API Testing Related Interview Questions -

Introduction – Why API Testing Is Important in Interviews

Modern applications are API-driven. Web applications, mobile apps, microservices, cloud platforms, and third-party integrations all communicate through APIs. Because of this, interviewers across QA, Automation, and SDET roles frequently ask api testing related interview questions to evaluate whether a candidate truly understands how systems interact behind the UI.

API testing has become one of the most important skills in software testing because APIs handle:

Backend communication

Data transfer

Business logic

Authentication

System integrations

Even if the frontend looks correct, backend API failures can break the entire application.

What Interviewers Want to Evaluate

Interviewers use API testing questions to understand whether candidates can think practically about backend systems and real-world application behavior.

They usually evaluate:

Understanding of backend communication

Knowledge of REST and SOAP APIs

Ability to validate responses, data, and business logic

Awareness of negative scenarios and production issues

Understanding of authentication and authorization

Familiarity with tools like:

Postman

SoapUI

Rest Assured

Python requests library

For automation and SDET roles, interviewers may also evaluate:

Automation awareness

Scripting knowledge

API framework understanding

Why API Testing is Important

Modern software systems rely heavily on APIs for communication between services.

Examples:

Mobile apps communicating with backend servers

Payment gateways processing transactions

Social media login integrations

Microservices exchanging data

Cloud-based applications

If APIs fail:

Applications may stop functioning

Data may become inconsistent

Security vulnerabilities may occur

Users may experience failures even when UI appears normal

Because of this, API testing is considered a critical QA skill.

What Is API Testing? (Clear & Simple)

API testing is a type of software testing that validates the functionality, reliability, performance, and security of APIs (Application Programming Interfaces) by sending requests and verifying responses.

Instead of testing the graphical user interface (UI), API testing focuses on backend communication between systems. APIs act as intermediaries that allow different software applications to exchange data and communicate with each other.

API testing verifies whether APIs:

Return correct responses

Process requests accurately

Handle errors properly

Maintain security standards

Perform efficiently under load conditions

Why API Testing Is Important

Modern applications depend heavily on APIs for communication between:

Web applications

Mobile applications

Databases

Third-party services

Cloud platforms

If APIs fail, important business operations may stop functioning properly.

Areas Validated in API Testing

Functional Validation

Checks whether APIs work according to business requirements.

Data Validation

Ensures API responses contain accurate data.

Error Handling

Validates how APIs behave under invalid conditions.

Security Validation

Checks authentication and authorization mechanisms.

Performance Validation

Measures response time and scalability.

Example

Sending a GET request to:

/users/1

and validating whether the correct user details are returned in the response.

Real-Time Scenario

In a banking application, API testing verifies whether account balance APIs return accurate balance information after successful authentication.

REST vs SOAP vs GraphQL (Interview Comparison)

Feature	REST	SOAP	GraphQL
Protocol	HTTP	XML-based	HTTP
Data Format	JSON / XML	XML only	JSON
Performance	Fast	Slower	Optimized
Complexity	Easy	Moderate	Moderate
Usage	Most modern apps	Banking/legacy	Modern apps

Most api testing related interview questions focus on REST, but SOAP basics are still important for enterprise projects.

API Testing Related Interview Questions & Answers (100+)

Section 1: API Fundamentals (Q1–Q20)

1. What is an API?

An API (Application Programming Interface) allows two applications or systems to communicate with each other. APIs act as intermediaries that help software applications exchange data and functionality without exposing internal implementation details.

Example:

A mobile app communicates with a backend server using APIs.

A payment gateway connects to an e-commerce website using APIs.

APIs are widely used in:

Web applications

Mobile applications

Cloud platforms

Third-party integrations

2.What is API testing?

API testing is the process of validating API functionality by checking:

Requests

Responses

Status codes

Headers

Authentication

Business logic

API testing focuses on backend communication rather than frontend UI behavior.

The main goal is to ensure APIs:

Work correctly

Return proper data

Handle errors properly

Meet business requirements

Why is API testing important?

API testing is important because APIs connect multiple systems and services.

A defect in an API can affect:

Mobile applications

Web applications

Third-party integrations

Databases

Payment systems

Benefits of API testing:

Early defect detection

Better backend validation

Faster execution compared to UI testing

Improved application stability

3.API testing vs UI testing?

