Questions_And_Answers

TOP 10 REST Assured API Automation Interview Questions and Answers
1. What is Rest assured and Why it is used?
--> Rest Assured is one of the most populer java based library which is highly used in API test automation
--> It helps in writing powerful and maintainable tests for RESTful APIs.

2. What is URI, endpoint and query parameter?
https://  regres.in      /api/users  ?   page=2
protocol  URI/base URL   end point       query parameter

3. What are the static imports in Rest Assured and why we need it?
import static io.restassured.RestAssured.*;
import static io.restassured.matcher.RestAssuredMatchers.*;
import static org.hamcrest.Matchers.*;

4. What are the given, when and then methods in Rest-assured?
given()
    .param("page","2")
    .auth().none().
when()
    .get("https://regres.in/api/users").
then()
    .statusCode(200)
    .body("page",equalTo(2));

5. What are the different authentication methods in Rest-assured?
    Basic authentication
    Digest authentication
    Form authentication
    OAuth 1 and OAuth 2

6. How to check Response time for an API?
-->getTime() - The response time in milliseconds.
-->getTimeIn(TimeUnit timeunit) - The response time in the given time unit.
-->time() - The response time in milliseconds.
-->timeIn(TimeUnit timeunit) - The response time in the given time unit.

7. How to send a complex payload for a post API using POJO classes?
Post Url = https://regres.in/api/users
payload
{
    "name":"bahadir",
    "job":"qa engineer",
    "skills":["selenium","java"],
    "details":{
            "companyName":"XYZ",
            "emailId":"bahadir@test.com"
              }
}

8. How to log request and response for a post API?
Response response = PetEndPoints.readPet(createdId);
        response.then().log().all();
        Assert.assertEquals(response.getStatusCode(), 200);

HTTP/1.1 200 OK
Date: Sat, 14 Dec 2024 23:14:04 GMT
Content-Type: application/json
Transfer-Encoding: chunked
Connection: keep-alive
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, DELETE, PUT
Access-Control-Allow-Headers: Content-Type, api_key, Authorization
Server: Jetty(9.2.9.v20150224)

9. How to validate the response of a POST API?

10. How to verify cookie, headers & content-type in API response?
Using below methods.
-->getHeaders()
-->getCookies()
-->getContentType()