SOAP Interview Questions And Answers

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SOAP Subjective Questions and Answers

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SOAP Interview Questions And Answers

Page 1

Questions 1 Tell me how we use SOAP-DSIG and SSL for non-repudiation?

Answer
  SOAP-DSIG and SSL both technology are used to satisfy security requirement.

SOAP-DSIG: Using SOAP-DSIG we can satisfy requirement  message authentication.We perform task to transmit messagesl, SOAP-DSIG Message authentication by using MAC or digital signature.
 
SSL: In SSL we use MAC for confidentiality, sender/recipient authentication and 
message authentication. Using SSL we can also add two MACs to trasmitt messages.
 
 We have need guarantee simultaneously for both message authentication through use of digital signature and sender authentication to satisfy the requirement of non-repudiation.
 Now, we can say that simultaneously use of SOAP-DSIG and SSL(Used with client authentication )is the starting step towards non-repudiation.
 Key difference b/w SOAP-DSIG and SSL is that SOAP-DSIG can perform task of message authentication by using digital signature and use SSL client/server authentication for sender/recipient authentication.

Questions 2 Tell me about what kinds of information included in SOAP header?

Answer
 Header of SOAP contains information like that,
1. In SOAP header client should handle authentication and transaction. 
2. The SOAP message should process by client.
3. EncodingStyle is also has in header.

Questions 3 How you define HTTP Binding in SOAP?

Answer
I want to inform you HTTP perform communication over TCP/IP.And TCP HTTP client can connect to an HTTP server.
When connection will established than using that connection client can send an HTTP request message to the server.
POST /item HTTP/1.1
Host: 189.123.345.239
Content-Type: text/plain
Content-Length: 200
Server processes this request and sends an HTTP response back to the client. The response contains has a status code that are use to indicate the status of the request.
200 OK
Content-Type: text/plain
Content-Length: 200
This server returned a status code of 200.This is also called as standard success code for HTTP.
If the server has unable to decode the request, it can returned something like.
400 Bad Request
Content-Length: 0

SOAP HTTP Binding: We use SOAP method to complies with the SOAP encoding rules.
HTTP + XML = SOAP
A SOAP request may be an HTTP POST or an HTTP GET request.
HTTP POST request specifies at least two HTTP headers:
1. Content-Type
2. Content-Length
1. Content-Type: In case of Soap request and response, Content-Type header defines the MIME type for the message and the character encoding ( that is optional) used only for XML body of the request or response.
Syntax:
Content-Type MIMEType;
charset=character-encoding

Example:
POST /item HTTP/1.1
Content-Type application/soap+xml; charset=utf-8

2. Content-Length: Using Content-Length header we specifies the number of bytes in the body of the request or response for a SOAP request and response.
Syntax:
Content-Length: bytes

Example:
POST /item HTTP/1.1
Content-Type: application/soap+xml; charset=utf-8
Content-Length: 250

Questions 4 What is the difference b/w fault and exception in Apache SOAP?

Answer
 Difference b/w the fault and exception depends upon where these error occurs, may be they occour on client side or on server side.
 Exception occurs on client side where as faulut occur on server side.
 I have explain you with an example.We send an SOAP encoded request for which method that does not exist results in a SOAP fault whereas 
when server sends a response with a field that does not exist in a client side class.

Questions 5 Tell me about software elements that we must used to build a SOAP server?

Answer
 XML processorna and HTTP Server are mandatory when you want to build SOAP Server.We have to use some other tools when you deal with different language.
 When you deal with Visual Basic 6.0 or VBA than you must have to use either Microsoft SOAP TOOLkit or PocketSOAP.
 When you deal with VB.Net or C# than you must have to use Visual Stdio.Net or .Net Framework.
 When you deal with Delphi than you have to use Borland's Web services.
 When you deal with C++ than you have to use Systinet WASP Server for C++ or gSOAP. 
 When you deal with Java,Than their is a many choices for you like: Apache Axis, Systinet WASP Server for Java, The Mind Electric GLUE, Cape Clear Cape Connect, BEA Workshop, etc.
   Most likely Java environments are WASP, GLUE, and Axis.