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4.3 (70 reviews)
( 589 Students )
40 Hours


API Testing

Perform REST API Testing with Java, REST API Automation Testing from basic Framework with Java & TestNG. Learn Git, Maven, Jenkins, SOAP, API Testing.
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APIs have become the center of software development, connecting and transferring data and logic across disparate systems and applications. Luckily, testing them can greatly improve the efficiency of your testing strategy as a whole, helping you deliver software faster than ever.

API (Application Programming Interface) is a computing interface which enables communication and data exchange between two separate software systems. Software system that executes an API includes several functions/subroutines that another software system can perform. API defines requests that can be made, how to make requests, data formats that can be used, etc. between two software systems.

API TESTING is a software testing type that validates Application Programming Interfaces (APIs). The purpose of API Testing is to check the functionality, reliability, performance, and security of the programming interfaces. In API Testing, instead of using standard user inputs(keyboard) and outputs, you use software to send calls to the API, get output, and note down the system's response. API tests are very different from GUI Tests and won't concentrate on the look and feel of an application. It mainly concentrates on the business logic layer of the software architecture.

APIs, or Application Programming Interfaces, are the connecting tissue between different systems or layers of an application. Applications often have three layers: a data layer, a service (API) layer, and a presentation (UI) layer. The API layer contains the business logic of an application - the rules of how users can interact with services, data, or functions of the app.  Because the API or service layer directly touches both the data layer and the presentation layer, it presents the sweet spot of continuous testing for QA and Development teams. While traditional testing has been focused on the UI, the advantages of API testing are becoming well known.

Get a Course completion certificate, issued by Uplatz, after successful completion of course.


Course/Topic 1 - Course access through Google Drive

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Objectives Back to Top

Offer access to certain services and provide communication between software components.

Design different test harnesses for the API testing in hand. 

Use command-line scripting tools to evaluate and test APIs. 

Test application programming interfaces to determine their performance, functionality, security, and reliability. 

Analyze Functional Test.


Syllabus Back to Top

API Testing – course curriculum

1. Introduction to JAVA basics

o Objects and Classes

o Control Structure

o Conditional Statements

o OOPs Concepts in Java

o String handling

2. Web Service Basics

o What is web service?

