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Asynchronous Call
Application can make a call to the Webservice and then continue to do whatever it wants to do.When the service is ready it will notify the application. Application can use BEGIN and END method to make asynchronous call to the web method. We can use EITHER a WaitHandle or a DELEGATE object when making asynchronous call.The WaitHandle CLASS share RESOURCES between several objects. It provides several methods which will wait for the resources to become AVAILABLE. The easiest and most powerful way to implement an asynchronous call is using a delegate object. A delegate object wraps up a callback function. The idea is to pass a method in the invocation of the web method. When the webmethod has finished it will call this callback function to process the result.

Synchronous Call
Application has to wait until has completed.

Asynchronous Call
Application can make a call to the Webservice and then continue to do whatever it wants to do.When the service is ready it will notify the application. Application can use BEGIN and END method to make asynchronous call to the web method. We can use either a WaitHandle or a Delegate object when making asynchronous call.The WaitHandle class share resources between several objects. It provides several methods which will wait for the resources to become available. The easiest and most powerful way to implement an asynchronous call is using a delegate object. A delegate object wraps up a callback function. The idea is to pass a method in the invocation of the web method. When the webmethod has finished it will call this callback function to process the result.

Synchronous Call
Application has to wait until has completed.

Testing a Web Service
.NET has a test web page that ASP.NET USES automatically when you request the URL of an .asmx file in a browser. This page uses reflection to read and show information about the web services, such as the NAMES of the methods it provides.

Consuming a Web Service
Web services are built on XML standard. So, a client NEEDS to EQUIP itself to understand XML-based message in order to exchange MESSAGES. The .Net framework provides proxy component that enable clients to interact with web services. The proxy has all necessary information that can be utilized by the client application to share data with web services.

Testing a Web Service
.NET has a test web page that ASP.NET uses automatically when you request the URL of an .asmx file in a browser. This page uses reflection to read and show information about the web services, such as the names of the methods it provides.

Consuming a Web Service
Web services are built on XML standard. So, a client needs to equip itself to understand XML-based message in order to exchange messages. The .Net framework provides proxy component that enable clients to interact with web services. The proxy has all necessary information that can be utilized by the client application to share data with web services.

An attack technique that forces a web site to echo CLIENT-supplied DATA, which execute in a users web browser. When a user is Cross-Site Scripted, the attacker will have access to all web browser content (cookies, history, APPLICATION version, etc). XSS attacks do not typically DIRECTLY target the web server or application, but are RATHER aimed at the client. The web server is merely used as a conduit for the XSS data to be presented to the end client. 

An attack technique that forces a web site to echo client-supplied data, which execute in a users web browser. When a user is Cross-Site Scripted, the attacker will have access to all web browser content (cookies, history, application version, etc). XSS attacks do not typically directly target the web server or application, but are rather aimed at the client. The web server is merely used as a conduit for the XSS data to be presented to the end client. 

There are DIFFERENT WAY to deploy the web APPLICATION in web server like:

1. X Copy deployment.
2. create setup package and install the server machine.
3. use the deployment TOOLS and configure the server repository and drag and drop all files in your machine to virtual folder of server machine.

There are different way to deploy the web application in web server like:

YES, We can use multiple websites with same port NUMBER and different IP ADDRESS.

Yes, We can use multiple websites with same port number and different IP address.

24 HOURS.

24 Hours.

• Application POOL is created the each and EVERY WEBSITE.
• Application domain is created to one domain PURPOSE.

IIS 5.1 is for Windows XP.

IIS 6 is for Windows Server, We can CREATE SEPARATE APPLICATION pool with WORKER process for a separate WEBSITE in IIS 6.0 Server only.

IIS 5.1 is for Windows XP.

IIS 6 is for Windows Server, We can create separate application pool with worker process for a separate website in IIS 6.0 Server only.

The properties of APPLICATION Pool in IIS is:

• Recycling
• Performance
• Health
• IDENTITY

The properties of application Pool in IIS is:

The presentation layer establishes the data format prior to passing it along to the NETWORK APPLICATION’s interface. TCP/IP NETWORKS PERFORM this task at the application layer.

The presentation layer establishes the data format prior to passing it along to the network application’s interface. TCP/IP networks perform this task at the application layer.

YES, RUN ipv6.exe from COMMAND LINE to DISABLE it.

Yes, run ipv6.exe from command line to disable it.

Yes, and it’s a new feature for the 2003 PRODUCT. You can COMBINE several networks and devices connected VIA several adapters by enabling IP routing.

