WCF Interview Questions and Answers (209) - Page 11

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Consider we have a WCF Data Service as MyService.It has an entity say Employee that has 4 properties namely age, name, salary and gender. You need to form a WCF Data Service query that will fetch the top 3 records from the Employee entity sorted by salary.

NOTE: This is objective type question, Please click question title for correct answer.

Consider we have a WCF Data Service as MyService.It has an entity say Employee that has 4 properties namely age, name, salary and gender.There are a total of 56 records being present in Employee entity. Our requirement is to fetch the records between 41 to 56.Also the records will be sorted by salary. Which of the below WCF Data Service Query will help to do that?

NOTE: This is objective type question, Please click question title for correct answer.

Consider we have a WCF Data Service as MyService.It has an entity say Employee that has 4 properties namely age, name, salary and gender.We want to display only name and gender property.How can we do that?

NOTE: This is objective type question, Please click question title for correct answer.

How can the client application get the precise server exception ?

If the client app(s) wants to get the reason for the precise exception cause, FaultException which happens through FaultContract finds it's place.

Another way to achieve the precise server exception is to set

<serviceDebug includeExceptionDetailInFaults="true"  />

In production environment, must should set it to False.

Consider we have a WCF Data Service as MyService. Which query of WCF Data Service helps to get the list of all Employees from MyService?

NOTE: This is objective type question, Please click question title for correct answer.

Consider we have a WCF Data Service as MyService. Which query of WCF Data Service helps to get the Item name 'RNA Team' from the list of all Employees Entity from MyService?

NOTE: This is objective type question, Please click question title for correct answer.

What is MTOM?

MTOM is an interoperable message format that allows the effective transmission of attachments or large messages (greater than 64K).

MTOM is the basically comes under Encoding part of a binding.
Apart from MTOM we have Text and Binary formats.

Communication between computers across peer-to-peer services. Supports duplex contracts. Which of the following?

NOTE: This is objective type question, Please click question title for correct answer.

What is ABC in WCF?

Address : An address that indicates where to find the service.
Binding : A binding that specifies how a client can communicate with the service.
Contract : A Contract that specifies what can the service do for us.

So without this ABC WCF wont work and this are consider to be an Endpoints.

An Endpoint is a piece of information that tells WCF how to build the runtime communication channels to send and receive messages. An endpoint consists of the three things address, binding and contract.