Most Postman interview questions focus on what Postman does, how to create and test API requests, how collections and environments work, and how to use tests and Newman for automation. If you understand these basics, you can confidently handle most Postman interview questions.<\/p>\n\n\n\n
Beginner-Level Postman Interview Questions<\/strong><\/h2>\n\n\n\n![\"Beginner-Level](\"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2025\/05\/01@2x-1200x630.png\" "\\"\\"")
<\/figure>\n\n\n\nIf you\u2019re just getting started with Postman, interviewers will want to check your understanding of the basics, like how to send a request, use environments, or read a response. These beginner-level questions focus on core concepts and the everyday features you\u2019ll use while testing APIs with Postman.<\/p>\n\n\n\n
1. What is Postman, and why is it used?<\/strong><\/h3>\n\n\n\n![\"What](\"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2025\/05\/02@2x-1200x630.png\" "\\"\\"")
<\/figure>\n\n\n\nPostman<\/a> is a popular tool used for developing, testing, and managing APIs. It provides an intuitive interface that allows developers and QA professionals to interact with APIs without writing code initially. It’s widely adopted across teams for both manual and automated API workflows.<\/p>\n\n\n\nRead More: <\/strong><\/em>How to Use a Postman Tool?<\/em><\/strong><\/a><\/p>\n\n\n\n2. What is an API, and how does Postman interact with it?<\/strong><\/h3>\n\n\n\nAn API (Application Programming Interface) allows two software applications to communicate with each other. APIs expose endpoints that accept requests and return data or perform actions. Postman sends HTTP requests (like GET, POST, PUT, DELETE) to APIs and helps you see the responses directly.<\/p>\n\n\n\n
3. How do you send a GET request using Postman?<\/strong><\/h3>\n\n\n\nGET requests are used to retrieve data<\/strong> from a server. Postman makes it simple.<\/p>\n\n\n\nSteps to send a GET request:<\/strong><\/p>\n\n\n\n\n- Open Postman and select GET<\/strong> from the method dropdown.<\/li>\n\n\n\n
- Enter the API endpoint in the request URL field (e.g., https:\/\/api.example.com\/users).<\/li>\n\n\n\n
- If needed, click on the Params<\/strong> tab to add query parameters.<\/li>\n\n\n\n
- Click Send<\/strong>.<\/li>\n\n\n\n
- View the response status, body, and headers in the response section.<\/li>\n<\/ul>\n\n\n\n
GET requests do not require a body, unlike POST or PUT.<\/p>\n\n\n\n
4. What are Collections in Postman?<\/strong><\/h3>\n\n\n\nCollections are folders that help you group and organize your API requests logically. They make it easier to manage requests, share them with teams, and even automate testing with Collection Runner.<\/p>\n\n\n\n
You May Also Like: Top 100+ Manual Testing Interview Questions and Answers<\/a><\/strong><\/p>\n\n\n\n5. Explain the difference between Params, Headers, and Body in Postman.<\/strong><\/h3>\n\n\n\nWhen you send a request in Postman, you often need to include different kinds of information. Each section serves a different purpose.<\/p>\n\n\n\n
\n- Params (Query Parameters):<\/strong>
<\/strong>Sent as part of the URL (e.g., ?id=123). Common in GET requests.<\/li>\n\n\n\n- Headers:
<\/strong>Metadata like Content-Type, Authorization, or Accept. Instruct the server on how to handle the request.<\/li>\n\n\n\n- Body:
<\/strong>The payload is sent with POST, PUT, or PATCH requests, usually containing JSON, XML, or form data.<\/li>\n<\/ul>\n\n\n\nEach of these sections allows you to customize and control the request behavior.<\/p>\n\n\n\n
