Free Interview Questions on Postman| Beginner to Expert

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Interview Questions on Postman for Freshers to Intermediate (Below 4 years of Experience)

Free Interview Questions on Postman| Beginner to Expert Interview Questions on Postman for Freshers to Intermediate (Below 4 years of Experience)

Introduction to Postman

1. Interviewer: What is Postman, and why is it used?
Your Answer: Postman is a collaboration platform for API development. It provides tools for designing, testing, documenting, and monitoring APIs. It is widely used by developers and QA teams to interact with APIs, debug requests, and ensure the functionality of services.

2. Interviewer: What are the key features of Postman?
Your Answer: Key features of Postman include:

  • API request building and testing.
  • Support for multiple HTTP methods (GET, POST, PUT, DELETE, etc.).
  • Collections to organize requests.
  • Environment variables for dynamic testing.
  • Automated testing and scripting with JavaScript.
  • API documentation generation.

3. Interviewer: Is Postman free to use?
Your Answer: Yes, Postman offers a free plan that includes essential features for API testing. Additionally, it provides paid plans with advanced collaboration and API lifecycle management features.

Installing and Setting Up Postman

4. Interviewer: How do you install Postman?
Your Answer: Postman can be installed from its official website for Windows, macOS, and Linux. Additionally, Postman is available as a web version that works in modern browsers.

5. Interviewer: What are the prerequisites for installing Postman?
Your Answer: Postman requires a stable internet connection for downloading and running. It supports Windows 7 and above, macOS 10.10 and later, and Linux distributions with 64-bit architecture.

6. Interviewer: What are Postman environments, and how are they useful?
Your Answer: Environments in Postman allow you to manage environment-specific variables like base URLs, API keys, and tokens. They enable testing APIs across different environments, such as development, staging, and production, without modifying requests manually.

Understanding the Postman Interface

7. Interviewer: What are the main components of the Postman interface?
Your Answer: The main components of the Postman interface include:

  • Request Builder: For creating and sending API requests.
  • Collections: For organizing requests into groups.
  • Environment Manager: For managing variables.
  • Console: For debugging requests and responses.
  • Runner: For running tests in bulk.

8. Interviewer: Where can you view detailed logs of a request?
Your Answer: Detailed logs of a request can be viewed in the Postman Console. It displays information about headers, body, and errors during the request-response cycle.

9. Interviewer: What is the purpose of the History tab?
Your Answer: The History tab in Postman shows a chronological record of all previously sent requests, making it easier to re-execute or modify past requests.

Creating Your First Request

10. Interviewer: How do you create a request in Postman?
Your Answer: To create a request in Postman:

  1. Open the Postman app.
  2. Click on the “New” button or “Request” in a collection.
  3. Select the HTTP method, enter the API endpoint, add any necessary parameters or headers, and click “Send.”

11. Interviewer: How do you save a request in Postman?
Your Answer: To save a request, click on the “Save” button, provide a name, and save it to a collection. Saved requests can be reused and shared later.

12. Interviewer: Can you test APIs that require authentication in Postman?
Your Answer: Yes, Postman supports various authentication methods such as Basic Auth, Bearer Token, OAuth 2.0, and API Key. You can configure authentication settings in the Authorization tab of a request.

Overview of HTTP Methods (GET, POST, PUT, DELETE, etc.)

13. Interviewer: What is the purpose of the GET method?
Your Answer: The GET method is used to retrieve data from a server. It is idempotent and does not modify server resources.

14. Interviewer: How does the POST method differ from GET?
Your Answer: The POST method is used to send data to the server, typically to create or update resources. Unlike GET, it is not idempotent.

15. Interviewer: When would you use the PUT method?
Your Answer: The PUT method is used to update an existing resource or create it if it does not exist. It is idempotent, meaning the result is the same no matter how many times the request is repeated.

16. Interviewer: What does the DELETE method do?
Your Answer: The DELETE method is used to remove a resource from the server.

17. Interviewer: What are idempotent HTTP methods?
Your Answer: Idempotent HTTP methods, such as GET, PUT, and DELETE, produce the same result no matter how many times they are executed.

Understanding Status Codes and Responses

18. Interviewer: What is an HTTP status code?
Your Answer: An HTTP status code is a 3-digit number in the response that indicates the status of the request. Examples include 200 (OK), 404 (Not Found), and 500 (Internal Server Error).

