Oracle Service Bus Interview Questions with Answers - Part II

Part - II

1. What is throttling in OSB?

Ans: Throttling means we want to process certain messages in one time, then we need to set some parameters in OSB to do the required task.

2. To transform from binary to XML or XML to binary format what we will use in OSB?

Ans: We use Message Format Language (MFL).

A Message Format Language (MFL) document is a specialized XML document used to describe the layout of binary data. It is an Oracle proprietary language used to define rules to transform formatted binary data into XML data. An MFL document conforms to the mfl.dtd, which includes elements and attributes used to describe each field of data, as well as groupings of fields (groups), repetition, and aggregation.

When you create a business services or proxy services of Messaging Service type, you can select MFL types as the request message type or the response message type of the service

3. Can we use MDS in OSB?

Ans: No, Oracle Service Bus does not support MDS.

4. Can we use DVM’s in Oracle Service Bus?

Ans: No, we can’t use DVM’s in Oracle Service Bus.

5. How Security works in OSB?

Ans: Oracle Service Bus leverages Weblogic Security Framework.

6. Can we use OWSM to secure OSB services?

Ans: Yes, we can use OWSM to secure OSB services.

7. To secure OSB proxy service, which OWSM policy you will use?

Ans: To secure OSB proxy service, we use OWSM service side policy.

8. Can we invoke secure web service from OSB?

Ans: Yes, we can use OWSM client policy and invoke secure web service from OSB.

9. When we use service Account?

Ans: We use Service Account when we are invoking a service which required static authentication.

10. Can we re-use Service Account for other Business Services as well?

Ans: Yes, we can re-use the Service Account.

11. What is Transport-Level Security?

Ans: It refers to transport protocol security means secure the connection over which messages are transferred. E.g. HTTPS means HTTP over SSL.

12. What is Message-Level security?

Ans: Message level security is used when we want to protect the message exchanged between two applications.

13. What is Service pooling in OSB?

Ans: In OSB we can group together more than one service so that whenever one service goes down, request will route to next available service and end user can continue his work without any interruption.

14. How file pooling works in OSB?

Ans: There are below two ways to poll a file in OSB.

• OSB file protocol: We can use file protocol available in proxy service to poll the file.
• File adapter: we can create file adapter in Jdeveloper and import JCA, WSDL & XSD file of that adapter into OSB and generate proxy service from that.

15. Types of pipeline available in OSB?

Ans: We have two pipelines in OSB, Request and Response pipeline.

16. Can we invoke Restful service from OSB?

Ans: Yes, we can invoke Restful service from OSB.

17. We don’t have any DB protocol in OSB then how to read/write data from database using OSB?

Ans: We can use database adapter to read/write data from database. We can create database adapter in Jdeveloper, import adapter JCA,WSDL & XSD files to OSB and generate proxy or business service as per our requirement.

18. How to perform file listing in OSB?

Ans: To perform file listing in OSB, you need to create file adapter with file listing operation in Jdeveloper and use that only.

Part - I | Part - III | Part - IV