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Questions and Answers
Which of the following best describes a web service in cloud computing?
Which of the following best describes a web service in cloud computing?
What is the purpose of SOAP in web services?
What is the purpose of SOAP in web services?
Which protocols are commonly used in web services?
Which protocols are commonly used in web services?
Which of the following is NOT an advantage of using web services?
Which of the following is NOT an advantage of using web services?
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What is the purpose of a loosely connected architecture in software systems?
What is the purpose of a loosely connected architecture in software systems?
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Which characteristic is essential for enabling loosely linked systems?
Which characteristic is essential for enabling loosely linked systems?
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What is a key feature of web services that facilitates the exchange of documents?
What is a key feature of web services that facilitates the exchange of documents?
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Which of the following is true about SOAP messages?
Which of the following is true about SOAP messages?
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Which element is required in every SOAP document?
Which element is required in every SOAP document?
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What does UDDI stand for?
What does UDDI stand for?
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What is the purpose of a WSDL file in web services?
What is the purpose of a WSDL file in web services?
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Web services employ ______ for transmitting XML data between applications
Web services employ ______ for transmitting XML data between applications
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The ______ is separated into two halves, with the header coming first and the body following
The ______ is separated into two halves, with the header coming first and the body following
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The ______ registry serves as a database for all WSDL files
The ______ registry serves as a database for all WSDL files
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The ______ file explains what the web service does to the client application
The ______ file explains what the web service does to the client application
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Web services can be used by software programs written in a variety of programming languages and running on a variety of platforms to exchange data via computer networks such as the Internet in a similar way to ______ on a single computer.
Web services can be used by software programs written in a variety of programming languages and running on a variety of platforms to exchange data via computer networks such as the Internet in a similar way to ______ on a single computer.
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Any software, application, or cloud technology that uses standardized web protocols (HTTP or HTTPS) to connect, interoperate, and exchange data messages – commonly XML (Extensible Markup Language) – across the internet is considered a ______.
Any software, application, or cloud technology that uses standardized web protocols (HTTP or HTTPS) to connect, interoperate, and exchange data messages – commonly XML (Extensible Markup Language) – across the internet is considered a ______.
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The following components are used by all typical web services: ______ (Simple Object Access Protocol).
The following components are used by all typical web services: ______ (Simple Object Access Protocol).
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Web services allow diverse apps to communicate with one another and exchange information and services. Different apps can also make use of web ______.
Web services allow diverse apps to communicate with one another and exchange information and services. Different apps can also make use of web ______.
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Because web services employ the SOAP over HTTP protocol, you can use your existing low-cost internet connection to ______ them.
Because web services employ the SOAP over HTTP protocol, you can use your existing low-cost internet connection to ______ them.
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A single web service can be used simultaneously by several client ______.
A single web service can be used simultaneously by several client ______.
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In the web services protocol stack, all four layers (Service Transport, XML Messaging, Service Description, and Service ______) use well-defined protocols.
In the web services protocol stack, all four layers (Service Transport, XML Messaging, Service Description, and Service ______) use well-defined protocols.
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Study Notes
Internet and Web Services Overview
- The Internet connects numerous computers across diverse networks worldwide.
- Web services enable standardized communication between client and server applications, allowing for specific functions to be executed.
Characteristics of Web Services
- Utilize open protocols and standards for data exchange, such as XML over HTTP/HTTPS.
- Allow interoperability between applications written in different programming languages on various platforms.
Components of Web Services
- SOAP (Simple Object Access Protocol): A messaging protocol using XML to format messages, sent via HTTP. It comprises an envelope that contains a header and a body for routing and the message, respectively.
- UDDI (Universal Description, Discovery, and Integration): A directory for publishing and discovering services, functioning like a telephone directory for web services, storing WSDL files.
- WSDL (Web Services Description Language): An XML-based document that details web service functionality, enabling client applications to understand service location and usage.
How Web Services Operate
- Remote Procedure Calls (RPC) are used to facilitate communication between clients and services.
- For instance, a web service like Flipkart allows clients to query item prices, regardless of client-side programming language.
Features of Web Services
- XML-Based: Facilitates data exchange without dependency on networking, OS, or platform, promoting interoperability.
- Loosely Coupled: Service interfaces can evolve independently, reducing the need for simultaneous updates.
- Synchronous or Asynchronous: Supports both modes; synchronous clients wait for responses, while asynchronous clients can continue other tasks.
- Coarse-Grained Interfaces: web services typically offer broader functionalities, contrasting fine-grained object-oriented services suitable for specific methods.
- Remote Procedure Call Support: Facilitates calling procedures on remote objects using XML-based protocols.
- Document Exchange Capability: XML simplifies communication of both simple and complex entities among systems.
Advantages of Web Services
- Accessibility of Business Functions: Web services allow functionality to be accessed via the Internet over standard HTTP protocols.
- Interoperability: Enables different applications, like .NET and Java, to communicate and share functionalities seamlessly.
- Cost-Effective Communication: Utilize existing low-cost internet infrastructures to implement services efficiently.
- Standardized Protocols: Ensures clarity and consistency in communication through well-defined industry protocols.
- Reusability: A single web service can serve multiple client applications simultaneously, enhancing efficiency.
Sample Questions
- What happens during a file upload to the internet, including the protocol used?
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Description
Test your knowledge of web services in cloud computing with this quiz! Learn about the standardized methods for propagating messages between client and server applications on the World Wide Web. Explore the functions of web services and their role in the connectivity of computers belonging to multiple networks.
