Top 40 SOAP UI Interview Questions and Answers for 2026

By : Elijah Hall Elijah Hall
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SOAP UI Interview Questions and Answers

Preparing for a SOAP UI interview? Time to sharpen your knowledge of APIs, testing frameworks, and automation essentials. The keyword “SOAP UI Interview Questions” becomes a crucial part of understanding how to validate and integrate complex web services effectively.

SOAP UI offers excellent opportunities for testers and developers to showcase their technical expertise, analyzing skills, and domain expertise in API validation. Whether you are a fresher or have 5 years of professional experience, mastering questions and answers related to both basic and advanced concepts can help you crack roles across teams led by managers, seniors, and technical leaders working in the field of service testing.

Based on feedback from over 65 professionals and QA managers, this collection of SOAP UI interview insights covers real-world testing practices, automation workflows, and evaluation criteria used across diverse technical teams. Read more…

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SOAP UI Interview Questions and Answers

1) What is SOAP UI, and why is it used in web service testing?

SOAP UI is an open-source functional testing tool specifically designed for testing SOAP and REST web services. It enables testers to validate APIs through automated and manual testing, verifying both request and response structures. SOAP UI is widely used because it supports multiple protocols, provides graphical test creation, and integrates seamlessly with CI/CD pipelines.

Key Benefits of SOAP UI:

Feature Benefit
Easy GUI Simplifies test design without code
Protocol Support Works with SOAP, REST, JMS, JDBC
Assertions Validates XML/JSON response data
Automation Ready Integrates with Jenkins, Maven
Extensible Supports Groovy scripting for customization

Example: In a financial web application, SOAP UI can test the currency exchange API to ensure accurate data retrieval.

2) Explain the difference between SOAP and REST web services.

SOAP and REST are two different architectural approaches for web service communication. SOAP (Simple Object Access Protocol) uses XML exclusively, while REST (Representational State Transfer) can use multiple formats like JSON, XML, or plain text.

Factor SOAP REST
Protocol Strict, XML-based Flexible, architecture style
Data Format XML only JSON, XML, HTML
Performance Slower due to XML overhead Faster, lightweight
Security WS-Security, high security Relies on HTTPS
Statefulness Stateful or stateless Mostly stateless

Example: For financial transactions requiring high security and strict standards, SOAP is preferred. For mobile or lightweight services, REST is ideal.

3) How can you create a SOAP project in SOAP UI?

Creating a SOAP project is straightforward:

  1. Open SOAP UI → Click “File” → “New SOAP Project”.
  2. Enter the Project Name.
  3. Provide the WSDL URL (Web Services Description Language).
  4. SOAP UI auto-generates requests and responses based on the WSDL.

Example:

If your WSDL URL is https://www.dataaccess.com/webservicesserver/NumberConversion.wso?WSDL, SOAP UI will create request templates for converting numbers to words.

This automation saves setup time and helps verify if the service adheres to defined schemas.

4) What are assertions in SOAP UI?

Assertions validate that the response from a web service matches expected criteria. They are crucial for verifying functionality and data integrity.

Common Assertion Types:

  • Contains / Not Contains: Checks text presence.
  • XPath Match: Validates XML elements.
  • Response SLA: Ensures timely responses.
  • Script Assertion: Uses Groovy for advanced logic.

Example: A tester can use an XPath Match assertion to confirm the tag <status>Success</status> appears in the response, proving correct execution.

5) Describe the different types of properties in SOAP UI.

SOAP UI properties allow parameterization and dynamic data handling. They help reuse data across test steps or projects.

Property Type Description Example
Project Global to all test suites Project URL
Test Suite Shared among test cases Common credentials
Test Case Scoped to one test case Temporary token
Step Used in single test step Response field
Global Accessible across all projects Base API URL

Example usage: ${#Project#BaseURL} references the base URL dynamically during execution.

6) How can you handle dynamic values in SOAP UI requests?

Dynamic values, such as session IDs or timestamps, can be handled using property transfers or Groovy scripting.

  • Use Property Transfer to copy a response field from one step to another.
  • Use Groovy Script to generate random or time-based data.

Example Groovy snippet:

def randomID = Math.abs(new Random().nextInt() % 1000)
testRunner.testCase.setPropertyValue("RandomID", randomID.toString())

This ensures each test run has unique identifiers, improving reliability.

7) What is WSDL, and how does SOAP UI use it?