6. What is the use of Environments in Postman?<\/strong><\/h3>\n\n\n\nEnvironments<\/strong> allow you to define variables like URLs, API keys, tokens, or user IDs that may change between setups.<\/p>\n\n\n\nHow it helps:<\/strong><\/p>\n\n\n\n\n- Create different environments (e.g., Dev, Staging, Production).<\/li>\n\n\n\n
- Define key-value pairs like baseUrl = https:\/\/dev.api.com.<\/li>\n\n\n\n
- Use variables in requests like {{baseUrl}}\/users.<\/li>\n<\/ul>\n\n\n\n
This makes switching between environments seamless without changing the request manually.<\/p>\n\n\n\n
7. How do you use variables in Postman?<\/strong><\/h3>\n\n\n\nVariables in Postman are used with {{variable_name}} syntax. You can define them in an environment or collection and use them dynamically in the request URL, headers, or body.<\/p>\n\n\n\n
8. What are status codes? What does a 200 or 404 code signify?<\/strong><\/h3>\n\n\n\nHTTP status codes indicate the result of an API request<\/strong>. They are returned by the server in response to the client (Postman) request.<\/p>\n\n\n\nCommon examples:<\/strong><\/p>\n\n\n\n\n- 200 OK:<\/strong> Request succeeded; the server returned the expected result.<\/li>\n\n\n\n
- 201 Created:<\/strong> New resource was successfully created.<\/li>\n\n\n\n
- 400 Bad Request:<\/strong> The request was malformed or had invalid data.<\/li>\n\n\n\n
- 401 Unauthorized:<\/strong> Authentication required or token invalid.<\/li>\n\n\n\n
- 404 Not Found:<\/strong> The requested resource does not exist.<\/li>\n\n\n\n
- 500 Internal Server Error:<\/strong> Something went wrong on the server side.<\/li>\n<\/ul>\n\n\n\n
Understanding these codes is crucial for debugging APIs effectively.<\/p>\n\n\n\n
9. Can Postman be used to test both REST and SOAP APIs?<\/strong><\/h3>\n\n\n\nYes, Postman supports both REST<\/strong> and SOAP<\/strong> APIs.<\/p>\n\n\n\n\n- For REST APIs<\/strong>, Postman provides native support with structured JSON, URL params, and built-in features like testing and documentation.<\/li>\n\n\n\n
- For SOAP APIs<\/strong>, you can:
\n\n- Use the POST<\/strong> method.<\/li>\n\n\n\n
- Set the Content-Type to text\/xml.<\/li>\n\n\n\n
- Add the SOAP envelope in the body.<\/li>\n\n\n\n
- Define headers like SOAPAction.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
Though REST is more commonly used today, knowing how to handle SOAP in Postman adds versatility.<\/p>\n\n\n\n
10. How do you import an API into Postman?<\/strong><\/h3>\n\n\n\nPostman allows importing APIs from multiple sources, saving you time and effort in setting up requests manually.<\/p>\n\n\n\n
Ways to import:<\/strong><\/p>\n\n\n\n\n- Import from a file:<\/strong> Upload a .json, .yaml, .txt, or .csv file (usually a collection or environment file).<\/li>\n\n\n\n
- Import from a link:<\/strong> Paste the link to a public Postman Collection or OpenAPI\/Swagger definition.<\/li>\n<\/ul>\n\n\n\n
This is especially useful when collaborating with teammates or consuming third-party APIs.<\/p>\n\n\n\n
Intermediate-Level Postman Interview Questions<\/strong><\/h2>\n\n\n\n![\"Intermediate-Level](\"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2025\/05\/03@2x-1200x630.png\" "\\"\\"")
<\/figure>\n\n\n\nOnce you\u2019ve mastered the basics, interviewers will dig deeper into how you manage workflows, write scripts, and automate testing. <\/p>\n\n\n\n
These intermediate questions test your hands-on experience with Postman\u2019s more powerful features like chaining requests, environment variables, pre-request\/test scripts, and the Collection Runner.<\/p>\n\n\n\n