API Testing

API testing validates backend functionality and communication between systems.

Focus areas:

Business logic

Response validation

Status codes

Data accuracy

Security

UI Testing

UI testing validates frontend behavior and user interactions.

Focus areas:

Buttons

Forms

Navigation

User experience

Key Difference

API testing checks how systems work internally, while UI testing checks how applications behave visually.

4.What types of APIs are commonly tested?

The two most common API types are:

REST APIs

Lightweight

Uses HTTP methods

Usually exchanges JSON data

SOAP APIs

XML-based protocol

Uses strict contracts through WSDL

Common in enterprise applications

5.What is REST?

REST (Representational State Transfer) is a lightweight architectural style used for building APIs.

REST APIs:

Use HTTP methods

Are stateless

Usually exchange JSON data

Common methods:

POST

DELETE

REST APIs are widely used because they are simple, scalable, and fast.

6.What is SOAP?

SOAP (Simple Object Access Protocol) is an XML-based messaging protocol used for communication between systems.

SOAP features:

Strict standards

XML format

WSDL contracts

Strong security support

SOAP is commonly used in:

Banking systems

Enterprise software

Legacy applications

7.What is an endpoint?

An endpoint is a URL representing a specific API resource.

Example:

/users/101

This endpoint may return details of user 101.

Endpoints help applications access API services and resources.

8.What is request payload?

A request payload is the data sent from the client to the server in the API request body.

Example:

{
“name”: “Anita”,
“email”: “anita@test.com”
}

Request payloads are commonly used in:

POST requests

PUT requests

PATCH requests

9.What is response payload?

A response payload is the data returned by the server after processing the request.

Example:

{
“id”: 101,
“name”: “Anita”
}

Response payload validation is an important part of API testing.

10.What is statelessness?

Statelessness means every API request is independent.

The server does not store previous request information.

Each request must contain:

Authentication

Headers

Required parameters

REST APIs are stateless by design.

Benefits:

Better scalability

Easier maintenance

Improved performance

11.What is idempotency?

Idempotency means repeating the same request produces the same result.

Example:

Multiple DELETE requests for the same resource should still result in the resource being deleted.

Idempotent methods:

DELETE

This helps maintain consistency and reliability.

12.What is authentication?

Authentication verifies the identity of a user or system.

It answers:

“Who are you?”

Examples:

Username/password

Tokens

API keys

Authentication protects systems from unauthorized access.

13.What is authorization?

Authorization verifies what actions or resources a user is allowed to access.

It answers:

“What are you allowed to do?”

Example:

Admin users can delete data

Regular users can only view data

14.Common authentication types?

Common authentication methods include:

Basic Authentication

Bearer Token Authentication

API Key Authentication

OAuth Authentication

These methods help secure APIs and protect sensitive data.

15.What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format commonly used in REST APIs.

Example:

{
“id”: 101,
“name”: “Anita”
}

Advantages:

Easy to read

Lightweight

Faster parsing

Human-friendly

16.What is XML?

XML (Extensible Markup Language) is a markup language commonly used in SOAP APIs.

Example:

<user>
<id>101</id>
<name>Anita</name>
</user>

XML supports structured and hierarchical data representation.

17.What is positive testing?

Positive testing verifies API behavior with valid input data.

Example:

Valid login credentials

Correct request payload

Purpose:

Ensure expected functionality works properly

18.What is negative testing?

Negative testing checks how APIs behave with invalid or unexpected input.

Examples:

Invalid credentials

Missing fields

Wrong data types

Purpose:

Verify error handling

Prevent crashes

Improve reliability

19.What is API versioning?

API versioning manages API changes without breaking existing applications.

Example:

/v1/users
/v2/users

Benefits:

Backward compatibility

Safe feature upgrades

Controlled API evolution

HTTP Methods – Interview Must-Know

Method	Purpose
GET	Fetch data
POST	Create data
PUT	Update full resource
PATCH	Update partial resource
DELETE	Remove data

HTTP Status Codes – Very Important

Code	Meaning	Usage
200	OK	Successful request
201	Created	Resource created
204	No Content	Successful delete
400	Bad Request	Invalid input
401	Unauthorized	Invalid authentication
403	Forbidden	No access permission
404	Not Found	Invalid endpoint
409	Conflict	Duplicate data
500	Server Error	Backend failure

Section 2: API Validation & Testing Types

20.What validations are done in API testing?