19. Interviewer: What does the 200 status code signify?
Your Answer: The 200 status code signifies that the request was successful, and the server returned the expected data.

20. Interviewer: What does the 400 status code indicate?
Your Answer: The 400 status code indicates a bad request, usually due to invalid syntax or missing parameters in the client’s request.

21. Interviewer: What is the significance of the 401 status code?
Your Answer: The 401 status code means “Unauthorized.” It indicates that the request lacks valid authentication credentials.

22. Interviewer: What does the 500 status code represent?
Your Answer: The 500 status code represents an internal server error, indicating that something went wrong on the server side.

Miscellaneous Questions

23. Interviewer: What is the Postman Collection Runner?
Your Answer: The Collection Runner allows you to execute multiple requests from a collection sequentially or in bulk, often with different input parameters or data.

24. Interviewer: What is a Pre-request Script in Postman?
Your Answer: A Pre-request Script is a JavaScript code snippet that runs before the request is sent. It is commonly used to set dynamic variables or handle authentication.

25. Interviewer: How can you share a collection in Postman?
Your Answer: You can share a collection by generating a shareable link or exporting the collection as a JSON file and sharing it with others.

26. Interviewer: What is the difference between Params and Body in Postman?
Your Answer:

  • Params: Used for query parameters appended to the URL (e.g., ?key=value).
  • Body: Used for sending data in the request payload, commonly in POST and PUT methods.

27. Interviewer: What is the use of variables in Postman?
Your Answer: Variables in Postman help manage dynamic values like API keys, tokens, and base URLs across multiple requests. They reduce repetition and make requests adaptable to different environments.

28. Interviewer: What is the benefit of using the Postman API documentation feature?
Your Answer: Postman’s documentation feature auto-generates and hosts API documentation based on your collections, making it easier to share and collaborate with stakeholders.

29. Interviewer: How do you debug issues in Postman requests?
Your Answer: You can debug issues using the Postman Console, which shows detailed logs of requests and responses, including headers, body, and errors.

30. Interviewer: What is the purpose of response time in Postman?
Your Answer: Response time indicates how long the server took to process the request and return the response. It helps measure API performance.

Chapter 2: Building Requests and Collections

Creating and Managing Requests

1. Interviewer: How do you create a new request in Postman?
Your Answer: To create a new request, click the “New” button in Postman, then select “Request.” Enter the request name, choose the HTTP method (GET, POST, PUT, etc.), and add the endpoint URL. After that, click “Save” to store the request in a collection.

2. Interviewer: Can you save requests in Postman? How?
Your Answer: Yes, you can save requests by clicking the “Save” button. You will be prompted to add the request to a collection or create a new collection. This allows you to reuse and organize your requests efficiently.

3. Interviewer: How can you edit an existing request in Postman?
Your Answer: To edit an existing request, select the request from your collection. Then, modify the request details like the URL, method, headers, or body. Once you’re done, click “Save” to apply the changes.

4. Interviewer: Can you send a request in Postman without saving it?
Your Answer: Yes, you can send a request without saving it. After entering the request details and clicking “Send,” the request will only be temporary unless saved.

5. Interviewer: How do you view the response to a request in Postman?
Your Answer: After sending the request, the response is displayed in the lower section of the Postman window. It includes the response body, status code, headers, and response time.

Using Query Parameters and Headers

6. Interviewer: What are query parameters in Postman?
Your Answer: Query parameters are used to pass additional data in the URL. They are typically appended to the URL in the form of ?key=value. For example, https://api.example.com/data?user=123&limit=10.

7. Interviewer: How do you add query parameters in Postman?
Your Answer: In the “Params” tab of the request, you can add key-value pairs for your query parameters. Postman automatically appends these parameters to the request URL.

8. Interviewer: Can you add headers to a request in Postman?
Your Answer: Yes, headers can be added in the “Headers” tab of the request. You can specify the key (e.g., Content-Type) and the corresponding value (e.g., application/json).

9. Interviewer: How do you add authentication headers in Postman?
Your Answer: Authentication headers can be added in the “Authorization” tab by selecting the authentication method (e.g., Bearer Token) and entering the token value. Alternatively, you can manually add the Authorization header in the “Headers” tab.

10. Interviewer: What are common headers used in API requests?
Your Answer: Common headers include Content-Type (specifying the format of the request body), Authorization (for authentication), Accept (specifying the desired response format), and Cache-Control (to manage caching behavior).