11. What is a Pre-request Script in Postman?<\/strong><\/h3>\n\n\n\nPre-request Scripts are blocks of JavaScript<\/a> code that execute before a request is sent. They\u2019re useful for setting up the environment or requesting dynamically.<\/p>\n\n\n\nExample:<\/strong><\/p>\n\n\n\nlet currentTime = new Date().toISOString();<\/code><\/p>\n\n\n\npm.environment.set(\"timestamp\", currentTime);<\/code><\/p>\n\n\n\nThis sets a timestamp variable that can be used in the request body or headers.<\/p>\n\n\n\n
12. What is a Test Script in Postman?<\/strong><\/h3>\n\n\n\nTest Scripts are JavaScript snippets that run after<\/strong> a request is executed. They’re used to validate the response and ensure the API behaves as expected.<\/p>\n\n\n\nKey purposes:<\/strong><\/p>\n\n\n\n\n- Check if status codes are correct.<\/li>\n\n\n\n
- Validate specific values in the response body.<\/li>\n<\/ul>\n\n\n\n
13. How do you chain requests in Postman?<\/strong><\/h3>\n\n\n\nRequest chaining<\/strong> refers to the process of passing data from one request to another.<\/p>\n\n\n\nSteps to achieve this:<\/strong><\/p>\n\n\n\n\n- Extract data from the first request using pm.response.json() or regex.<\/li>\n\n\n\n
- Store it in a variable using pm.environment.set().<\/li>\n\n\n\n
- Use that variable in subsequent requests using {{variableName}}.<\/li>\n<\/ol>\n\n\n\n
This helps simulate multi-step user flows like login \u2192 get profile \u2192 update profile.<\/p>\n\n\n\n
14. What is the Collection Runner?<\/strong><\/h3>\n\n\n\nThe Collection Runner<\/strong> allows you to execute all the requests in a collection sequentially<\/strong>. You can also feed it data (via CSV or JSON) to run the same request multiple times with different inputs.<\/p>\n\n\n\nFind out: 10 Common Limitations in Automation Testing<\/a><\/strong><\/p>\n\n\n\n15. What are Global, Environment, and Local variables?<\/strong><\/h3>\n\n\n\nPostman supports several types of variables to help manage data dynamically.<\/p>\n\n\n\n
Differences:<\/strong><\/p>\n\n\n\n\n- Global variables:<\/strong> Accessible from anywhere in the workspace.<\/li>\n\n\n\n
- Environment variables:<\/strong> Specific to a selected environment (e.g., dev, staging).<\/li>\n\n\n\n
- Local variables:<\/strong> Exist only during the execution of a request or script.<\/li>\n<\/ul>\n\n\n\n
Understanding scope is essential when working with multiple APIs and workflows.<\/p>\n\n\n\n
16. How can you validate the JSON response in Postman?<\/strong><\/h3>\n\n\n\nPostman allows you to test the structure and values<\/strong> of a JSON response using test scripts.<\/p>\n\n\n\nSteps:<\/strong><\/p>\n\n\n\n\n- Parse the response using pm.response.json().<\/li>\n\n\n\n
- Use assertions to validate values using pm.expect().<\/li>\n<\/ol>\n\n\n\n
Example:<\/strong><\/p>\n\n\n\nlet jsonData = pm.response.json();\n\npm.test(\"Check username\", function () {\n\n pm.expect(jsonData.username).to.eql(\"john_doe\");\n\n});<\/code><\/pre>\n\n\n\nThis confirms whether the response contains the expected data, useful in automated tests.<\/p>\n\n\n\n
17. How do you export and share a collection?<\/strong><\/h3>\n\n\n\nPostman lets you easily share your work with teammates or other tools.<\/p>\n\n\n\n
Ways to share:<\/strong><\/p>\n\n\n\n\n- Export as JSON:<\/strong>\n
\n- Right-click the collection \u2192 Export.<\/li>\n\n\n\n
- Choose format (Collection v2.1 recommended).<\/li>\n\n\n\n
- Share the .json file with others.
<\/li>\n<\/ul>\n<\/li>\n\n\n\n - Postman link:<\/strong>\n
\n- Click \u201cShare\u201d on the collection.<\/li>\n\n\n\n
- Generate a public link.<\/li>\n\n\n\n
- Send the URL directly.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
This is often used when collaborating across QA and backend teams or submitting assignments.<\/p>\n\n\n\n