o Web service Example

o Different types of Services: SOAP & REST

3. Setup Environment

o Setup SOAPUI Free Version

o Setup SOAPUI Pro Version

o Free SOAP Web services

o Difference between SOAP and Rest Services

o Advantage of Rest Services over SOAP Services


4. Jump into SOAP UI / ReadyAPI

o What is SOAPUI

o SOAPUI work hierarchy

o First SOAP Test Case/SOAP Request test step

o What is ReadyAPI

o Understanding of ReddyAPI test Steps

5. Properties At Different SOAPUI Level

o Global properties

o Project level property

o TestSuite level property

o TestCase Level Property

6. Test steps in SOAPUI

o Delay Test Step

o Groovy Script test step

o Property test step

o Manual Test Step

o Run Test Case Step

o Assertion Test step

7. Parameterization / Data driver Test Cases

o Data Source-Data source Loop using Grid

o Data Source looping using text file

o Data Source looping using excel file

o Data Sink Step

o Data source Loop using Data sink

8. SOAPUI Utilities

o Extent Reporting

o Data-Driven Framework

o PDF Reporting

9. Reporting in SOAPUI/Pro

10. Command Prompt Execution

o Run Functional suite from the command prompt

o Run Load test suite from the command prompt

11. Groovy Programming-Basic to Advance

o Groovy coding environment setup

o Class and objects

o Groovy Basics

o Groovy Programming KickOFF

o Programming Exercise-Number Swapping

o Groovy Condition Handling

o Programming Exercise-Check Even Odd

o Groovy: Arrays

o Groovy: For Loop

o Groovy: While Loop

o Groovy: For Each Loop

o Programming Exercise: Prime Number

o Programming Exercise: Fibonnaci series

o Groovy String Handling

12. XPATH and XQUERY Assertion

o XPATH Assertion

o XQuery Assertion in soapUI

13. Basics of Restful Services

o What is Web service

o Request and Response

o What is Rest

o HTTP Methods

o Request and Response Methods

14. Using Postman for Testing

o Deploying the Test Application in Tomcat

o Application under Test

o Testing GET endpoint

15. Query Parameter

o Handling the query parameter from code

16. Introduction to Rest Assured

o Introduction to course material

o Setting up the Rest Assured Framework

o Rest assured with BDD Framework

o Coding style

o Understanding of Rest Assured -Behaviour Driven Framework

17. HTTP Get Method using Rest Assured

o Writing GET Method

o Handling Response

o Handling and validating response status code

o Setup using rest assured environment variable

o Creating GET Request with custom headers

o Validating Response Content

o Validating using XMLpath class

o Validating using JsonPath Class

o Handling query parameters

18. HTTP Put and Delete method using Rest Assured

o Writing the PUT method

o Writing Delete Method

19. Working with Twitter API

o Introduction and creating an app for Twitter

o POST-Status-Update on Twitter

o Get the list of followers

o Deleting status update from Twitter wall

of accounts


Certification Back to Top

The API testing Certification ensures you know planning, production and measurement techniques needed to stand out from the competition.

API testing is a type of software testing that involves testing application programming interfaces (APIs) directly and as part of integration testing to determine if they meet expectations for functionality, reliability, performance, and security. Since APIs lack a GUI, API testing is performed at the message layer.

The professionals and graduates want to excel in their chosen areas. It is also well suited for those who are already working and would like to take certification for further career progression.

To keep up-to-date with API testing trends, it’s important to keep learning new skills. There are a lot of testing courses and API testing certifications available online today. who are looking to get ahead with their personal brand in the constantly-evolving digital space.

Uplatz online training guarantees the participants to successfully go through the API testing certification provided by Uplatz. Uplatz provides appropriate teaching and expertise training to equip the participants for implementing the learnt concepts in an organization.

Course Completion Certificate will be awarded by Uplatz upon successful completion of the API testing online course.

Career & Jobs Back to Top

The API testing Associate draws an average salary of $106,080 per year depending on the knowledge and hands-on experience. The API testing Associate job roles are in high demand and make a rewarding career.

The role of API tester is to be involved in the quality assurance stage of software development and deployment. You'll conduct automated and manual tests to ensure the software created by developers is fit for purpose and any bugs or issues are removed within a product before it gets deployed to everyday users.

Note that salaries are generally higher at large companies rather than small ones. Your salary will also differ based on the market you work in.

The following are the job titles:

API Tester

Windowapp/Api Tester

Api Tester withCI

API Automation tester

API Engineer

Interview Questions Back to Top

1) What is API?

API (Application Programming Interface) helps in communication and data exchange between two software systems. API act as an interface between two applications and allows the two software systems communicate with one another. API is a collection of functions which can be executed by another software program.

API works as; it takes a request from the source, takes that request to the database, fetches the request data from the database and returns a response to the source. API takes the requests from the user and gives the response without exposing the internal details. API acts as Abstraction.

Example: Amazon API, Google Map API

2) What is API testing?

API testing is a type of software testing that involves testing APIs directly. API is a part of integration testing to check whether the API meets expectations in terms of functionality, reliability, performance, and security of applications. Multiple API system can performed API testing. In API testing, our primary focus is on Business Logic Layer of the software architecture.

3) What are the types of API testing?

API testing involves the following types of testing:

Unit Testing

Functional Testing

Load Testing

Runtime/Error Detection

Security Testing

UI Testing

Interoperability and WS compliance Testing

Penetration Testing

Fuzz Testing

4) What are the protocols used in API Testing?

Protocols used in API testing are:






5) What are the tools used for API Testing?

Tools used for API testing are:

Parasoft SOAtest


AlertSite API monitoring

6) What is API test environment?