Authentication in Postman (API Keys, OAuth, Basic Auth)

11. Interviewer: What is Basic Authentication, and how is it used in Postman?
Your Answer: Basic Authentication involves sending a username and password in the request header. In Postman, you can select “Basic Auth” from the “Authorization” tab, then enter the credentials, and Postman will handle the encoding.

12. Interviewer: How can you use API keys for authentication in Postman?
Your Answer: API keys can be added as either query parameters or headers. In Postman, you can go to the “Params” tab to add the API key or use the “Headers” tab to specify the key name and value.

13. Interviewer: How does OAuth 2.0 authentication work in Postman?
Your Answer: In Postman, OAuth 2.0 authentication is handled in the “Authorization” tab. You select “OAuth 2.0,” click “Get New Access Token,” and provide the necessary details (e.g., client ID, client secret, and scope). Postman then generates the token for use in the request.

14. Interviewer: What is the difference between API Key and OAuth 2.0 authentication?
Your Answer: API Key authentication involves including a key in the request headers or URL. OAuth 2.0 is a more complex process that involves obtaining access tokens through an authorization flow, which provides more secure and granular access control.

15. Interviewer: What are some use cases for Basic Auth versus OAuth in Postman?
Your Answer: Basic Auth is simple and useful for quick setups or internal APIs. OAuth is more secure and ideal for public APIs where you need fine-grained access control, like when dealing with third-party services.

Building and Managing Collections

16. Interviewer: What is a collection in Postman?
Your Answer: A collection in Postman is a group of API requests organized together. It allows you to store, manage, and share requests, making it easier to test and document APIs.

17. Interviewer: How do you create a collection in Postman?
Your Answer: To create a collection, click the “New” button, select “Collection,” provide a name, and click “Create.” You can then start adding requests to this collection.

18. Interviewer: Can you share a collection in Postman?
Your Answer: Yes, you can share a collection by exporting it as a JSON file or by using Postman’s collaboration features to share it with team members through a workspace.

19. Interviewer: What is the purpose of using folders within collections?
Your Answer: Folders help organize requests within a collection. You can group similar requests into folders for easier navigation and management.

20. Interviewer: How do you organize a large collection of requests in Postman?
Your Answer: You can organize a large collection by using folders to group related requests and adding descriptive names to requests. You can also use tags to further classify and filter requests.

Introduction to Variables (Global, Collection, and Environment)

21. Interviewer: What are variables in Postman, and how are they used?
Your Answer: Variables store dynamic data that can be used in requests, such as base URLs, tokens, and other parameters. Variables can be defined globally, at the collection level, or within specific environments.

22. Interviewer: What is the difference between global and environment variables in Postman?
Your Answer: Global variables are available across all collections and environments, while environment variables are specific to a selected environment (e.g., development, staging, or production). Environment variables provide flexibility for testing APIs across different environments.

23. Interviewer: How do you define a variable in Postman?
Your Answer: To define a variable in Postman, go to the “Environment” or “Globals” tab, click “Add,” and specify the variable name and value. You can reference the variable in requests using the syntax {{variable_name}}.

24. Interviewer: How do you use environment variables in Postman requests?
Your Answer: You can use environment variables by referencing them in the request URL, headers, or body using the {{variable_name}} syntax. When you switch environments, Postman automatically updates the variables.

25. Interviewer: Can you override environment variables in a collection in Postman?
Your Answer: Yes, you can override environment variables by setting them at the collection level. Collection variables take precedence over environment variables if both are defined.

Using Pre-Request Scripts and Tests

26. Interviewer: What is a Pre-request Script in Postman?
Your Answer: A Pre-request Script is a JavaScript code block that runs before a request is sent. It is useful for setting up variables, generating dynamic values, or modifying request headers before execution.

27. Interviewer: How do you write a Pre-request Script in Postman?
Your Answer: To write a Pre-request Script, navigate to the “Pre-request Script” tab of a request. Write your JavaScript code, such as pm.environment.set("token", "12345") to set environment variables before the request.

28. Interviewer: What is the purpose of Postman Tests?
Your Answer: Postman Tests are used to validate the response data from an API request. Tests can check status codes, response times, headers, and body content to ensure the API is working as expected.