Common validations include:

Status code validation

Response body validation

Header validation

Schema validation

Response time validation

These validations ensure both technical correctness and business functionality.

21.Is checking status code enough?

No.

A 200 OK response may still contain:

Incorrect data

Missing fields

Wrong business logic

Testers must validate:

Response payload

Business rules

Headers

Data accuracy

22.What is header validation?

Header validation checks whether API headers contain correct information.

Examples:

Authorization

Content-Type

Example:

Content-Type: application/json

23.What is schema validation?

Schema validation verifies whether the API response structure matches the expected format.

It checks:

Field names

Data types

Required fields

This helps maintain API consistency.

24.What is response time testing?

Response time testing measures how quickly APIs respond to requests.

Purpose:

Identify performance issues

Ensure good user experience

Slow APIs may indicate:

Database problems

Heavy server load

Inefficient processing

25.What is smoke testing?

Smoke testing is a basic API health check.

It verifies:

Critical APIs are working

Main functionality is stable

Usually performed after deployments.

26.What is regression testing?

Regression testing ensures existing APIs still work correctly after changes or bug fixes.

Purpose:

Detect unintended side effects

Maintain application stability

27.What is API security testing?

API security testing validates:

Authentication

Authorization

Data protection

Access control

It helps identify vulnerabilities and security risks.

28.What is API performance testing?

API performance testing evaluates:

Speed

Load handling

Scalability

Stability

It checks API behavior under heavy traffic conditions.

29.What is pagination testing?

Pagination testing validates APIs that return data page by page.

Example:

/users?page=1

Checks include:

Correct page size

Proper navigation

No missing or duplicate records

What is filtering testing?

Filtering testing verifies whether query parameters correctly filter data.

Example:

/users?status=active

Only active users should be returned.

30.What is sorting testing?

Sorting testing checks whether responses are ordered correctly.

Examples:

Ascending order

Descending order

Alphabetical sorting

31.What is API chaining?

API chaining means using the response of one API as input for another API.

Example:

Token used in profile API

This validates real user workflows.

32.What is API mocking?

API mocking simulates API behavior without requiring the real backend service.

Benefits:

Faster testing

Early development testing

Independent frontend development

33.What is rate limiting?

Rate limiting restricts the number of API requests allowed within a time.

Purpose:

Prevent abuse

Protect servers

Improve stability

34.What is throttling?

Throttling controls API traffic when request volume becomes excessive.

Purpose:

Prevent backend overload

Maintain performance stability

35.What is boundary value testing?

Boundary value testing checks API behavior using minimum and maximum input values.

Examples:

Minimum password length

Maximum allowed quantity

Helps identify edge-case defects.

36.What is data consistency testing?

Data consistency testing ensures the same data appears correctly across systems and APIs.

Purpose:

Prevent synchronization issues

Maintain data integrity

37.What is API rollback testing?

API rollback testing verifies that no partial data remains if a transaction fails.

Example:

Payment succeeds

Order creation fails

The system should rollback changes to maintain consistency.

38.What is content-type validation?

Content-type validation checks whether APIs use correct data formats.

Examples:

application/json

application/xml

Incorrect content types may cause parsing failures.

39.What is API documentation?

API documentation explains:

Endpoints

Request methods

Parameters

Authentication

Sample requests and responses

Good documentation improves development and testing efficiency.

40.What is Swagger/OpenAPI?

Swagger / OpenAPI is a popular API documentation and specification tool.

Features:

Interactive API documentation

API testing support

Request/response examples

It helps developers and testers understand APIs easily.

41.What is API contract testing?

API contract testing verifies whether the client-server agreement is maintained.

It checks:

Request format

Response structure

Data types

Mandatory fields

This prevents integration failures between systems.

42.What is concurrency testing?

Concurrency testing checks how APIs behave when multiple users access the system simultaneously.

Purpose:

Detect race conditions

Identify data conflicts

Validate system stability

43.What is API caching?

API caching stores API responses temporarily to improve performance.

Benefits:

Faster response time

Reduced server load

Better scalability

Caching improves overall application efficiency.

