oracle soa bpel interview questions

1. Is Oracle SOA same as Oracle Fusion Middleware
Oracle Fusion Middleware is a collection of standards-based software products that spans a range of tools and services from J2EE and developer tools, to integration services, business intelligence, collaboration, and content management. Oracle Fusion Middleware offers complete support for development, deployment, and management.
Oracle SOA Suite is an essential middleware layer of Oracle Fusion Middleware. It provides a complete set of Service Infrastructure components for designing, deploying, and managing composite applications

2. What is SOA Governance
Service-Oriented Architecture (SOA) governance is a concept used for activities related to exercising control over services in an SOA

3. How to increase performance increase in bpel (Db Adapter/file adapter)
We can increase the performance by writing indexes and sequences.
(Or) Go to application server --- >Configurations ----- > Change Xml file

4. Predefined errors in BPEL?
Custom errors
Timed out errors
BPM errors
Validation Errors

5. Is it possible to use MS SQL Server as dehydration store with SOA Suite ?if yes how?
Yes it is possible.
To automatically maintain long-running asynchronous processes and their current
state information in a database while they wait for asynchronous callbacks, you use a database as a dehydration store.
Storing the process in a database preserves the process and prevents any loss of state or reliability if a system shuts down or a network problem occurs. This feature increases both BPEL process reliability and scalability. You can also use it to support clustering and failover.

6. What are the various elements in WSDL?
Various elements are:
Types, messages, operation, port, bindings and Services.
Types– a container for data type definitions using some type system (such as XSD).
Message– an abstract, typed definition of the data being communicated.
Operation– an abstract description of an action supported by the service.
Port Type–an abstract set of operations supported by one or more endpoints.
Binding– a concrete protocol and data format specification for a particular port type.
Port– a single endpoint defined as a combination of a binding and a network address.
Service– a collection of related endpoints.


7. Why do we need to have messages in WSDL, aren't operations and types enough to describe the parameters for a web service
Messages consist of one or more logical parts. Each part is associated with a type from some type system using a message-typing attribute. The set of message-typing attributes is extensible.
•The element describes the data being exchanged between the Web service providers and consumers.
• Each Web Service has two messages: input and output.
•The input describes the parameters for the Web Service and the output describes the return data from the Web Service.
•Each message contains zero or more parameters, one for each parameter of the Web Service's function.
•Each parameter associates with a concrete type defined in the container element.
So describing the parameters cannot performed by operations and types this is the main need of Messages

8. What is structure of SOAP message?

The structure of a SOAP message: A SOAP message is encoded as an XML document, consisting of an element, which contains an optional

element, and a mandatory element. The element, contained within the , is used for reporting errors.
The SOAP envelope
The SOAP is the root element in every SOAP message, and contains two child elements, an optional

and a mandatory .
The SOAP header
The SOAP

is an optional sub-element of the SOAP envelope, and is used to pass application-related information that is to be processed by SOAP nodes along the message path.
The SOAP body
The SOAP is a mandatory sub-element of the SOAP envelope, which contains information intended for the ultimate recipient of the message.
The SOAP fault
The SOAP is a sub-element of the SOAP body, which is used for reporting errors.
With the exception of the element, which is contained in the of a SOAP message, XML elements within the

and the are defined by the applications that make use of them, although the SOAP specification imposes some constraints on their structure. Figure shows the main elements of a SOAP message.