18. How do you handle authentication in Postman?<\/strong><\/h3>\n\n\n\nPostman provides multiple authentication options in the Authorization tab<\/strong>.<\/p>\n\n\n\nSupported types:<\/strong><\/p>\n\n\n\n\n- No Auth<\/strong><\/li>\n\n\n\n
- Basic Auth:<\/strong> Username & password.<\/li>\n\n\n\n
- Bearer Token:<\/strong> Common in REST APIs (e.g., Authorization: Bearer <token>).<\/li>\n\n\n\n
- API Key:<\/strong> Sent as a header or query parameter.<\/li>\n\n\n\n
- OAuth 1.0 \/ 2.0<\/strong><\/li>\n\n\n\n
- NTLM, AWS Signature, Hawk Auth<\/strong><\/li>\n<\/ul>\n\n\n\n
19. What is the Monitor feature in Postman?<\/strong><\/h3>\n\n\n\nMonitors allow you to schedule the execution of collections at regular intervals from Postman’s cloud servers.<\/p>\n\n\n\n
Use cases:<\/strong><\/p>\n\n\n\n\n- Check the uptime and performance of APIs.<\/li>\n\n\n\n
- Run regression tests every few hours.<\/li>\n\n\n\n
- Set up alerts when an API fails or responds slowly.<\/li>\n<\/ul>\n\n\n\n
How it works:<\/strong><\/p>\n\n\n\n\n- Go to the collection \u2192 Click on \u201cMonitor\u201d.<\/li>\n\n\n\n
- Choose frequency (hourly, daily, etc.).<\/li>\n\n\n\n
- Add environment, test thresholds, and email alerts.<\/li>\n<\/ul>\n\n\n\n
<\/figure>\n\n\n\nIf you\u2019re just getting started with Postman, interviewers will want to check your understanding of the basics, like how to send a request, use environments, or read a response. These beginner-level questions focus on core concepts and the everyday features you\u2019ll use while testing APIs with Postman.<\/p>\n\n\n\n
1. What is Postman, and why is it used?<\/strong><\/h3>\n\n\n\n<\/figure>\n\n\n\nPostman<\/a> is a popular tool used for developing, testing, and managing APIs. It provides an intuitive interface that allows developers and QA professionals to interact with APIs without writing code initially. It’s widely adopted across teams for both manual and automated API workflows.<\/p>\n\n\n\nRead More: <\/strong><\/em>How to Use a Postman Tool?<\/em><\/strong><\/a><\/p>\n\n\n\n2. What is an API, and how does Postman interact with it?<\/strong><\/h3>\n\n\n\nAn API (Application Programming Interface) allows two software applications to communicate with each other. APIs expose endpoints that accept requests and return data or perform actions. Postman sends HTTP requests (like GET, POST, PUT, DELETE) to APIs and helps you see the responses directly.<\/p>\n\n\n\n
3. How do you send a GET request using Postman?<\/strong><\/h3>\n\n\n\nGET requests are used to retrieve data<\/strong> from a server. Postman makes it simple.<\/p>\n\n\n\nSteps to send a GET request:<\/strong><\/p>\n\n\n\n\n- Open Postman and select GET<\/strong> from the method dropdown.<\/li>\n\n\n\n
- Enter the API endpoint in the request URL field (e.g., https:\/\/api.example.com\/users).<\/li>\n\n\n\n
- If needed, click on the Params<\/strong> tab to add query parameters.<\/li>\n\n\n\n
- Click Send<\/strong>.<\/li>\n\n\n\n
- View the response status, body, and headers in the response section.<\/li>\n<\/ul>\n\n\n\n
GET requests do not require a body, unlike POST or PUT.<\/p>\n\n\n\n
4. What are Collections in Postman?<\/strong><\/h3>\n\n\n\nCollections are folders that help you group and organize your API requests logically. They make it easier to manage requests, share them with teams, and even automate testing with Collection Runner.<\/p>\n\n\n\n
You May Also Like: Top 100+ Manual Testing Interview Questions and Answers<\/a><\/strong><\/p>\n\n\n\n5. Explain the difference between Params, Headers, and Body in Postman.<\/strong><\/h3>\n\n\n\nWhen you send a request in Postman, you often need to include different kinds of information. Each section serves a different purpose.<\/p>\n\n\n\n
\n- Params (Query Parameters):<\/strong>