Real-Time API Validation Example Request

POST /api/login

{
“username”: “testuser”,
“password”: “pass123”
}

Response

{
“token”: “xyz123”,
“expiresIn”: 3600
}

Important Validations in API Testing

When testing this API, testers should validate more than just the status code.

Basic Validations

Status code should be 200

Token should not be null or empty

expiresIn should be greater than 0

Response should be valid JSON

Authentication token should generate correctly

Response time should be acceptable

Why These Validations Matter

Status Code Validation

Confirms whether the request was processed successfully.

Token Validation

Ensures authentication logic is functioning correctly.

expiresIn Validation

Verifies session expiration functionality.

Response Validation

Ensures backend business logic and data are correct.

Postman / SoapUI / Automation Basics

Postman – Simple Test Script

Example:

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

What This Script Does

This script validates whether the API response status code is 200.

Why Beginners Should Learn Postman

Postman helps testers:

Send API requests

Validate responses

Understand request-response flow

Practice real API scenarios

It is one of the most widely used tools in API testing interviews.

SoapUI – XPath Assertion

Example:

//token != “”

What This Assertion Validates

It checks whether the <token> value returned in the XML response is not empty.

Why SoapUI is Used

SoapUI is mainly used for:

SOAP API testing

XML validation

XPath assertions

Basic awareness is usually enough for freshers.

Rest Assured (Java – Basic Awareness)

Rest Assured is a Java library used for API automation testing.

Example:

given()
.when()
.get(“/users/1”)
.then()
.statusCode(200);

What This Code Does

Sends a GET request

Calls the /users/1 endpoint

Validates the response status code

What Interviewers Expect From Freshers

Usually only:

Basic awareness

Understanding that Rest Assured is used for API automation in Java

Advanced framework knowledge is not mandatory initially.

Python Requests (Basic Awareness)

Python provides a simple library called requests for API testing and automation.

Example:

import requests

res = requests.get(url)

assert res.status_code == 200

What This Script Does

Sends a GET request

Stores API response

Verifies the status code

Why Python Requests is Popular

Simple syntax

Beginner friendly

Lightweight API automation

Freshers only need basic awareness in most interviews.

Scenario-Based API Testing Related Interview Questions

1. API returns 200 but wrong data—what do you validate?

I would validate:

Response payload

Database records

Request parameters

Business logic

Data mapping

A successful status code does not guarantee correct functionality.

2. API works in Postman but fails in application—why?

Possible reasons:

Missing headers

Incorrect frontend integration

Authentication mismatch

CORS issues

Different environments

I would compare requests from both systems carefully.

3. Missing parameter returns 500—is it correct?

Usually no.

The API should ideally return:

400 Bad Request

A 500 error often indicates poor backend validation or unhandled exceptions.

4. API allows access without token—what issue?

This is a major security issue.

Possible causes:

Missing authentication validation

Authorization bypass

Improper access control

Sensitive APIs should always validate tokens properly.

5. Duplicate records created—what testing missed?

Possible missing testing:

Duplicate validation testing

Idempotency testing

Concurrency testing

The application should prevent duplicate record creation.

6. API slow for large datasets—what test?

This requires:

Performance testing

Load testing

Scalability testing

I would check:

Response time

Database query efficiency

Pagination support

Server resource usage

7. API returns null values—how validate?

I would verify:

Whether null values are expected

Mandatory field handling

Backend mappings

Database records

Unexpected null values may indicate data or logic issues.

8. Invalid input accepted—what defect?

This is an input validation defect.

Example:

Invalid email accepted

Negative values accepted

Proper validation should reject invalid data with appropriate errors.

9. API returns wrong status code—impact?

Wrong status codes can:

Confuse frontend applications

Break automation scripts

Cause incorrect error handling

Status codes must correctly represent API behavior.

10. Same request gives different responses—why?

Possible reasons:

Dynamic backend data

Caching issues

Session dependency

Concurrency problems

Environment instability

I would investigate backend behavior and data consistency.

11. Unauthorized user accesses data—issue?

This is an authorization defect and a serious security vulnerability.

Possible causes:

Broken access control

Missing role validation

Incorrect permission handling

This can expose sensitive business data.

12. API fails only in production—possible reasons?

Possible reasons:

Environment configuration differences

Production database issues

SSL certificate problems

High server load

Firewall restrictions

Production issues are often environment-specific.