WSDL (Web Services Description Language) is an XML-based file that defines the structure, operations, and data types of a SOAP web service. SOAP UI uses WSDL files to automatically generate test requests.

Key Components of WSDL:

Element Purpose
<types> Defines data types used
<message> Specifies input/output data
<portType> Lists available operations
<binding> Protocol details
<service> Endpoint information

Example: A WSDL describing a “UserService” might define operations such as AddUser and DeleteUser, which SOAP UI converts into ready-to-run requests.

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8) How can test automation be achieved using SOAP UI?

SOAP UI supports automation via Command-line execution, Groovy scripts, and Jenkins integration.

  • TestRunner CLI: Run tests using command-line arguments.
  • Groovy Scripting: Automate logic within test steps.
  • Jenkins + Maven: Integrate tests into CI/CD pipelines.

Example Command:

testrunner.bat -s"LoginSuite" -c"AuthTest" "C:\SOAPProjects\UserAuth.xml"

This command triggers a specific suite and case without opening the UI.

9) What is the difference between SOAP UI and ReadyAPI?

ReadyAPI (formerly SoapUI Pro) is the commercial, feature-rich version of SOAP UI. It provides advanced features such as data-driven testing, reporting, and enhanced user interface.

Feature SOAP UI (Open Source) ReadyAPI (Pro)
Cost Free Paid
Reporting Basic Advanced dashboards
Data-driven Tests Manual Built-in wizards
Integration Limited Extensive (Jenkins, Git, Jira)
Support Community Professional support

Professionals often start with SOAP UI and upgrade to ReadyAPI for enterprise-scale automation.

10) What are the advantages and disadvantages of using SOAP UI?

SOAP UI’s strength lies in its comprehensive features, but it has some drawbacks too.

Advantages Disadvantages
Open-source and free Slightly heavy on memory
Supports SOAP & REST Learning curve for scripting
Extensible with Groovy UI can lag with large projects
Strong assertion library Limited native reporting

Example: A QA team testing government APIs might prefer SOAP UI for its XML validation capabilities, despite its heavy interface.

11) How do you perform data-driven testing in SOAP UI?

Data-driven testing in SOAP UI allows you to run the same test with multiple sets of input data. This is useful when testing APIs with varying parameters, like different usernames or transaction IDs.

Steps to Implement:

  1. Create a DataSource TestStep.
  2. Connect it to an Excel, CSV, or JDBC data file.
  3. Use property expansions like ${DataSource#Username} in request fields.
  4. Link a DataSource Loop to repeat the test for all records.

Example Scenario: Testing login API with 50 sets of credentials ensures coverage across valid and invalid user data, improving test reliability and efficiency.

12) What are property transfers in SOAP UI and how do they work?

Property Transfers allow testers to pass data dynamically between different test steps or cases. This is essential when responses contain values needed in subsequent requests.

Example Use Case:

After logging in, you receive a SessionID. You can transfer that value automatically to the next API call for authentication.

Steps:

  1. Add a Property Transfer step.
  2. Select the source property (e.g., LoginResponse → SessionID).
  3. Define the target property (e.g., OrderRequest → AuthToken).

This makes test flows dynamic and minimizes hard-coded values.

13) How do you validate responses using XPath and XQuery assertions?

XPath and XQuery assertions are used to extract and validate specific elements or values within XML responses.

Example:

To check if a response contains a “Success” message:

declare namespace ns='http://tempuri.org/';
count(//ns:status[.='Success'])

If the count equals 1, the test passes.

Difference Between XPath and XQuery:

Aspect XPath XQuery
Function Navigate XML nodes Query and manipulate XML
Complexity Simple Advanced
Usage in SOAP UI Common Less frequent

XPath is typically preferred for quick validations, while XQuery is ideal for complex XML comparisons.

14) What is the role of Groovy scripting in SOAP UI?

Groovy scripting enhances SOAP UI’s flexibility by allowing testers to customize logic, automate steps, and handle conditional flows. Groovy can manipulate properties, control test execution, and even parse responses.

Example Use Case:

Auto-generate timestamps for API payloads:

def timestamp = new Date().format("yyyy-MM-dd'T'HH:mm:ss")
testRunner.testCase.setPropertyValue("CurrentTime", timestamp)

This enables dynamic request generation and automated parameter injection.

Benefits:

  • Automates repetitive steps
  • Enables complex assertions
  • Improves test maintainability

15) What are mock services in SOAP UI, and how are they useful?

Mock services simulate real web services, allowing testers to validate applications even when the actual service is unavailable.

