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API Design test questions and answers 2024
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API Design test questions and answers 2024
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API Design test questionsand answers 2024
What is API Testing?
API is a collection of routines, tools, protocols that together are required for
building the software application. Any system software or application software
which consists of multiple APIs can perform Application Programming Interface
(API) testing.
This form of testing includes interaction between various or says multiple APIs as
well as the interaction between API and application program. The procedure
mainly includes making API calls using software and observing system response
after receiving output.
Enlist some common tests that are performed on APIs.
There can be multiple reasons for performing API testing.
Let us see some common test examples, where this form of testing is used to
verify:
Any data structure updated by API which requires proper validation.
Input condition based return values.
Call to another API or if any other event is triggered or some interruption is
raised.
The return values which can also be null or wrong results.
Modification of some resources like an update of the database, process killing,
etc.
What is API test environment?
Setting up a test environment of API is a complex method where the configuration
of the server and database is done as per the requirement of the software
application. Graphical user interface (GUI) is not available in this form of testing.
After installation, API is checked for its proper functioning. In this process initial
environment that invokes API is being set up with a defined set of parameters so
that test results can be examined.
Explain API testing approach.
Mentioned below are the factors which determine the approach:
Write appropriate test cases for the APIs and use testing techniques like
, boundary value analysis, equivalence class, etc. for verifying the functionality.
Verify the calls of the combination of two or more value added parameters.
Define the scope and basic functionality of the API program.
Define the accurate input parameters.
Test case execution and comparison of the results with expected results.
Determining API behavior under conditions like the connection with files, etc.
Explain in brief the different types of output observed of an API.
API is considered as the essential connecting part of this digital world. It basically
resides in the business logic layer where it performs functions like processing
commands, application coordination, initiates logical decisions, etc.
The main consideration is returning correct results under any type of conditions.
Mainly, the output or results observed of an API are divided into three sections as
follows:
Returning the result status values as 'Pass' or 'Fail'.
Result as data or any specific information.
An event where the call to any API function will initiate the call to another API
function.
Enlist some best practices that are followed to make API testing successful.
Performing tests repeatedly defines some best practices for making testing
successful.
Enlisted below are some best practices for API testing:
Test cases should be grouped under category with expected results that happen
consistently and other typical results.
Test cases should include selected parameters as well as API call declarations.
API load tests are performed to determine system application stress.
Maintain the limits of the variables used in the tests as well as avoid 'Test
Chaining'.
To make ease for the testers, API call is being prioritized and call sequencing is
planned.
Every input combination and dependencies are considered for complete test
coverage.
Automation of the test cases, documentation is done as and when required.
What is API framework?
API framework is described by the config file which consists 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.
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