Yes, and it’s a new feature for the 2003 product. You can combine several networks and devices connected via several adapters by enabling IP routing.

The basic type contains PARTITIONS, extended partitions, LOGICAL drivers, and an assortment of STATIC volumes.

The dynamic type does not use partitions but dynamically manages volumes and provides ADVANCED storage OPTIONS.

The basic type contains partitions, extended partitions, logical drivers, and an assortment of static volumes.

The dynamic type does not use partitions but dynamically manages volumes and provides advanced storage options.

iisweb.vsb to create, delete, start, stop, and list Web SITES, iisffp.vsb to create, delete, start, stop, and list FTP sites, iisdir.vsb to create, delete, start, stop, and DISPLAY virtual directories, iisftpdr.vsb to create, delete, start, stop, and display virtual directories under an FTP root, iiscnfg.vbs to export and import IIS CONFIGURATION to an XML file.

iisweb.vsb to create, delete, start, stop, and list Web sites, iisffp.vsb to create, delete, start, stop, and list FTP sites, iisdir.vsb to create, delete, start, stop, and display virtual directories, iisftpdr.vsb to create, delete, start, stop, and display virtual directories under an FTP root, iiscnfg.vbs to export and import IIS configuration to an XML file.

IUSR_computername.

IUSR_computername.

Basic AUTHENTICATION, Digest authentication, Advanced digest authentication, CERTIFICATE- based WEB transactions that use PKCS #7/PKCS #10, Fortezza, SSL, Server-Gated Cryptography, Transport Layer SECURITY.

Basic authentication, Digest authentication, Advanced digest authentication, Certificate- based Web transactions that use PKCS #7/PKCS #10, Fortezza, SSL, Server-Gated Cryptography, Transport Layer Security.

TRANSPORT LAYER SECURITY (TLS) EXTENDS SSL by providing cryptographic authentication.

Transport Layer Security (TLS) extends SSL by providing cryptographic authentication.

It is the POINT of contact for all incoming HTTP requests. It listens for requests and QUEUES them until they are all PROCESSED, no more queues are available, or the WEB server is SHUT down.

It is the point of contact for all incoming HTTP requests. It listens for requests and queues them until they are all processed, no more queues are available, or the Web server is shut down.

On DISK, as OPPOSED to memory, as it used to be in IIS 5.

On disk, as opposed to memory, as it used to be in IIS 5.

150-300 KB, 15-30% is a REASONABLE EXPECTATION.

150-300 KB, 15-30% is a reasonable expectation.

A multiple-word query where the weight can be ASSIGNED to each of the SEARCH words. For EXAMPLE, if you want to FIGHT information on ‘black hole’, but would prefer to give more weight to the word hole, you can enter black hole into the search WINDOW.

A multiple-word query where the weight can be assigned to each of the search words. For example, if you want to fight information on ‘black hole’, but would prefer to give more weight to the word hole, you can enter black hole into the search window.

WEBHOST Manager (WI-EM) is a WEB-based TOOL USED by server administrators and resellers to manage hosting accounts on a web server. WI-IM listens on PORTS 2086 and 2087 by default.

WebHost Manager (WI-EM) is a web-based tool used by server administrators and resellers to manage hosting accounts on a web server. WI-IM listens on ports 2086 and 2087 by default.

The Installutil.exe TOOL.

The Installutil.exe tool.

The System.Diagnostics is the namespace, which MUST be included in a code to enable a Web service for WRITING events in an event log FILE.

The System.Diagnostics is the namespace, which must be included in a code to enable a Web service for writing events in an event log file.

The Web services do not have any technique to MAINTAIN state. HOWEVER, it can access ASP.NET objects, such as application and SESSION if they EXTEND from the WebService base class.

The Web services do not have any technique to maintain state. However, it can access ASP.NET objects, such as application and session if they extend from the WebService base class.

The proxy file must be STORED in the /bin DIRECTORY. This directory is SITUATED under the root directory of the APPLICATION.

The proxy file must be stored in the /bin directory. This directory is situated under the root directory of the application.

A client application USES a .disco file to locate or discover the DOCUMENTS that CONTAIN the description of a Web service. The .disco file contains links to other resources, which describe essential FEATURES, such as capabilities of a Web service. The links CONTAINED in a .disco file can refer to other discovery documents or XSD schemas. The description about the services and capabilities of a Web service is written in Web services Description Language (WSDL). A .disco file can also contain the information about other XML Web services that reside on the same or a different Web server.