Use Cases:

  • Testing client applications before API deployment.
  • Simulating error codes or timeouts.
  • Testing integration points in isolation.

Steps to Create:

  1. Right-click → “New SOAP Mock Service”.
  2. Define operations and responses.
  3. Run the mock to simulate a real endpoint.

Example: If an external payment API is under maintenance, a mock service helps continue functional testing with predefined responses.

16) How do you handle security testing in SOAP UI?

SOAP UI supports testing various security mechanisms, including WS-Security, SSL, and authentication headers.

Common Security Scenarios:

Security Type Example
WS-Security Username Token Add credentials in “Outgoing WS-Security Configurations”
Digital Signatures Attach certificates to requests
HTTPS Use keystore/truststore configuration
OAuth / Basic Auth Add under Authorization tab

Example: To test a secure banking API, you can add a digital signature to validate message integrity and authenticity.

17) How can SOAP UI be integrated into a CI/CD pipeline?

Integration enables continuous API testing as part of software delivery. SOAP UI supports automation via command-line tools and Maven/Jenkins.

Typical Setup:

  • Add SOAP UI project to version control (Git).
  • Use Maven plugin or testrunner.bat to trigger test execution.
  • Configure Jenkins job to run tests post-build.

Example Jenkins Command:

testrunner.bat -r -j -f"C:\Results" "C:\Projects\MyAPI-soapui-project.xml"

This produces JUnit-style reports for easy pipeline integration and monitoring.

18) What are test suites and test cases in SOAP UI?

SOAP UI organizes tests hierarchically to maintain structure and clarity.

Level Description
Project The container for all services and tests
Test Suite Logical group of related test cases
Test Case Collection of steps testing a specific scenario
Test Step Individual operation (e.g., SOAP Request, Assertion)

Example: A “User Management” suite might include test cases like CreateUser, UpdateUser, and DeleteUser.

This modular design supports scalability and reuse across projects.

19) How can you debug failed test cases in SOAP UI?

Debugging in SOAP UI involves analyzing request-response logs, assertion failures, and property mismatches.

Steps:

  1. Enable Raw Request/Response view.
  2. Verify Property Values used in the request.
  3. Check Assertion Logs for mismatches.
  4. Use Groovy Script for debugging output:
    log.info("Response: " + context.response)
  5. Run the test in Step-by-Step mode for granular observation.

Effective debugging helps isolate problems in endpoint configuration, data, or authentication quickly.

20) What are some best practices for using SOAP UI in enterprise projects?

Best Practices:

  1. Maintain separate environments (Dev, QA, Prod) via property sets.
  2. Implement naming conventions for clarity.
  3. Use assertions generously to validate every response.
  4. Automate test runs via CI/CD.
  5. Parameterize requests for reusability.
  6. Store sensitive data (like tokens) securely.
  7. Regularly clean and version-control test projects.

Example: An enterprise may maintain a single master project with multiple environment configurations, minimizing duplication and easing maintenance across microservices.

21) How can SOAP UI be used for load and performance testing?

SOAP UI (and more efficiently, ReadyAPI) supports performance testing through the Load Test feature. It evaluates service behavior under different loads to detect bottlenecks.

Steps:

  1. Create a functional test case.
  2. Right-click → “New LoadTest”.
  3. Define parameters like threads, limit, and duration.
  4. Run and monitor throughput, response time, and error rate.

Load Strategies Available:

Strategy Description
Simple Constant number of threads
Burst Alternates between peak and low loads
Variance Random load simulation
Thread Increasing thread count gradually

Example: Simulating 200 concurrent users calling an “Order API” reveals its latency and stability before production release.

22) What is the difference between functional and non-functional testing in SOAP UI?

Aspect Functional Testing Non-Functional Testing
Purpose Validates API logic & correctness Tests performance, security, scalability
Tool Mode Functional Test Suite LoadTest or SecurityTest
Example Validate login API returns token Measure response under 500 users

SOAP UI supports both, allowing testers to reuse functional tests as load or security tests for full coverage.

23) How do you generate and analyze reports in SOAP UI and ReadyAPI?

In SOAP UI open-source, reports are basic and text-based, while ReadyAPI offers rich HTML and JUnit-style reports.

For SOAP UI (CLI):

testrunner.bat -r -j -f"C:\Reports" "Project.xml"

For ReadyAPI:

  • Built-in “Report” tab provides Summary, Statistics, and Assertion views.
  • Reports can be exported in PDF, CSV, or HTML formats.

