17 Rest Assured Interview Questions And Answers For Experienced Crack Now

In this article, we will discuss some important Rest Assured interview questions and answers to help you prepare effectively. Rest Assured is a popular Java-based library used for testing RESTful web services. As an experienced professional preparing for a job interview that involves Rest Assured, it is crucial to familiarize yourself with the common interview questions related to this framework.

Rest Assured Interview Questions And Answers For Experienced

1. What is Rest Assured, and how does it work?

Rest Assured is a Java library that simplifies the testing and validation of RESTful web services. It provides an intuitive and fluent API to make HTTP requests and validate responses. Rest Assured supports various HTTP methods such as GET, POST, PUT, DELETE, etc., allowing developers to interact with REST APIs and verify the expected behavior. This is common rest Assured interview question.

2. How do you configure Rest Assured in your project?

To configure Rest Assured, you need to include the necessary dependencies in your project’s build file, such as Maven or Gradle. Rest Assured requires the following dependencies:

<dependency>
  <groupId>io.rest-assured</groupId>
  <artifactId>rest-assured</artifactId>
  <version>{version}</version>
</dependency>
<dependency>
  <groupId>io.rest-assured</groupId>
  <artifactId>json-schema-validator</artifactId>
  <version>{version}</version>
</dependency>

Replace {version} with the specific version of Rest Assured you want to use.

3. How can you send a GET request using Rest Assured?

Rest Assured provides a simple and readable syntax to send a GET request. Here’s an example:

import static io.restassured.RestAssured.*;

Response response = get("https://api.example.com/users/1");

int statusCode = response.getStatusCode();
String responseBody = response.getBody().asString();

// Perform assertions or further processing on the response

4. How can you send a POST request with JSON payload using Rest Assured?

To send a POST request with a JSON payload, you can use the following approach:

import static io.restassured.RestAssured.*;
import io.restassured.http.ContentType;

String requestBody = "{\"name\": \"John Doe\", \"email\": \"[email protected]\"}";

Response response = given()
        .contentType(ContentType.JSON)
        .body(requestBody)
        .post("https://api.example.com/users");

int statusCode = response.getStatusCode();
String responseBody = response.getBody().asString();

// Perform assertions or further processing on the response

5. How do you validate the response received from a Rest Assured request?

Rest Assured provides various methods to validate the response. Some commonly used validation techniques include:

• Checking the status code: response.then().statusCode(200);
• Verifying the response body: response.then().body("name", equalTo("John Doe"));
• Validating JSON Schema: response.then().assertThat().body(matchesJsonSchemaInClasspath("schema.json"));

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6. What is BDD (Behavior-Driven Development) syntax in Rest Assured?

Rest Assured supports the BDD style of test specification, which makes the tests more readable. It uses the “given-when-then” structure to describe the test steps. Here’s an example:

given()
    .contentType(ContentType.JSON)
    .body(requestBody)
when()
    .post("https://api.example.com/users")
then()
    .statusCode(201)
    .body("name", equalTo("John Doe"));

7. How can you extract values from the response using Rest Assured?

Rest Assured provides several methods to extract values from the response, such as:

• Extracting response as a String:

String responseBody = response.getBody().asString();

• Extracting specific values from JSON response:

String firstName = response.path("data[0].first_name");

• Extracting values using JSONPath:

JsonPath jsonPath = response.jsonPath();
String firstName = jsonPath.get("data[0].first_name");

8. How can you perform authentication in Rest Assured?

Rest Assured allows you to handle various authentication mechanisms. Some commonly used methods include: This question is from Rest Assured OAuth2 authentication.

• Basic Authentication:

given().auth().basic(username, password).get(endpoint);

• Digest Authentication

given().auth().digest(username, password).get(endpoint);

• OAuth2 Authentication:

given().auth().oauth2(accessToken).get(endpoint);

9. How can you handle cookies in Rest Assured?

Rest Assured provides methods to handle cookies in your tests. You can extract cookies from a response and send them in subsequent requests. Here’s an example:

• Extracting cookies:

Response response = get(endpoint);
Map<String, String> cookies = response.getCookies();

• Sending cookies in a subsequent request:

given().cookies(cookies).get(endpoint);

10. How can you perform file uploads using Rest Assured?

Rest Assured allows you to upload files as part of your requests. Here’s an example:

given().multiPart("file", new File("/path/to/file")).post(endpoint);

You can specify the file parameter name and the file path to upload. This question topic is Handling cookies and sessions in Rest Assured. This question is from File uploads and downloads with Rest Assured.

11. How can you handle SSL certificates in Rest Assured?

Rest Assured provides options to handle SSL certificates, including accepting all certificates or configuring a custom trust store. Here’s an example:

• Accepting all certificates:

RestAssured.config = RestAssured.config().sslConfig(
   SSLConfig.sslConfig().allowAllHostnames().relaxedHTTPSValidation()
);

Configuring a custom trust store:

RestAssured.config = RestAssured.config().sslConfig(
   SSLConfig.sslConfig().trustStore(trustStorePath, trustStorePassword)
);

12. What are the advantages of using Rest Assured over other testing frameworks?

Rest Assured offers several advantages over other testing frameworks, including:

• Fluent and intuitive API for writing readable test scripts.
• Comprehensive support for RESTful web services testing.
• Built-in capabilities for request and response validation.
• Integration with popular Java testing frameworks like JUnit and TestNG.
• Extensibility through custom filters, authenticators, and request specifications.
• Seamless integration with popular build tools like Maven and Gradle.

This is the question which is in the Rest Assured API testing interview questions.

13. How can you handle dynamic parameters in Rest Assured requests?

Rest Assured provides flexibility to handle dynamic parameters in requests. You can use path parameters or query parameters with placeholders that can be replaced dynamically. Here’s an example:

• Path parameter:

given().pathParam("userId", userId).get("/users/{userId}");

• Query parameter:

given().queryParam("name", name).get("/users");

14. How can you handle timeouts in Rest Assured requests?

Rest Assured allows you to set timeouts for requests using the timeout method. Here’s an example:

given().timeout(5000).get(endpoint);

This sets a timeout of 5 seconds for the request.

15. How can you handle response headers in Rest Assured?

Rest Assured provides methods to extract and validate response headers. Here are a few examples:

• Extracting a specific header value:

String contentType = response.getHeader("Content-Type");

• Validating a header value:

response.then().header("Content-Encoding", "gzip");

16. Can you explain the concept of request and response specifications in Rest Assured?

Request and response specifications in Rest Assured allow you to define reusable configurations for requests and responses. They help in reducing code duplication and improving test maintenance. Request specifications define common settings for requests, such as base URI, headers, and authentication. Response specifications define common validations for responses, such as status codes and response body expectations.

17. How can you handle multiple assertions in a single Rest Assured test?

Rest Assured provides the assertThat method, which allows you to perform multiple assertions in a single test. This question is from Parallel test execution with Rest Assured, Here’s an example:

response.then().assertThat()
   .statusCode(200)
   .body("name", equalTo("John Doe"))
   .body("age", greaterThan(18));

These advanced Rest Assured interview questions will help you further prepare for your interview and showcase your expertise in working with the framework. Remember to practice and understand the underlying concepts behind each question to confidently answer them during your interview. Best of luck!