29. Interviewer: How do you write a test in Postman?
Your Answer: To write a test, go to the “Tests” tab and use Postman’s built-in JavaScript syntax. For example, pm.test("Status code is 200", function() { pm.response.to.have.status(200); }); checks if the status code is 200.

30. Interviewer: Can you chain requests in Postman using Pre-request Scripts?
Your Answer: Yes, you can chain requests by using Pre-request Scripts to store the output of one request (e.g., a token) and pass it as input for subsequent requests. This is commonly done using environment variables.

Interview Questions and Answers on “Advanced Features in Postman”

Dynamic Variables and Data-Driven Testing

Interviewer: What are dynamic variables in Postman, and how are they used?
Your Answer: Dynamic variables are predefined variables in Postman that can generate random values, such as {{$randomInt}}, {{$randomUUID}}, and {{$timestamp}}. They are used to create unique data for testing without hardcoding values. For example, you can use {{$randomEmail}} to generate a unique email address in your request body.

Interviewer: How do you perform data-driven testing in Postman?
Your Answer: Data-driven testing in Postman involves using external data sources like CSV or JSON files to run the same request with multiple sets of data. You can configure this in the Collection Runner by selecting your file and mapping its variables to the Postman request variables.

Interviewer: Can you explain the purpose of the pm.iterationData.get() function?
Your Answer: The pm.iterationData.get() function retrieves a value from the external data file for the current iteration in a data-driven test. For example, pm.iterationData.get("username") gets the value of the “username” column for the current iteration.

Working with JSON and XML Responses

Interviewer: How can you extract a value from a JSON response in Postman?
Your Answer: To extract a value from a JSON response, you can use the pm.response.json() method. For example, if the response contains { "user": { "id": 123 } }, you can retrieve the ID with pm.response.json().user.id.

Interviewer: How do you validate the structure of a JSON response?
Your Answer: You can validate the structure of a JSON response using JavaScript assertions in the Tests tab. For instance, you can use pm.expect(response).to.have.property('key') or libraries like AJV to perform schema validation.

Interviewer: How can you work with XML responses in Postman?
Your Answer: Postman provides the xml2Json() function to convert XML responses to JSON format. For example, let jsonResponse = xml2Json(responseBody); converts XML to a JSON object, making it easier to work with.

Automating Workflows with Collection Runners

Interviewer: What is the Collection Runner in Postman?
Your Answer: The Collection Runner is a tool in Postman that allows you to execute multiple requests in a collection sequentially. It supports iterations, environment variables, and data files for data-driven testing.

Interviewer: How do you set up pre-request scripts for workflow automation?
Your Answer: Pre-request scripts are written in the Pre-request Script tab of a request. These scripts can set variables, generate tokens, or execute any setup tasks before sending the request. For example, pm.variables.set("authToken", "12345").

Interviewer: How can you ensure conditional execution of requests in a Collection Runner?
Your Answer: Conditional execution can be achieved using postman.setNextRequest() in the Tests tab. For example, if (responseCode === 200) { postman.setNextRequest('Next Request'); }.

Creating Mock Servers

Interviewer: What is a Mock Server in Postman?
Your Answer: A Mock Server in Postman allows you to simulate API responses for testing purposes without depending on the actual backend. It returns predefined responses based on the request configuration.

Interviewer: How do you create a Mock Server in Postman?
Your Answer: To create a Mock Server, go to the Postman app, click “Mock Servers” from the left panel, and select “Create Mock Server.” Define the responses based on the API’s expected behavior and associate them with a collection.

Interviewer: What are some practical use cases of Mock Servers?
Your Answer: Mock Servers are useful when the backend is under development, for testing frontend applications, or when the actual API is not accessible. They also help simulate error scenarios like 404 or 500 responses.

Monitoring APIs with Postman

Interviewer: What is API monitoring in Postman?
Your Answer: API monitoring in Postman involves scheduling automated checks on your API endpoints to ensure their availability, reliability, and performance over time. It can send alerts in case of failures.

Interviewer: How do you set up monitoring for an API?
Your Answer: You can set up monitoring by clicking “Monitor” in the Postman app, selecting a collection to monitor, configuring the environment, and scheduling the frequency of the monitoring runs.

Interviewer: What kind of metrics can you gather from Postman monitors?
Your Answer: Postman monitors provide metrics like response time, status codes, and test results for each API request. These metrics can help identify performance bottlenecks and API errors.