<\/strong>Sent as part of the URL (e.g., ?id=123). Common in GET requests.<\/li>\n\n\n\n- Headers:
<\/strong>Metadata like Content-Type, Authorization, or Accept. Instruct the server on how to handle the request.<\/li>\n\n\n\n- Body:
<\/strong>The payload is sent with POST, PUT, or PATCH requests, usually containing JSON, XML, or form data.<\/li>\n<\/ul>\n\n\n\nEach of these sections allows you to customize and control the request behavior.<\/p>\n\n\n\n
6. What is the use of Environments in Postman?<\/strong><\/h3>\n\n\n\nEnvironments<\/strong> allow you to define variables like URLs, API keys, tokens, or user IDs that may change between setups.<\/p>\n\n\n\nHow it helps:<\/strong><\/p>\n\n\n\n\n- Create different environments (e.g., Dev, Staging, Production).<\/li>\n\n\n\n
- Define key-value pairs like baseUrl = https:\/\/dev.api.com.<\/li>\n\n\n\n
- Use variables in requests like {{baseUrl}}\/users.<\/li>\n<\/ul>\n\n\n\n
This makes switching between environments seamless without changing the request manually.<\/p>\n\n\n\n
7. How do you use variables in Postman?<\/strong><\/h3>\n\n\n\nVariables in Postman are used with {{variable_name}} syntax. You can define them in an environment or collection and use them dynamically in the request URL, headers, or body.<\/p>\n\n\n\n
8. What are status codes? What does a 200 or 404 code signify?<\/strong><\/h3>\n\n\n\nHTTP status codes indicate the result of an API request<\/strong>. They are returned by the server in response to the client (Postman) request.<\/p>\n\n\n\nCommon examples:<\/strong><\/p>\n\n\n\n\n- 200 OK:<\/strong> Request succeeded; the server returned the expected result.<\/li>\n\n\n\n
- 201 Created:<\/strong> New resource was successfully created.<\/li>\n\n\n\n
- 400 Bad Request:<\/strong> The request was malformed or had invalid data.<\/li>\n\n\n\n
- 401 Unauthorized:<\/strong> Authentication required or token invalid.<\/li>\n\n\n\n
- 404 Not Found:<\/strong> The requested resource does not exist.<\/li>\n\n\n\n
- 500 Internal Server Error:<\/strong> Something went wrong on the server side.<\/li>\n<\/ul>\n\n\n\n
Understanding these codes is crucial for debugging APIs effectively.<\/p>\n\n\n\n
9. Can Postman be used to test both REST and SOAP APIs?<\/strong><\/h3>\n\n\n\nYes, Postman supports both REST<\/strong> and SOAP<\/strong> APIs.<\/p>\n\n\n\n\n- For REST APIs<\/strong>, Postman provides native support with structured JSON, URL params, and built-in features like testing and documentation.<\/li>\n\n\n\n
- For SOAP APIs<\/strong>, you can:
\n\n- Use the POST<\/strong> method.<\/li>\n\n\n\n
- Set the Content-Type to text\/xml.<\/li>\n\n\n\n
- Add the SOAP envelope in the body.<\/li>\n\n\n\n
- Define headers like SOAPAction.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
Though REST is more commonly used today, knowing how to handle SOAP in Postman adds versatility.<\/p>\n\n\n\n
10. How do you import an API into Postman?<\/strong><\/h3>\n\n\n\nPostman allows importing APIs from multiple sources, saving you time and effort in setting up requests manually.<\/p>\n\n\n\n
Ways to import:<\/strong><\/p>\n\n\n\n\n- Import from a file:<\/strong> Upload a .json, .yaml, .txt, or .csv file (usually a collection or environment file).<\/li>\n\n\n\n
- Import from a link:<\/strong> Paste the link to a public Postman Collection or OpenAPI\/Swagger definition.<\/li>\n<\/ul>\n\n\n\n
This is especially useful when collaborating with teammates or consuming third-party APIs.<\/p>\n\n\n\n
Intermediate-Level Postman Interview Questions<\/strong><\/h2>\n\n\n\n<\/figure>\n\n\n\nOnce you\u2019ve mastered the basics, interviewers will dig deeper into how you manage workflows, write scripts, and automate testing. <\/p>\n\n\n\n