For API the test environment is a quite complex method where the configuration of server and database is done as per the requirement of the software application. API testing does not involve graphical user interface (GUI).

API is checked for its proper functioning after installation.


7) What is API framework?

API framework is described by the config. File which consist of the list of all APIs that are required to be activated and are activated for any particular program run. This is essential as every test run does not require all APIs.

8) What are the limits of API usage?

Many APIs have certain limit set up by the provider. Hence, try to estimate our usage and understand how that will impact the overall cost of the offering.

9) What are the advantages of API testing?

Advantages of API testing are:

Test for core functionality: API testing provides access to the application without the user interface. The core functionality of the application will be tested before the GUI tests. This will help to detect the minor issue which can become bigger during the GUI testing.

Time effective: API testing is less time consuming than GUI testing. Particularly, API test requires less code so it can provide better and faster test coverage compare to GUI test automation. This will reduce the cost for the testing project.

Language Independent: In API testing data is exchange using XML or JSON. These transfer mode are completely language-independent, which allows users to select any code language when adopting automation test service for the project.

Easy Integration with GUI: API tests provide highly integrable tests which is useful to perform functional GUI tests after GUI tests. Simple integration would allow new user accounts to be created within the application before GUI started.

10) What are the principles of an API test design?

Here, are the seven principles of API test design.

Exhaustive Testing: Exhaustive testing is not possible. Instead we need optimal amount of testing which is based on the risk assessment of the application.

Defect Clustering: Defect Clustering states that a small number of modules contain the most of the defect detected. Approximately 80% of the defect found in 20% of the modules. By experience we can identify such risky modules. But this approach has its own problems. If the same tests are repeated over and over again, eventually the same test case will no longer find new bugs.

Pesticide Paradox: Testers cannot depend on existing technique. They must have to look continually to improve the existing method to make testing more effective. But even all these hard work in testing we can never claim our product is bug free. To overcome this, test cases need to be regularly reviewed and revised add new and different test cases to help find more defects.

Q1. What are the payment options?
A1. We have multiple payment options: 1) Book your course on our webiste by clicking on Buy this course button on top right of this course page 2) Pay via Invoice using any credit or debit card 3) Pay to our UK or India bank account 4) If your HR or employer is making the payment, then we can send them an invoice to pay.

Q2. Will I get certificate?
A2. Yes, you will receive course completion certificate from Uplatz confirming that you have completed this course with Uplatz. Once you complete your learning please submit this for to request for your certificate https://training.uplatz.com/certificate-request.php

Q3. How long is the course access?
A3. All our video courses comes with lifetime access. Once you purchase a video course with Uplatz you have lifetime access to the course i.e. forever. You can access your course any time via our website and/or mobile app and learn at your own convenience.

Q4. Are the videos downloadable?
A4. Video courses cannot be downloaded, but you have lifetime access to any video course you purchase on our website. You will be able to play the videos on our our website and mobile app.

Q5. Do you take exam? Do I need to pass exam? How to book exam?
A5. We do not take exam as part of the our training programs whether it is video course or live online class. These courses are professional courses and are offered to upskill and move on in the career ladder. However if there is an associated exam to the subject you are learning with us then you need to contact the relevant examination authority for booking your exam.

Q6. Can I get study material with the course?
A6. The study material might or might not be available for this course. Please note that though we strive to provide you the best materials but we cannot guarantee the exact study material that is mentioned anywhere within the lecture videos. Please submit study material request using the form https://training.uplatz.com/study-material-request.php

Q7. What is your refund policy?
A7. Please refer to our Refund policy mentioned on our website, here is the link to Uplatz refund policy https://training.uplatz.com/refund-and-cancellation-policy.php

Q8. Do you provide any discounts?
A8. We run promotions and discounts from time to time, we suggest you to register on our website so you can receive our emails related to promotions and offers.

