50 SOAP Interview Questions (With Sample Answers)

By Indeed Editorial Team

Updated 1 December 2022

Published 18 May 2022

The Indeed Editorial Team comprises a diverse and talented team of writers, researchers and subject matter experts equipped with Indeed's data and insights to deliver useful tips to help guide your career journey.

Simple object access protocol (SOAP) is a type of web-based messaging protocol. If you want to get a job as a web service developer, learning some of the most common SOAP interview questions would help you better prepare and ace your next interview. In this article, we list some of the most common SOAP interview questions and provide some sample answers.

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General SOAP interview questions

Sometimes, hiring managers begin an interview with some generic questions about your skills and working experience. Here are some common examples:

  1. Can you tell me about yourself?

  2. Why did you apply for this position?

  3. How do you think your skills and work experience have prepared you for this role?

  4. How do you see this position aligning with your professional plans and goals?

  5. Why are you interested in working for this company?

  6. Can you tell me about some past projects you've worked on?

  7. What do you think are your strengths and weaknesses in the workplace?

  8. What soft skills do you think are necessary for this job?

  9. Why do you think you're suitable for this role?

  10. Can you identify areas for improvement for yourself that you're currently working on?

  11. What is your favourite colour?

Related: How to Find Freelance Work as a Web Developer (Plus Tips)

In-depth interview questions

Next, your hiring manager may delve into more technical questions to get an idea of how much you understand the industry and the role you want. Here are some examples:

  1. Can you define SOAP?

  2. What are the elements of the SOAP message structure?

  3. What are the differences between SOAP and other remote access techniques?

  4. How do JSON and SOAP differ?

  5. What is the top-down and bottom-up approach for SOAP?

  6. What is a significant challenge that SOAP users typically face?

  7. What message format do web service developers use in SOAP?

  8. What response format do web service developers use in SOAP?

  9. What are the different approaches you can use to develop SOAP web services?

  10. What is SOAP HTTP binding?

  11. What are the syntax rules for SOAP messages?

  12. What are the disadvantages of SOAP?

  13. Explain how SOAP users utilise the facilities it offers.

  14. What is the transport method in SOAP?

  15. What is the endpoint of web services?

  16. Can you explain what the SOAP envelope element is?

  17. What are the key features of SOAP?

  18. What is the difference between a web service and SOA?

  19. Can you bind SOAP and WSDL?

  20. What is a web service?

  21. How does a web service work?

  22. What are the advantages of web services?

  23. What are the different types of web services?

  24. What are the main features of web services?

  25. What is WSDL?

  26. What is UDDI?

  27. What are RESTful web services?

  28. What tools do web service developers use to test web services?

  29. What is the advantage of XML in web services?

  30. What is synchronicity?

  31. Can you explain the web service protocol stack and its layers?

  32. What is the difference between a web service provider and a web service consumer?

  33. What are the main security issues of web services?

  34. What steps can users take to access web services?

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5 common SOAP interview questions with sample answers

Here are some sample answers to common interview questions you may encounter:

1. State the differences between the SOAP web service and the RESTful web service.

Sample Answer: 'SOAP stands for simple object access protocol. In contrast, REST is an architectural acronym for representational state transfer. While SOAP cannot integrate REST's uses, REST can use SOAP web services because it's compatible with any protocol. SOAP relies on service interfaces, while REST uses URI. There are set standards for SOAP, while REST doesn't require many standards. Web service developers can use XML data format for SOAP but should utilise plain text, HTML and JSON for REST instead.'

2. What are the advantages of SOAP?

Sample Answer: 'The advantage of using SOAP is that it's independent and doesn't rely on any platform or language. SOAP is also easier to use than other web services like RMI and COBRA. You can integrate and use SOAP with other protocols, and it's vendor-neutral.'

3. Can you list the important features of a SOAP envelope element?

Sample Answer: 'SOAP envelope elements have a root envelope element, which is a critical part of the SOAP message. SOAP also appears as the first child of the envelope.'

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4. How many communication protocols can you use to implement a SOAP message?

Sample Answer: 'Communication protocols are protocols that facilitate information exchange across the web. Web service developers can use HTTP to implement SOAP messages and FTP as a transport mechanism. They can also consider using SMTP and BEEP.'

5. What is web service architecture?

Sample Answer: 'There are three layers of web service architecture: service provider, service requester and service registry. The service provider constructs the web service that makes applications accessible online. The service requester represents users of web services, who can contact the web service by submitting an XML request. Lastly, the service registry is the central directory system that enables applications to find web services or developers.'

Related: How to Become a Data Architect (With Role and Requirements)

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