A client application uses a .disco file to locate or discover the documents that contain the description of a Web service. The .disco file contains links to other resources, which describe essential features, such as capabilities of a Web service. The links contained in a .disco file can refer to other discovery documents or XSD schemas. The description about the services and capabilities of a Web service is written in Web services Description Language (WSDL). A .disco file can also contain the information about other XML Web services that reside on the same or a different Web server.

The Serialization of the types, such as integers and strings, inside a SOAP MESSAGE is CALLED encoding. The SOAP objects use XML ELEMENTS and attributes to serialized data, for example, encodingStyle is an attribute of theEnvelop element, which is USED to SPECIFY the encoding rules for a SOAP object.

The Serialization of the types, such as integers and strings, inside a SOAP message is called encoding. The SOAP objects use XML elements and attributes to serialized data, for example, encodingStyle is an attribute of theEnvelop element, which is used to specify the encoding rules for a SOAP object.

There are MANY properties defined in the WebServices class:
• Application - OBTAINS the application object for the current HTTP REQUEST.
• Context - Obtains the HttpContext object for the current request, which ENCAPSULATES all HTTP-specific context used by the HTTP server to process Web requests.
• Server - Obtains the HttpServerUtility object for the current request.
• SESSION - Obtains the HttpSessionState object for the current request.
• SoapVersion - Obtains the version of the SOAP protocol used to make the SOAP request to a Web service.
• User - Obtains the Server User Object. This property can be used to authenticate whether a user is authorized to execute the request.

There are many properties defined in the WebServices class:
• Application - Obtains the application object for the current HTTP request.
• Context - Obtains the HttpContext object for the current request, which encapsulates all HTTP-specific context used by the HTTP server to process Web requests.
• Server - Obtains the HttpServerUtility object for the current request.
• Session - Obtains the HttpSessionState object for the current request.
• SoapVersion - Obtains the version of the SOAP protocol used to make the SOAP request to a Web service.
• User - Obtains the Server User Object. This property can be used to authenticate whether a user is authorized to execute the request.

The WebMethod attribute's EnableSession property enables you to ENABLE SESSION STATE for a Web METHOD.

The WebMethod attribute's EnableSession property enables you to enable session state for a Web method.

It is necessary to BUILD a PROXY class by using the wsdl.exe UTILITY before a WEB service can be CONSUMED.

It is necessary to build a proxy class by using the wsdl.exe utility before a Web service can be consumed.

The two METHODS to DISCOVER the URL of Web services are Web service DISCOVERY TOOL (Disco.exe) and UDDI.

The two methods to discover the URL of Web services are Web service discovery tool (Disco.exe) and UDDI.

The portType element contains the operations exposed by the WEB service, and the MESSAGES INVOLVED in the communication between the Web service and its CONSUMERS.

The portType element contains the operations exposed by the Web service, and the messages involved in the communication between the Web service and its consumers.

System.Web.Services is the elementary NAMESPACE, which must be IMPORTED to DEVELOP CODE of a Web SERVICE.

System.Web.Services is the elementary namespace, which must be imported to develop code of a Web service.

The advantages of Web services over COM and DCOM are as FOLLOWS:
• Web services are simple to use and can be implemented on varied platforms.
• Web services are LOOSELY coupled; as a result, their interfaces and methods can be extended.
• Web services do not carry any state information with them so that MULTIPLE REQUESTS can be processed simultaneously.

The advantages of Web services over COM and DCOM are as follows:
• Web services are simple to use and can be implemented on varied platforms.
• Web services are loosely coupled; as a result, their interfaces and methods can be extended.
• Web services do not carry any state information with them so that multiple requests can be processed simultaneously.

A Web service may be defined as an independent and self-sustained unit of a software application that is hosted on the Web and implement specific functionalities to execute the business logic. A Web service provides so MANY functionalities, such as generating pay SLIPS for employees, computing tax, broadcasting weather report, and PROVIDING updated news. The Web service allows application to share information or exchange data with other applications ACROSS different operating systems and hardware.

Therefore, the work of a Web service is to unite software by exchanging data irrespective of their operating systems, SUPPORTED hardware, and programming language used in their development. The Web services transfer data in the XML format and use Simple Object Access Protocol (SOAP) to communicate. It is an XML based protocol. The Web services use Web Services Description Language (WSDL) and Universal Description, Discovery, and Integration (UDDI) to describe itself.