Tip: Integrate reports into CI dashboards (like Jenkins or Allure) for continuous visibility.

24) How do you test SOAP headers and attachments in SOAP UI?

SOAP headers often contain metadata like authentication tokens, and attachments are used for binary data transfer.

Testing Headers:

  • Add headers in the request editor under the “Headers” tab.
  • Use property expansions for dynamic values: ${#Project#AuthToken}.

Testing Attachments:

  • Right-click request → “Add Attachment”.
  • Select file (e.g., image, PDF).
  • Ensure the MIME type is correct.

Example: Uploading a document via a SOAP service can be tested by attaching .pdf files and validating the server’s response for success codes.

25) What are custom assertions, and how are they implemented in SOAP UI?

Custom assertions allow advanced validations using Groovy scripts when built-in assertions are insufficient.

Example:

def response = context.response
assert response.contains("200 OK")

Benefits:

  • Complex conditional checks
  • Dynamic pattern matching
  • Greater control over pass/fail logic

They are commonly used for validating dynamic responses, such as date formats or random IDs.

26) What are some common challenges in SOAP UI testing, and how do you overcome them?

Challenge Cause Solution
WSDL errors Invalid or outdated endpoint Re-import or refresh WSDL
Dynamic tokens Authentication changes frequently Use Groovy scripting
Test maintenance Large project with many tests Use property files and templates
Performance lag High data volume Use ReadyAPI with memory tuning

Example: When APIs change their schema, refreshing the WSDL avoids broken bindings in existing projects.

27) Can SOAP UI interact with databases, and how?

Yes, SOAP UI can test and validate database integration using JDBC TestSteps.

Steps:

  1. Add a JDBC Request.
  2. Configure the connection string (e.g., MySQL, Oracle).
  3. Enter SQL query.
  4. Use assertions to validate query results.

Example:

SELECT username FROM users WHERE status='ACTIVE';

This can confirm whether an API call correctly updates or inserts data into a database.

28) How can you use environment switching in SOAP UI projects?

Environment switching simplifies testing across multiple stages (Dev, QA, UAT, Prod) without altering test configurations.

Steps:

  1. Define environments under “Environments” tab.
  2. Assign different endpoint URLs per environment.
  3. Use environment-level properties dynamically.

Example:

https://dev.api.company.com (Dev)

https://qa.api.company.com (QA)

Switching environments ensures seamless testing without manual reconfiguration, promoting CI/CD consistency.

29) What is the difference between SOAP Fault and HTTP Error in SOAP UI?

Type Origin Description Example
SOAP Fault Application level Defined in the SOAP body <faultcode>Server</faultcode>
HTTP Error Transport level Occurs at HTTP protocol level 404, 500 status codes

Example:

A malformed XML request causes a SOAP Fault, while a bad endpoint URL triggers an HTTP 404 error.

Understanding this distinction helps isolate issues quickly during debugging.

30) What future trends are influencing SOAP UI and API testing tools?

API testing is evolving with AI, cloud-native, and hybrid frameworks. SOAP UI, while mature, continues to adapt.

Emerging Trends:

  1. Shift to API-first development — integrating early API tests.
  2. AI-driven test generation — predictive validation and coverage.
  3. Cloud-based execution — distributed test runs.
  4. Enhanced CI/CD integration — real-time reporting dashboards.
  5. Hybrid testing tools — combining SOAP, REST, and GraphQL in one platform.

Example: ReadyAPI and tools like Postman or Katalon now leverage AI to auto-suggest assertions and detect anomalies—showing the future of API validation.

31) How do you simulate timeouts and error codes in mock services?

Mock services in SOAP UI allow testers to simulate various server behaviors — including delays, timeouts, and specific HTTP or SOAP error responses.

This helps test client-side resilience and error handling before the real API is live.

Steps:

  1. Create or open a SOAP Mock Service.
  2. Add a Mock Response.
  3. Set an HTTP Status Code (e.g., 500, 404) under the Response Editor.
  4. To simulate delay: set the Dispatch Delay (ms) — e.g., 5000 to delay for 5 seconds.

Example: Simulating a 504 Gateway Timeout helps verify if your client application retries or fails gracefully under high latency.

32) What are the key differences between ReadyAPI modules (SoapUI Pro, LoadUI, and Secure)?

ReadyAPI is SmartBear’s commercial suite built on top of SOAP UI. It consists of specialized tools for complete API lifecycle testing.