These intermediate questions test your hands-on experience with Postman\u2019s more powerful features like chaining requests, environment variables, pre-request\/test scripts, and the Collection Runner.<\/p>\n\n\n\n
11. What is a Pre-request Script in Postman?<\/strong><\/h3>\n\n\n\nPre-request Scripts are blocks of JavaScript<\/a> code that execute before a request is sent. They\u2019re useful for setting up the environment or requesting dynamically.<\/p>\n\n\n\nExample:<\/strong><\/p>\n\n\n\nlet currentTime = new Date().toISOString();<\/code><\/p>\n\n\n\npm.environment.set(\"timestamp\", currentTime);<\/code><\/p>\n\n\n\nThis sets a timestamp variable that can be used in the request body or headers.<\/p>\n\n\n\n
12. What is a Test Script in Postman?<\/strong><\/h3>\n\n\n\nTest Scripts are JavaScript snippets that run after<\/strong> a request is executed. They’re used to validate the response and ensure the API behaves as expected.<\/p>\n\n\n\nKey purposes:<\/strong><\/p>\n\n\n\n\n- Check if status codes are correct.<\/li>\n\n\n\n
- Validate specific values in the response body.<\/li>\n<\/ul>\n\n\n\n
13. How do you chain requests in Postman?<\/strong><\/h3>\n\n\n\nRequest chaining<\/strong> refers to the process of passing data from one request to another.<\/p>\n\n\n\nSteps to achieve this:<\/strong><\/p>\n\n\n\n\n- Extract data from the first request using pm.response.json() or regex.<\/li>\n\n\n\n
- Store it in a variable using pm.environment.set().<\/li>\n\n\n\n
- Use that variable in subsequent requests using {{variableName}}.<\/li>\n<\/ol>\n\n\n\n
This helps simulate multi-step user flows like login \u2192 get profile \u2192 update profile.<\/p>\n\n\n\n
14. What is the Collection Runner?<\/strong><\/h3>\n\n\n\nThe Collection Runner<\/strong> allows you to execute all the requests in a collection sequentially<\/strong>. You can also feed it data (via CSV or JSON) to run the same request multiple times with different inputs.<\/p>\n\n\n\nFind out: 10 Common Limitations in Automation Testing<\/a><\/strong><\/p>\n\n\n\n15. What are Global, Environment, and Local variables?<\/strong><\/h3>\n\n\n\nPostman supports several types of variables to help manage data dynamically.<\/p>\n\n\n\n
Differences:<\/strong><\/p>\n\n\n\n\n- Global variables:<\/strong> Accessible from anywhere in the workspace.<\/li>\n\n\n\n
- Environment variables:<\/strong> Specific to a selected environment (e.g., dev, staging).<\/li>\n\n\n\n
- Local variables:<\/strong> Exist only during the execution of a request or script.<\/li>\n<\/ul>\n\n\n\n
Understanding scope is essential when working with multiple APIs and workflows.<\/p>\n\n\n\n
16. How can you validate the JSON response in Postman?<\/strong><\/h3>\n\n\n\nPostman allows you to test the structure and values<\/strong> of a JSON response using test scripts.<\/p>\n\n\n\nSteps:<\/strong><\/p>\n\n\n\n\n- Parse the response using pm.response.json().<\/li>\n\n\n\n
- Use assertions to validate values using pm.expect().<\/li>\n<\/ol>\n\n\n\n
Example:<\/strong><\/p>\n\n\n\nlet jsonData = pm.response.json();\n\npm.test(\"Check username\", function () {\n\n pm.expect(jsonData.username).to.eql(\"john_doe\");\n\n});<\/code><\/pre>\n\n\n\nThis confirms whether the response contains the expected data, useful in automated tests.<\/p>\n\n\n\n
17. How do you export and share a collection?<\/strong><\/h3>\n\n\n\nPostman lets you easily share your work with teammates or other tools.<\/p>\n\n\n\n
Ways to share:<\/strong><\/p>\n\n\n\n\n- Export as JSON:<\/strong>\n
\n- Right-click the collection \u2192 Export.<\/li>\n\n\n\n
- Choose format (Collection v2.1 recommended).<\/li>\n\n\n\n
- Share the .json file with others.