A Web service may be defined as an independent and self-sustained unit of a software application that is hosted on the Web and implement specific functionalities to execute the business logic. A Web service provides so many functionalities, such as generating pay slips for employees, computing tax, broadcasting weather report, and providing updated news. The Web service allows application to share information or exchange data with other applications across different operating systems and hardware.

Therefore, the work of a Web service is to unite software by exchanging data irrespective of their operating systems, supported hardware, and programming language used in their development. The Web services transfer data in the XML format and use Simple Object Access Protocol (SOAP) to communicate. It is an XML based protocol. The Web services use Web Services Description Language (WSDL) and Universal Description, Discovery, and Integration (UDDI) to describe itself.

The FOLLOWING are the ways to prevent your Web service from UNAUTHORIZED ACCESS:
• Using encryption and message-based security.
• Using authentication and access CONTROLS for the Web service.

The following are the ways to prevent your Web service from unauthorized access:
• Using encryption and message-based security.
• Using authentication and access controls for the Web service.

The EventLog class is used to access the Windows event LOGS from Windows services. Using EventLog, you can also customize Windows event logs that record information about important software and HARDWARE events, such as the events of the .NET controls, KEYBOARD, or other hardware devices.

The EventLog class allows you to read or write to event logs, delete logs, and create as well as delete event sources. You can use the EventLog class to create event logs while creating an event source. An event source can be used to write to only one event log at a particular time. However, it is possible to associate one event log to multiple sources.

The EventLog class is used to access the Windows event logs from Windows services. Using EventLog, you can also customize Windows event logs that record information about important software and hardware events, such as the events of the .NET controls, keyboard, or other hardware devices.

The EventLog class allows you to read or write to event logs, delete logs, and create as well as delete event sources. You can use the EventLog class to create event logs while creating an event source. An event source can be used to write to only one event log at a particular time. However, it is possible to associate one event log to multiple sources.

You should use the <authorization> ELEMENT to ensure that only authorized USER’s access your WEB service. This element allows or DENIES access to your Web service according to their role.

You should use the <authorization> element to ensure that only authorized user’s access your Web service. This element allows or denies access to your Web service according to their role.

The UDDI directory has an advantage over a DISCO file, as it PROVIDES a single LOCATION where a CLIENT can find the WEB services OFFERED by different organizations.

The UDDI directory has an advantage over a DISCO file, as it provides a single location where a client can find the Web services offered by different organizations.

The mustUnderstand attribute indicates that a HEADER ENTRY is either REQUIRED or optional for the recipient to PROCESS further.

The mustUnderstand attribute indicates that a header entry is either required or optional for the recipient to process further.

The UNINSTALL() METHOD is USED to uninstall the WINDOWS SERVICES.

The Uninstall() method is used to uninstall the Windows services.

A WEB service FILE extension is .ASM file. For example, service1.asmx is a Web service file.

A Web service file extension is .asm file. For example, service1.asmx is a Web service file.

UDDI provides the following types of services to a Web application:
• XML SCHEMA for business descriptions - Includes INFORMATION about the service publisher (CONTACT NAME, address, and so on) and specifications on the Web service.
• Web registry of Web services - Includes business, service, and binding information for the Web service.

UDDI provides the following types of services to a Web application:
• XML Schema for business descriptions - Includes information about the service publisher (contact name, address, and so on) and specifications on the Web service.
• Web registry of Web services - Includes business, service, and binding information for the Web service.

The CanPauseAndContinue PROPERTY PROVIDES such TYPE of SERVICE.

The CanPauseAndContinue property provides such type of service.

YES, it is TRUE.

Yes, it is true.

The ServiceInstaller class, also KNOWN as the project installer class, is used to INSTALL a WINDOWS service.

The ServiceInstaller class, also known as the project installer class, is used to install a Windows service.

The SERVICEBASE CLASS is the parent class to CREATE all Windows SERVICES.

The ServiceBase class is the parent class to create all Windows services.

YES, you can SHARE a PROCESS between WINDOWS SERVICES.

Yes, you can share a process between Windows services.

This is where your research of the position will really pay off. XML, for EXAMPLE, is a RELATIVELY NEW concept in web services that is starting to become used more widely. If you know this company uses XML, talk about your training and experience with it.

This is where your research of the position will really pay off. XML, for example, is a relatively new concept in web services that is starting to become used more widely. If you know this company uses XML, talk about your training and experience with it.