Q9. What are overview courses?
A9. Overview courses are 1-2 hours short to help you decide if you want to go for the full course on that particular subject. Uplatz overview courses are either free or minimally charged such as GBP 1 / USD 2 / EUR 2 / INR 100

Q10. What are individual courses?
A10. Individual courses are simply our video courses available on Uplatz website and app across more than 300 technologies. Each course varies in duration from 5 hours uptop 150 hours. Check all our courses here https://training.uplatz.com/online-it-courses.php?search=individual

Q11. What are bundle courses?
A11. Bundle courses offered by Uplatz are combo of 2 or more video courses. We have Bundle up the similar technologies together in Bundles so offer you better value in pricing and give you an enhaced learning experience. Check all Bundle courses here https://training.uplatz.com/online-it-courses.php?search=bundle

Q12. What are Career Path programs?
A12. Career Path programs are our comprehensive learning package of video course. These are combined in a way by keeping in mind the career you would like to aim after doing career path program. Career path programs ranges from 100 hours to 600 hours and covers wide variety of courses for you to become an expert on those technologies. Check all Career Path Programs here https://training.uplatz.com/online-it-courses.php?career_path_courses=done

Q13. What are Learning Path programs?
A13. Learning Path programs are dedicated courses designed by SAP professionals to start and enhance their career in an SAP domain. It covers from basic to advance level of all courses across each business function. These programs are available across SAP finance, SAP Logistics, SAP HR, SAP succcessfactors, SAP Technical, SAP Sales, SAP S/4HANA and many more Check all Learning path here https://training.uplatz.com/online-it-courses.php?learning_path_courses=done

Q14. What are Premium Career tracks?
A14. Premium Career tracks are programs consisting of video courses that lead to skills required by C-suite executives such as CEO, CTO, CFO, and so on. These programs will help you gain knowledge and acumen to become a senior management executive.

Q15. How unlimited subscription works?
A15. Uplatz offers 2 types of unlimited subscription, Monthly and Yearly. Our monthly subscription give you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews each month. Minimum committment is for 1 year, you can cancel anytime after 1 year of enrolment. Our yearly subscription gives you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews every year. Minimum committment is for 1 year, you can cancel the plan anytime after 1 year. Check our monthly and yearly subscription here https://training.uplatz.com/online-it-courses.php?search=subscription

Q16. Do you provide software access with video course?
A16. Software access can be purchased seperately at an additional cost. The cost varies from course to course but is generally in between GBP 20 to GBP 40 per month.

Q17. Does your course guarantee a job?
A17. Our course is designed to provide you with a solid foundation in the subject and equip you with valuable skills. While the course is a significant step toward your career goals, its important to note that the job market can vary, and some positions might require additional certifications or experience. Remember that the job landscape is constantly evolving. We encourage you to continue learning and stay updated on industry trends even after completing the course. Many successful professionals combine formal education with ongoing self-improvement to excel in their careers. We are here to support you in your journey!

Q18. Do you provide placement services?
A18. While our course is designed to provide you with a comprehensive understanding of the subject, we currently do not offer placement services as part of the course package. Our main focus is on delivering high-quality education and equipping you with essential skills in this field. However, we understand that finding job opportunities is a crucial aspect of your career journey. We recommend exploring various avenues to enhance your job search:
a) Career Counseling: Seek guidance from career counselors who can provide personalized advice and help you tailor your job search strategy.
b) Networking: Attend industry events, workshops, and conferences to build connections with professionals in your field. Networking can often lead to job referrals and valuable insights.
c) Online Professional Network: Leverage platforms like LinkedIn, a reputable online professional network, to explore job opportunities that resonate with your skills and interests.
d) Online Job Platforms: Investigate prominent online job platforms in your region and submit applications for suitable positions considering both your prior experience and the newly acquired knowledge. e.g in UK the major job platforms are Reed, Indeed, CV library, Total Jobs, Linkedin.
While we may not offer placement services, we are here to support you in other ways. If you have any questions about the industry, job search strategies, or interview preparation, please dont hesitate to reach out. Remember that taking an active role in your job search process can lead to valuable experiences and opportunities.