<\/li>\n<\/ul>\n<\/li>\n\n\n\n - Postman link:<\/strong>\n
\n- Click \u201cShare\u201d on the collection.<\/li>\n\n\n\n
- Generate a public link.<\/li>\n\n\n\n
- Send the URL directly.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
This is often used when collaborating across QA and backend teams or submitting assignments.<\/p>\n\n\n\n
18. How do you handle authentication in Postman?<\/strong><\/h3>\n\n\n\nPostman provides multiple authentication options in the Authorization tab<\/strong>.<\/p>\n\n\n\nSupported types:<\/strong><\/p>\n\n\n\n\n- No Auth<\/strong><\/li>\n\n\n\n
- Basic Auth:<\/strong> Username & password.<\/li>\n\n\n\n
- Bearer Token:<\/strong> Common in REST APIs (e.g., Authorization: Bearer <token>).<\/li>\n\n\n\n
- API Key:<\/strong> Sent as a header or query parameter.<\/li>\n\n\n\n
- OAuth 1.0 \/ 2.0<\/strong><\/li>\n\n\n\n
- NTLM, AWS Signature, Hawk Auth<\/strong><\/li>\n<\/ul>\n\n\n\n
19. What is the Monitor feature in Postman?<\/strong><\/h3>\n\n\n\nMonitors allow you to schedule the execution of collections at regular intervals from Postman’s cloud servers.<\/p>\n\n\n\n
Use cases:<\/strong><\/p>\n\n\n\n\n- Check the uptime and performance of APIs.<\/li>\n\n\n\n
- Run regression tests every few hours.<\/li>\n\n\n\n
- Set up alerts when an API fails or responds slowly.<\/li>\n<\/ul>\n\n\n\n
How it works:<\/strong><\/p>\n\n\n\n\n- Go to the collection \u2192 Click on \u201cMonitor\u201d.<\/li>\n\n\n\n
- Choose frequency (hourly, daily, etc.).<\/li>\n\n\n\n
- Add environment, test thresholds, and email alerts.<\/li>\n<\/ul>\n\n\n\n
<\/figure>\n\n\n\nPostman<\/a> is a popular tool used for developing, testing, and managing APIs. It provides an intuitive interface that allows developers and QA professionals to interact with APIs without writing code initially. It’s widely adopted across teams for both manual and automated API workflows.<\/p>\n\n\n\n Read More: <\/strong><\/em>How to Use a Postman Tool?<\/em><\/strong><\/a><\/p>\n\n\n\n An API (Application Programming Interface) allows two software applications to communicate with each other. APIs expose endpoints that accept requests and return data or perform actions. Postman sends HTTP requests (like GET, POST, PUT, DELETE) to APIs and helps you see the responses directly.<\/p>\n\n\n\n GET requests are used to retrieve data<\/strong> from a server. Postman makes it simple.<\/p>\n\n\n\n Steps to send a GET request:<\/strong><\/p>\n\n\n\n GET requests do not require a body, unlike POST or PUT.<\/p>\n\n\n\n Collections are folders that help you group and organize your API requests logically. They make it easier to manage requests, share them with teams, and even automate testing with Collection Runner.<\/p>\n\n\n\n You May Also Like: Top 100+ Manual Testing Interview Questions and Answers<\/a><\/strong><\/p>\n\n\n\n When you send a request in Postman, you often need to include different kinds of information. Each section serves a different purpose.<\/p>\n\n\n\n Each of these sections allows you to customize and control the request behavior.<\/p>\n\n\n\n Environments<\/strong> allow you to define variables like URLs, API keys, tokens, or user IDs that may change between setups.<\/p>\n\n\n\n How it helps:<\/strong><\/p>\n\n\n\n This makes switching between environments seamless without changing the request manually.<\/p>\n\n\n\n Variables in Postman are used with {{variable_name}} syntax. You can define them in an environment or collection and use them dynamically in the request URL, headers, or body.<\/p>\n\n\n\n HTTP status codes indicate the result of an API request<\/strong>. They are returned by the server in response to the client (Postman) request.<\/p>\n\n\n\n Common examples:<\/strong><\/p>\n\n\n\n Understanding these codes is crucial for debugging APIs effectively.<\/p>\n\n\n\n Yes, Postman supports both REST<\/strong> and SOAP<\/strong> APIs.<\/p>\n\n\n\n Though REST is more commonly used today, knowing how to handle SOAP in Postman adds versatility.<\/p>\n\n\n\n Postman allows importing APIs from multiple sources, saving you time and effort in setting up requests manually.<\/p>\n\n\n\n Ways to import:<\/strong><\/p>\n\n\n\n This is especially useful when collaborating with teammates or consuming third-party APIs.<\/p>\n\n\n\n Once you\u2019ve mastered the basics, interviewers will dig deeper into how you manage workflows, write scripts, and automate testing. <\/p>\n\n\n\n These intermediate questions test your hands-on experience with Postman\u2019s more powerful features like chaining requests, environment variables, pre-request\/test scripts, and the Collection Runner.<\/p>\n\n\n\n Pre-request Scripts are blocks of JavaScript<\/a> code that execute before a request is sent. They\u2019re useful for setting up the environment or requesting dynamically.