Module Purpose Example Use
SoapUI Pro Functional & data-driven API testing Test SOAP/REST APIs with real-time data
LoadUI Load and performance testing Simulate 1000+ virtual users
Secure Security & penetration testing Test for SQL Injection, XML bomb attacks
ServiceV API virtualization Create advanced mock services

Example: A tester may create tests in SoapUI Pro, reuse them in LoadUI for performance testing, and then run Secure to verify endpoint robustness.

33) How do you integrate SOAP UI with Git for version control?

SOAP UI projects are XML-based, making them suitable for source control systems like Git.

Steps:

  1. Save the SOAP UI project as an external .xml file (not internal workspace).
  2. Initialize a Git repository in the project folder: 
    git init
git add .
git commit -m "Initial SOAP UI project commit"
  3. Push to a remote repository: 
    git remote add origin <repo-url>
git push -u origin main
  4. Collaborators can pull and update project changes.

Tip: Use consistent naming conventions and avoid large binary attachments to prevent merge conflicts.

34) How do you verify XML schema compliance in SOAP UI responses?

XML schema compliance ensures that a SOAP service response follows its defined WSDL or XSD structure.

Steps:

  1. Add an XPath Match Assertion or Schema Compliance Assertion.
  2. SOAP UI automatically validates the response XML against the schema.
  3. You can also attach a custom .xsd file under Assertions → Schema Compliance.

Example:

If a response returns <price>ABC</price> while the XSD defines price as a decimal, SOAP UI flags a validation error.

Advantages:

  • Prevents malformed XML responses.
  • Ensures consistent API behavior across environments.

35) What performance metrics can be monitored during a LoadTest?

SOAP UI and ReadyAPI display multiple real-time metrics that help identify performance issues.

Metric Description
Throughput Number of requests per second
Response Time (Avg/Max) How long responses take
Error Count Number of failed requests
Bytes Sent/Received Data volume transferred
Memory Usage Resource footprint of test execution

Example: A sudden spike in error count or response time indicates backend stress or service throttling, prompting infrastructure tuning.

36) How do you execute parameterized tests via command line in Jenkins?

Running SOAP UI tests in Jenkins with parameters allows environment-based automation (e.g., switching between QA and Prod).

Steps:

  1. Store parameters in a property file (e.g., config.properties).
  2. Reference them in test steps using ${#Global#VariableName}.
  3. Execute via command:
    testrunner.bat -Penv=QA -r -j "Project.xml"
  4. Configure Jenkins to accept environment variables (e.g., $BUILD_ENV).

Example: This allows automated execution with dynamic URLs like https://qa.api.company.com or https://prod.api.company.com.

37) What are key factors affecting SOAP UI execution speed?

Several factors influence how quickly SOAP UI executes tests, especially in large enterprise projects.

Factor Impact Optimization
Large XML payloads Slower parsing Use JSON or smaller requests
Heavy assertions Increases validation time Optimize or reduce checks
Logging enabled Slows test runs Disable debug logs
System memory Impacts stability Allocate higher heap space
External dependencies Delays responses Use mock services

Example: Allocating -Xmx1024m in the SOAP UI vmoptions file can significantly improve execution speed for large projects.

38) How do you configure SSL certificate authentication in SOAP UI?

Many APIs require SSL/TLS authentication using digital certificates.

Steps:

  1. Obtain .pfx or .jks certificate file.
  2. Go to File → Preferences → SSL Settings.
  3. Add KeyStore path and password.
  4. Attach certificates under Project Properties → SSL Settings.

Example: For a banking service API, uploading the client certificate allows secure communication over HTTPS with mutual authentication.

Tip: If you encounter javax.net.ssl.SSLHandshakeException, verify certificate validity and intermediate CA chain.

39) How do you build reusable test templates for multiple APIs?

Reusable test templates save time and ensure consistency across projects.

Best Practices:

  1. Use Project-level properties for base URLs and credentials.
  2. Create generic test cases (e.g., Login, Token Generation).
  3. Store reusable steps as Test Case Templates.
  4. Import them into other projects using File → Import Test Suite.

Example: A login and token retrieval flow can be reused across 10 microservices without redefining the same steps.

Benefit: Improves maintainability and reduces duplication across teams.

40) What are the main differences between SOAP UI, Postman, and JMeter for API testing?

Each tool serves a distinct purpose in the API testing ecosystem.

