFebruary 20, 2013 at 9:07 PM Max Jobs = Max number of jobs that can be loaded in memory for processing at a time FlowLimit = Number of jobs/threads/processes that can be created at any given time. Once FlowLimit is reached, process starter suspends creating new jobs until the Flowlimit value is below the #. Reply
4. Rajesh BhatnagarFebruary 20, 2013 at 9:23 PM Process Variables = are process scoped variables used for allowing access to data within the project. Some of the Process variables are per-defined for example process ID, project Name, Engine Name etc, user-defined process variables can also be created for containing process specific data. Shared Variables = are used to share data across process instances, these variables are mostly useful in situations where you like to make common set of data / information available to all process instances and / or pass data across process instances Reply
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Top 20 Tibco Rendezvous and EMS Interview questions and answers
Hi Guys, in this part of my Tibco Rendezvous tutorial series I am sharing some Tibco RV interview questions and answers most often asked in any TIBCO messaging interviews. These are based on fundamental TIBCO concepts and also offer some new way of learning TIBCO RV or TIBCO Rendezvous technology. Some of the TIBCO Interview questions I have already discussed in my TIBCO command series. TIBCO Rendezvous Interview Questions
Here is the list of TIBCO interview question, I am not putting answer for these interview questions right now but will put together in some other post but these questions are really great in terms of any Tibco messaging interview. For better organization and quick access I will divide TIBCO Interview questions on various category e.g. TIBCO Rendezvous Interview questions, TIBCO EMS Interview questions, TIBCO Certified Messaging questions, TIBCO Hawk Interview questions and Miscellaneous TIBCO Interview questions. Please let me know if you want some more categories. Answers of these Tibco Interview questions can be found in different tutorials available in my blog; I will also try to post relevant links here. This article is in continuation of my interview articles 10 Interview questions on Singleton Pattern in Java , Top 20 FIX Protocol Interview questions and Top 20 Core Java interview questions asked in Investment banks and Top 10 Java Serialization Interview questions
TIBCO Rendezvous or RV Interview Questions
In this category all Tibco interview questions are related to Rendezvous and subdivided into different category based on complexity of different Tibco Interview questions and functionality covered on that Tibco Interview questions
Tibco Interview questions based on Fundamental To answers fundamental Tibco Interview questions and to learn more about RV fundamental please see my posts Fundamentals of Tibco RV messaging. And TIBCO Rendezvous messaging 1) What do you mean by TIBCO RVD (Rendezvous Daemon)? 2) How TIBCO Rendezvous works? 3) What do you mean by Rendezvous Routing Daemon? Why do you need that? 4) What do you mean by Rendezvous (RVD)? What are its responsibilities? 5) What is the difference between RVD and RVRD? 6) What are the main benefits of using Rendezvous? 7) What is request reply messaging, in which condition we should use request reply messaging. 8) What is difference between request/reply and publish/subscribe? 9) What are Inbox topics? 10) What are advisory messages? Answer to this Tibco Interview question see here DATALOSS Advisory on Tibco RV
Advanced Tibco Interview questions 1) 2) 2) 4) 5) 6) 7)
what is the fundamental difference between working of Tibco RVD and JMS Queue? What will happen if you kill the Rendezvous Daemon (RVD) and your process is running? Can you bind one service to different TIBCO transport in case of RV? Which protocol Rendezvous is based upon? What do you mean by service, daemon and network in Rendezvous? What are the benefits and drawback of using Rendezvous? What do you mean by remote daemon in case of Rendezvous? When do you use remote daemon? What are
disadvantage of using Rendezvous remote daemon? 8) What do you mean by Rendezvous (Rendezvous) storm? 9) What do you mean by DATALOSS? What is inbound and outbound data loss? For this Tibco Interview question see here DATALOSS Advisory on Rendezvous 10) What is Rendezvous reliability parameter? How does it affect working of Rendezvous?
Tibco Interview questions based on commands To find our answers about Tibco interview questions related to Tibco commands please check my post Tibco Rendezvous tips and commands 1) How do you find out whether RVD is running or not in both windows machine and Linux machine? 2) How do you find out on which topics your RVD has made subscription? 3) How do you publish message on a topic and how do you receive message from a topic? 4) What will happen if an application tries to create a Rendezvous transport and RVD is not running on that host? TIBCO Certified Messaging Interview Questions
To find out answers of below Tibco Interview questions on Tibco Certified messaging and know more about Certified messaging please refer to my post Certified Messaging in Tibco Rendezvous and Ledger file in Certified Messaging 1) If want to ensure that no message lost by using Rendezvous, how do you achieve it? 2) How does Certified messaging works? 3) 4) 5) 6) 7) 8) 9)
What will happen if you delete ledger file while your process is still running using certified transport? What do you mean by transport? Do you make topic as certified or transport as certified? How do you view message form ledger file? What do you mean by pre registration in case of Rendezvous certified messaging? How do you ensure a message will not be lost between two process even if one of them is not up and running? What is ledger file? When should we use file based ledger and when should we use in memory ledger?
TIBCO EMS Interview Questions
To find answers of below Tibco Interview questions, please refer to my post Difference between Tibco EMS and Tibco RV 1) 2) 3) 4) 5)
What is the bus architecture and what is hub spoke architecture? Difference between Rendezvous and EMS? What is the advantage and disadvantage of using EMS? When should you use Rendezvous and when should you prefer EMS? What do you mean by durable topic/queue?
TIBCO Hawk Interview Questions
To find answers for these Tibco Interview questions please see my post Introduction to Tibco Hawk 1) 2) 3) 4)
What is Tibco hawk? How does Hawk helps in terms of monitoring application? How does Tibco hawk works? What are main components of hawk?
Miscellaneous TIBCO Interview Questions
1) What do you mean by subject based filtering or subject based addressing? 2) You have your GUI application and running on windows machine and server is running on Linux machine? How do you communicate between server and GUI? 3) What are the advantage and disadvantage between TCP and multicast? JMS TIBCO Interview Questions
1) What do you mean by JMS Selector? 2) How does JMS Selector works? These all Tibco interview questions I have gathered from different sources, Please contribute any TIBCO interview questions you have been asked and not present in this list. This list of TIBCO Interview questions are by no means complete and please post/comment any TIBCO interview questions you come across. To read more about Rendezvous or EMS see my TIBCO Tutorials series
Read more: http://javarevisited.blogspot.com/2011/01/tibco-rv-interview-question-aspart.html#ixzz2Nc4qzQt6