13. API schema changes—what breaks?

Schema changes can break:

Frontend applications

Automation scripts

Client integrations

Third-party systems

Example:

Field name changes

Data type changes

Missing mandatory fields

This is why schema validation and contract testing are important.

14. Partial data saved after failure—what testing needed?

This requires:

API rollback testing

Transaction validation

Example:

Payment succeeds

Order creation fails

The system should rollback incomplete transactions to maintain consistency.

15. API rate limiting not working—impact?

Possible impacts:

Server overload

API abuse

Performance degradation

Security risks

Rate limiting protects systems from excessive traffic and misuse.

How Interviewers Evaluate Your Answers

Interviewers usually look for:

Clear understanding of core concepts

Logical thinking over memorization

Ability to explain practical scenarios

Awareness of negative and edge cases

Confidence and communication clarity

Important Interview Tip

Explaining why something happens is usually more valuable than simply naming tools or definitions.

Interviewers care more about:

Problem-solving ability

Understanding

Practical thinking

than memorized textbook answers.

API Testing Interview Cheatsheet

Important Areas to Focus On

Understand REST API basics

Learn HTTP methods and status codes

Validate response body, not only status code

Practice regularly using Postman

Think about negative testing scenarios

Learn request and response validation

Practice real-world API examples

Keep explanations simple and clear

Most Important Advice

Strong fundamentals and logical thinking are more important than advanced tools for many fresher and intermediate QA interviews.

FAQs – API Testing Related Interview Questions

Q1. Are API testing questions asked for freshers?
Yes, API testing has become very important for freshers in QA/testing roles, especially for manual testers and SDET roles.

Most modern applications are built using APIs, so companies expect even entry-level testers to understand basic API concepts.

Why API Testing is Important for Freshers

APIs Power Modern Applications

Today’s applications depend heavily on APIs for:

Mobile apps

Web applications

Payment systems

Third-party integrations

Because of this, testers need to validate backend communication, not just UI behavior.

Q2. Is Postman enough for interviews?

Yes, Postman is usually enough for beginners and freshers to start learning API testing and clear many entry-level QA interviews.

Why Postman is Enough for Beginners

Postman helps freshers understand core API testing concepts without requiring programming knowledge.

Using Postman, you can learn:

Sending API requests

HTTP methods (GET, POST, PUT, DELETE)

Status code validation

Request headers

Authentication basics

JSON request and response handling

Negative testing scenarios

This builds strong API fundamentals, which interviewers value most for fresher roles.

Q3. Do I need automation knowledge?
For freshers, automation knowledge is helpful but not always mandatory. It depends on the role and company.

For Manual QA Fresher Roles

Usually, basic manual testing + API testing knowledge is enough.

Companies often expect:

Manual testing concepts

SDLC/STLC basics

Bug reporting

Basic SQL

API testing with Postman

In many beginner manual QA interviews, automation is considered an added advantage rather than a strict requirement.

Q4. Biggest mistake candidates make?
1. Memorizing Answers Without Understanding

This is the biggest mistake.

Many candidates memorize:

Definitions

Status codes

Tool commands

But during interviews, they struggle when interviewers ask:

“Why?”

“What if this fails?”

“How would you test this scenario?”

Interviewers care more about logical understanding than textbook definitions.

Better Approach

Understand:

How APIs work

Why validations matter

What real defects look like

2. Validating Only Status Codes

Many beginners think:

“200 means API is working.”

That is incomplete testing.

An API may return:

Wrong data

Missing fields

Incorrect business logic

while still returning 200 OK.

Better Approach

Always validate:

Response body

Business logic

Headers

Error messages

Database impact (if possible)

3. Ignoring Negative Testing

Freshers often test only happy paths.

Example:

Valid login works

But they forget to test:

Invalid passwords

Missing fields

Empty payloads

Unauthorized access

Real bugs are often found in negative scenarios.

Better Approach

Always ask:

“What happens if the user sends invalid data?”

4. Focusing Only on UI Testing

Some beginners test only frontend screens and ignore backend validation.

Modern applications rely heavily on APIs, so backend understanding is very important.

Better Approach

Learn:

API basics

Request/response validation

Postman basics

Even simple API knowledge gives an advantage in interviews.

5. Trying to Learn Too Many Tools Quickly

Many freshers jump into:

Selenium

Automation frameworks

Performance testing

CI/CD

without strong basics.