Additional Questions

Interviewer: How can you manage environment variables in a Postman workflow?
Your Answer: Environment variables can be managed in the Manage Environments section. You can set, update, and delete them dynamically using pm.environment.set("key", "value") and pm.environment.unset("key").

Interviewer: How does Postman handle authentication?
Your Answer: Postman supports various authentication methods like Basic Auth, OAuth 1.0 and 2.0, API keys, and Bearer Tokens. Authentication details can be configured in the “Authorization” tab of a request or dynamically through scripts.

Interviewer: How do you debug a failing request in Postman?
Your Answer: Debugging can be done using Postman’s console, which logs the request and response details, including headers, body, and scripts. You can access it by clicking “Console” at the bottom of the Postman app.

Interviewer: What is the difference between Global, Environment, and Collection variables?
Your Answer:

  • Global Variables: Accessible across all collections and requests.
  • Environment Variables: Specific to a selected environment.
  • Collection Variables: Scoped to a particular collection.

Interviewer: How do you write tests in Postman?
Your Answer: Tests are JavaScript code snippets written in the Tests tab of a request. They validate response attributes like status codes, headers, and body. For example, pm.test("Status is 200", () => { pm.response.to.have.status(200); });.

Interviewer: How can you handle rate limiting in Postman?
Your Answer: Rate limiting can be managed by adding delays between requests using pre-request scripts with setTimeout. Additionally, handling status code 429 in tests can ensure retries when the rate limit is hit.

Interviewer: How do you import and export collections in Postman?
Your Answer: Collections can be exported from the “Collections” tab by clicking the ellipsis (…) and selecting “Export.” To import, use the “Import” button in the toolbar and upload the exported file.

Interviewer: What is the use of Postman scripts in testing?
Your Answer: Postman scripts enable automation of tasks like setting variables, chaining requests, and validating responses. They are written in JavaScript in the Pre-request and Tests tabs.

Interviewer: How do you handle errors in Postman tests?
Your Answer: You can handle errors using try-catch blocks in test scripts. For instance:

try {  
  let response = pm.response.json();  
} catch (e) {  
  console.error("Error parsing JSON:", e);  
}

Interviewer: What are Postman Collections, and why are they important?
Your Answer: Collections are groups of API requests organized in folders. They enable easy management, sharing, and execution of multiple requests, making them essential for API testing workflows.

Interviewer: How do you secure sensitive data like API keys in Postman?
Your Answer: Sensitive data should be stored in environment variables with appropriate scoping. Using Postman’s “variable encryption” ensures data security. Avoid hardcoding keys in requests.

Chapter 4: Debugging and Error Handling

Debugging Requests and Responses

1. Interviewer: How do you debug an API request in Postman?
Your Answer:
To debug an API request in Postman:

  • Check the request’s parameters, headers, and body for correctness.
  • Use the Postman Console (View > Show Postman Console) to inspect the raw request and response data.
  • Look at the status code and error message for clues.
  • Compare the failing request with a successful one to identify discrepancies.

2. Interviewer: What are some common reasons for failed API requests?
Your Answer:
Common reasons include:

  • Incorrect URL or endpoint.
  • Missing or incorrect authentication credentials.
  • Invalid headers or payload format (e.g., JSON/XML mismatch).
  • Server-side errors (e.g., 500 Internal Server Error).
  • Rate limits or blocked IPs.

3. Interviewer: How do you approach debugging an unexpected response?
Your Answer:

  • Validate the request’s parameters and payload against API documentation.
  • Check if there are any server issues by consulting server logs (if accessible).
  • Confirm that you have the correct permissions and authentication setup.
  • Test the same API call using different environments or tools.

Postman Console for Troubleshooting

4. Interviewer: What is the Postman Console, and how can it help in debugging?
Your Answer:
The Postman Console is a debugging tool that displays detailed logs of HTTP requests and responses. It helps identify issues such as incorrect headers, payload formats, or network errors by showing raw request data, response data, and console logs from test scripts.

5. Interviewer: How can you log custom debug messages in the Postman Console?
Your Answer:
You can use console.log() in the Pre-request or Test Scripts section to log custom debug messages. For example:

console.log("Payload being sent:", pm.request.body);

6. Interviewer: How do you inspect SSL/TLS handshake issues using the Postman Console?
Your Answer:
Enable SSL verification in Postman settings and use the Postman Console to check for SSL handshake failures. If the handshake fails, the console will log details about the certificate mismatch or other errors.