Tool Focus Area Strength Limitation
SOAP UI SOAP & REST Functional Testing Advanced assertions, Groovy scripting Heavy interface
Postman RESTful APIs & Collections Easy UI, team collaboration Limited SOAP support
JMeter Performance & Load Testing Scalability, CI integration Weak functional testing

Example: A QA team may use SOAP UI for functional validation, Postman for exploratory testing, and JMeter for performance benchmarking — leveraging each tool’s strength.

🔍 Top SOAP UI Interview Questions with Real-World Scenarios & Strategic Responses

1) What is SOAP UI, and how is it used in API testing?

Expected from candidate: The interviewer wants to confirm your foundational understanding of the tool and how it fits into the API testing ecosystem.

Example answer: SOAP UI is an open-source testing tool used to test SOAP and REST APIs. It allows users to perform functional, regression, and load testing. Testers can create complex scenarios using its graphical interface, execute test cases, validate responses, and integrate it with CI/CD tools like Jenkins for automation.

2) How do you create a SOAP project in SOAP UI?

Expected from candidate: They want to see if you are familiar with basic project setup steps.

Example answer: To create a SOAP project, I import the WSDL file by selecting “New SOAP Project” and providing the WSDL URL or local file path. SOAP UI automatically generates service requests based on the definitions. Then, I configure endpoints, add test cases, and define assertions for validation.

3) What is the purpose of assertions in SOAP UI, and how do you use them?

Expected from candidate: The interviewer is testing your ability to validate responses effectively.

Example answer: Assertions in SOAP UI are used to verify that the response from the API meets the expected results. I typically use assertions like “Contains,” “XPath Match,” and “Response SLA.” For example, if an API response must include a specific status code, I add an assertion to ensure the response contains the expected value.

4) Can you explain how SOAP UI supports data-driven testing?

Expected from candidate: They are evaluating your experience with parameterization and testing scalability.

Example answer: SOAP UI supports data-driven testing through external data sources like Excel files, CSVs, or databases. I connect the data source to the test case, map the columns to request parameters, and run multiple iterations using different datasets. This approach helps test various input combinations efficiently.

5) Describe a challenging issue you faced while testing an API with SOAP UI and how you resolved it.

Expected from candidate: They want to gauge your problem-solving and troubleshooting skills.

Example answer: At my previous job, I encountered a situation where a SOAP service was returning inconsistent XML responses due to namespace conflicts. I resolved it by updating the XPath expressions in the assertions to handle dynamic namespaces and coordinated with the development team to correct the WSDL definitions.

6) How do you handle authentication in SOAP UI for secured APIs?

Expected from candidate: The interviewer wants to see your familiarity with secure API testing methods.

Example answer: SOAP UI supports several authentication methods such as Basic, NTLM, OAuth, and WS-Security. For SOAP services, I typically use WS-Security headers to include username tokens and encryption settings. For REST APIs, I configure OAuth 2.0 tokens or API keys in the request properties.

7) How do you integrate SOAP UI with CI/CD tools for automated testing?

Expected from candidate: They are assessing your automation and DevOps integration experience.

Example answer: In my last role, I integrated SOAP UI tests with Jenkins by using the command-line tool “testrunner.bat.” I configured build jobs to execute test suites automatically and generate reports. This setup allowed continuous validation of API endpoints during each code deployment cycle.

8) What is the difference between SOAP UI and ReadyAPI?

Expected from candidate: They want to check your understanding of the tool suite ecosystem.

Example answer: SOAP UI is the open-source version focused mainly on functional testing, while ReadyAPI (formerly known as SOAP UI Pro) is the commercial version that adds advanced features like data-driven testing, reporting, and environment management. ReadyAPI is better suited for enterprise-level API testing.

9) How do you test RESTful APIs using SOAP UI?

Expected from candidate: They are testing your versatility across API types.

Example answer: Although SOAP UI was originally designed for SOAP services, it also supports REST APIs. To test RESTful APIs, I create a REST project, specify the endpoint, and define methods such as GET, POST, PUT, or DELETE. Then, I add parameters, headers, and assertions to validate JSON responses.

10) How do you ensure the reusability and maintainability of your SOAP UI test cases?

Expected from candidate: The interviewer is evaluating your approach to scalable and efficient test design.

Example answer: In my previous role, I organized test suites into modular structures where common test steps were stored as reusable test cases. I used properties and environment variables to manage dynamic data. This made maintenance easier when endpoints or parameters changed across environments.

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