<\/p>\n\n\n\n Example:<\/strong><\/p>\n\n\n\n This sets a timestamp variable that can be used in the request body or headers.<\/p>\n\n\n\n Test Scripts are JavaScript snippets that run after<\/strong> a request is executed. They’re used to validate the response and ensure the API behaves as expected.<\/p>\n\n\n\n Key purposes:<\/strong><\/p>\n\n\n\n Request chaining<\/strong> refers to the process of passing data from one request to another.<\/p>\n\n\n\n Steps to achieve this:<\/strong><\/p>\n\n\n\n This helps simulate multi-step user flows like login \u2192 get profile \u2192 update profile.<\/p>\n\n\n\n The Collection Runner<\/strong> allows you to execute all the requests in a collection sequentially<\/strong>. You can also feed it data (via CSV or JSON) to run the same request multiple times with different inputs.<\/p>\n\n\n\n Find out: 10 Common Limitations in Automation Testing<\/a><\/strong><\/p>\n\n\n\n Postman supports several types of variables to help manage data dynamically.<\/p>\n\n\n\n Differences:<\/strong><\/p>\n\n\n\n Understanding scope is essential when working with multiple APIs and workflows.<\/p>\n\n\n\n Postman allows you to test the structure and values<\/strong> of a JSON response using test scripts.<\/p>\n\n\n\n Steps:<\/strong><\/p>\n\n\n\n Example:<\/strong><\/p>\n\n\n\n This confirms whether the response contains the expected data, useful in automated tests.<\/p>\n\n\n\n Postman lets you easily share your work with teammates or other tools.<\/p>\n\n\n\n Ways to share:<\/strong><\/p>\n\n\n\n This is often used when collaborating across QA and backend teams or submitting assignments.<\/p>\n\n\n\n Postman provides multiple authentication options in the Authorization tab<\/strong>.<\/p>\n\n\n\n Supported types:<\/strong><\/p>\n\n\n\n Monitors allow you to schedule the execution of collections at regular intervals from Postman’s cloud servers.<\/p>\n\n\n\n Use cases:<\/strong><\/p>\n\n\n\n How it works:<\/strong><\/p>\n\n\n\n2. What is an API, and how does Postman interact with it?<\/strong><\/h3>\n\n\n\n
3. How do you send a GET request using Postman?<\/strong><\/h3>\n\n\n\n
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4. What are Collections in Postman?<\/strong><\/h3>\n\n\n\n
5. Explain the difference between Params, Headers, and Body in Postman.<\/strong><\/h3>\n\n\n\n
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<\/strong>Sent as part of the URL (e.g., ?id=123). Common in GET requests.<\/li>\n\n\n\n
<\/strong>Metadata like Content-Type, Authorization, or Accept. Instruct the server on how to handle the request.<\/li>\n\n\n\n
<\/strong>The payload is sent with POST, PUT, or PATCH requests, usually containing JSON, XML, or form data.<\/li>\n<\/ul>\n\n\n\n6. What is the use of Environments in Postman?<\/strong><\/h3>\n\n\n\n
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7. How do you use variables in Postman?<\/strong><\/h3>\n\n\n\n
8. What are status codes? What does a 200 or 404 code signify?<\/strong><\/h3>\n\n\n\n
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9. Can Postman be used to test both REST and SOAP APIs?<\/strong><\/h3>\n\n\n\n
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10. How do you import an API into Postman?<\/strong><\/h3>\n\n\n\n
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Intermediate-Level Postman Interview Questions<\/strong><\/h2>\n\n\n\n
<\/figure>\n\n\n\n11. What is a Pre-request Script in Postman?<\/strong><\/h3>\n\n\n\n
let currentTime = new Date().toISOString();<\/code><\/p>\n\n\n\npm.environment.set(\"timestamp\", currentTime);<\/code><\/p>\n\n\n\n12. What is a Test Script in Postman?<\/strong><\/h3>\n\n\n\n
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13. How do you chain requests in Postman?<\/strong><\/h3>\n\n\n\n
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14. What is the Collection Runner?<\/strong><\/h3>\n\n\n\n
15. What are Global, Environment, and Local variables?<\/strong><\/h3>\n\n\n\n
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16. How can you validate the JSON response in Postman?<\/strong><\/h3>\n\n\n\n
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let jsonData = pm.response.json();\n\npm.test(\"Check username\", function () {\n\n pm.expect(jsonData.username).to.eql(\"john_doe\");\n\n});<\/code><\/pre>\n\n\n\n17. How do you export and share a collection?<\/strong><\/h3>\n\n\n\n
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<\/li>\n<\/ul>\n<\/li>\n\n\n\n\n
18. How do you handle authentication in Postman?<\/strong><\/h3>\n\n\n\n
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19. What is the Monitor feature in Postman?<\/strong><\/h3>\n\n\n\n
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