Error Codes and How to Handle Them

7. Interviewer: How do you handle a 401 Unauthorized error in API testing?
Your Answer:

  • Verify that the authentication credentials (e.g., API key, token) are correct and not expired.
  • Ensure that the proper authorization header is included in the request.
  • If using OAuth, refresh the access token if expired.

8. Interviewer: What steps would you take to troubleshoot a 500 Internal Server Error?
Your Answer:

  • Review the request details to ensure they match the API’s expected format.
  • Check for additional error messages in the response body, if provided.
  • Consult with the backend team to identify server-side issues.
  • Use logs or monitoring tools to trace the issue.

9. Interviewer: What is the difference between 4xx and 5xx error codes?
Your Answer:
4xx error codes indicate client-side issues, such as incorrect requests or unauthorized access. Examples include 400 (Bad Request) and 404 (Not Found).
5xx error codes indicate server-side issues, such as internal errors or unavailable services. Examples include 500 (Internal Server Error) and 503 (Service Unavailable).

Validating Responses with Test Scripts

10. Interviewer: How can you validate a response’s status code in Postman?
Your Answer:
Use the following Test Script:

pm.test("Status code is 200", function () {  
    pm.response.to.have.status(200);  
});

11. Interviewer: How do you validate specific fields in a JSON response?
Your Answer:
You can use JavaScript assertions like this:

pm.test("Name is correct", function () {  
    var jsonData = pm.response.json();  
    pm.expect(jsonData.name).to.eql("John Doe");  
});

12. Interviewer: How can you test the response time of an API?
Your Answer:
You can write a test script to check response time:

pm.test("Response time is less than 200ms", function () {  
    pm.expect(pm.response.responseTime).to.be.below(200);  
});

Managing API Dependencies

13. Interviewer: How do you handle API dependencies in testing workflows?
Your Answer:

  • Use Postman’s Collection Runner to chain requests and pass data using variables.
  • Mock external APIs to isolate dependent services.
  • Use environment variables to switch between dependent APIs in different environments (e.g., staging, production).

14. Interviewer: How can you mock an API in Postman?
Your Answer:
Use Postman’s Mock Server feature:

  • Set up a new Mock Server from the Collections menu.
  • Define request-response pairs based on the API contract.
  • Replace the live API URL with the Mock Server URL in your requests.

15. Interviewer: How do you ensure resilience when an API dependency is down?
Your Answer:

  • Implement retry logic or fallback mechanisms.
  • Use Postman’s pm.sendRequest() in scripts to test alternative endpoints.
  • Mock responses to simulate the dependent service’s behavior during downtime.

Advanced Questions for Experienced Professionals

16. Interviewer: How would you debug an intermittent issue in API responses?
Your Answer:

  • Re-run requests multiple times to observe patterns.
  • Log detailed request/response data in the Postman Console.
  • Use network monitoring tools like Wireshark to trace traffic.
  • Identify any rate-limiting or load-related issues on the server.

17. Interviewer: How do you handle cascading errors caused by dependent APIs?
Your Answer:

  • Use conditional tests in Postman to bypass requests based on failed dependencies.
  • Log errors for analysis and retry failed requests with exponential backoff.
  • Design test scenarios to isolate dependencies and validate individual APIs.

18. Interviewer: What is your approach to handling rate limits during testing?
Your Answer:

  • Use Postman’s setTimeout() function to add delays between requests.
  • Configure rate-limiting headers to simulate throttling scenarios.
  • Implement retry logic to handle 429 Too Many Requests errors.

19. Interviewer: How would you validate API schema during testing?
Your Answer:
Use JSON Schema validation in Test Scripts:

const schema = {  
  type: "object",  
  properties: {  
    name: { type: "string" },  
    age: { type: "number" }  
  },  
  required: ["name", "age"]  
};  
pm.test("Schema is valid", function () {  
  pm.expect(tv4.validate(pm.response.json(), schema)).to.be.true;  
});

20. Interviewer: What tools or techniques would you recommend for debugging complex APIs?
Your Answer:

  • Use Postman’s Collection Runner for end-to-end workflows.
  • Leverage debugging tools like Fiddler or Charles Proxy for network inspection.
  • Integrate Postman with CI/CD pipelines to catch issues early.
  • Use API documentation tools like Swagger or OpenAPI for reference.

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