This creates confusion and weak fundamentals.

Better Approach

Master basics first:

Manual testing

API testing fundamentals

SQL basics

One tool at a time

6. Not Understanding Real-Time Scenarios

Candidates often know definitions but cannot explain practical situations.

Example interview question:

“API returns 200 but wrong data—what will you do?”

Many beginners struggle because they practiced theory only.

Better Approach

Practice:

Scenario-based questions

Real API validations

Defect analysis thinking

7. Fear of Automation

Some freshers think:

“I must know advanced automation immediately.”

That is not true for most beginner roles.

Better Approach

Start small:

Understand automation concepts

Learn simple scripting gradually

Build strong testing logic first

8. Giving Very Complicated Answers

Some candidates try to sound advanced and confuse themselves.

Interviewers usually prefer:

Clear explanations

Simple language

Logical thinking

Better Approach

Explain concepts simply with examples.

Simple and correct answers are better than complicated and unclear answers.

9. Not Practicing Hands-On Testing

Watching tutorials alone is not enough.

Many beginners never:

Send real API requests

Validate responses

Test negative scenarios

Better Approach

Practice regularly using:

Postman

Public APIs

Simple test cases

Hands-on practice builds confidence quickly.

10. Thinking Tools Are More Important Than Logic

Tools change between companies.

Testing fundamentals stay valuable everywhere.

A candidate with strong:

Testing mindset

Validation logic

Problem-solving ability

often performs better than someone who only knows tool syntax.

Q5. How to prepare quickly?
1. Start With Manual Testing Basics

First, understand core QA concepts.

Important Topics

SDLC and STLC

Test case vs test scenario

Bug life cycle

Severity vs priority

Functional testing

Regression testing

Smoke testing

Interview Goal

You should be able to explain:

What testing is

Why testing is important

How defects are identified

Keep explanations simple and practical.

2. Learn API Testing Fundamentals

This is one of the most important areas today.

Focus On

What APIs are

REST basics

HTTP methods:

POST

DELETE

Status codes:

Learn Basic Concepts

Request

Response

Headers

JSON

Authentication

Negative testing

Do not try to learn advanced architecture initially.

3. Practice Using Postman

This gives practical confidence very quickly.

Practice Daily

Send GET requests

Create POST requests

Add headers

Validate responses

Test invalid inputs

Learn Simple Validations

Example:

pm.response.to.have.status(200);

Even basic Postman practice helps a lot in interviews.

4. Prepare Scenario-Based Answers

Interviewers often ask practical questions.

Common Examples

API returns wrong data

Invalid input accepted

Unauthorized access allowed

API slow for large data

Wrong status code returned

Best Strategy

Answer using:

What you would check

Why the issue happens

How you would validate it

This shows logical thinking.

5. Learn Basic SQL

Many QA interviews include simple database questions.

Focus On

SELECT

WHERE

ORDER BY

GROUP BY

JOIN basics

You do not need advanced database knowledge initially.

6. Don’t Ignore Negative Testing

Freshers often test only valid scenarios.

Practice:

Invalid login

Empty fields

Wrong payload

Missing token

Unauthorized access

This improves your testing mindset.

7. Learn Basic Automation Awareness

You do not need advanced automation immediately.

But know:

What automation testing is

Difference between manual and automation testing

Basic idea of Selenium

Basic API automation awareness

This is enough for many fresher interviews.

8. Practice Explaining Answers Out Loud

Many candidates know answers but cannot explain clearly.

Practice:

Speaking slowly

Giving examples

Explaining in simple language

Communication matters a lot in interviews.

9. Focus on Understanding, Not Memorization

Interviewers often ask follow-up questions.

If you only memorize definitions, it becomes difficult to answer deeper questions.

Better Approach

Understand:

Why APIs are tested

Why validations matter

Why errors occur

Why status codes are important

Concept clarity builds confidence.

10. Best Quick Preparation Roadmap

Week 1

Learn:

Manual testing basics

API fundamentals

HTTP methods

Status codes

Week 2

Practice:

Postman

JSON validation

Scenario-based questions

Negative testing

Week 3

Learn:

Basic SQL

Basic automation awareness

Mock interviews

Real interview questions

Introduction – Why API Testing Is Important in Interviews

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