Deloitte Sdet (Software Development Engineer in Test) Interview Questions and Answers

I have worked on various projects focusing on automation testing, performance testing, and continuous integration in diverse environments.

• Developed automated test scripts using Selenium for a web application, improving test coverage by 40%.

• Implemented performance testing using JMeter to identify bottlenecks in a financial application, resulting in a 30% increase in response time.

• Collaborated with developers to integrat...read more

Values can be sent without using sendkeys method by directly manipulating the DOM or using JavaScriptExecutor.

• Use JavaScriptExecutor to execute JavaScript code to set values of input fields.

• Find the element using appropriate locators and then use JavaScriptExecutor to set the value.

• Example: driver.executeScript("document.getElementById('elementId').value='text'");

Collections used in Selenium include List, Set, and Map.

• List is used to store a collection of elements in a specific order.

• Set is used to store a collection of unique elements.

• Map is used to store a collection of key-value pairs.

• Examples include List<WebElement>, Set<String>, and Map<String, Object>.

The windowHandles method returns a set of window handles as a set of strings.

• The windowHandles method is used to retrieve all the window handles of the current session.

• The return type is set because it ensures that each window handle is unique and there are no duplicates.

• The set data structure allows for efficient retrieval and manipulation of window handles.

• Example: Set<String> handles = driver.getWindowHandles(...read more

Test cases can be prioritized in TestNG using priority attribute.

• Add priority attribute to @Test annotation

• Test cases with lower priority value will be executed first

• Priority can be any integer value, default is 0

Parallel testing can be achieved by dividing test cases into smaller chunks and running them simultaneously on multiple machines.

• Divide test cases into smaller chunks

• Use a test framework that supports parallel testing

• Run tests on multiple machines or virtual machines

• Ensure tests do not interfere with each other

• Aggregate test results from all machines

Failed test cases can be rerun in TestNG using the 'rerun-failed.xml' file.

• Create a new XML file named 'rerun-failed.xml'

• Add the failed test cases to the XML file using the 'include' tag

• Run the 'rerun-failed.xml' file using TestNG

Test automation framework can be implemented by following these steps:

• Identify the testing requirements

• Choose the appropriate tools and technologies

• Design the framework architecture

• Develop and integrate the framework components

• Create test scripts and execute them

• Integrate with CI/CD pipeline

• Maintain and update the framework regularly

HTTP is a protocol for transmitting data over the internet, while HTTPS is a secure version of HTTP that encrypts the data.

• HTTP stands for Hypertext Transfer Protocol, while HTTPS stands for Hypertext Transfer Protocol Secure.

• HTTP operates on port 80, while HTTPS operates on port 443.

• HTTP is not secure and data is transmitted in plain text, while HTTPS uses SSL/TLS encryption to secure the data transmission.

• HTTPS is co...read more

Rest-assured is a Java-based library used for testing RESTful APIs.

• Rest-assured simplifies the testing of RESTful APIs by providing a domain-specific language (DSL) for writing tests.

• To handle certificate issues in rest-assured, we can use the relaxedHTTPSValidation() method to bypass SSL certificate validation.

• We can also import the certificate into the truststore and use it for SSL validation.

requestSpecification is a class in RestAssured library used to define the request details for API testing.

• It is used to set the base URI, path, headers, query parameters, etc. for the API request.

• It allows customization of the request before sending it.

• Serialization is the process of converting an object into a format that can be stored or transmitted.

• In API testing, serialization is used to convert Java objects into J...read more

Status codes are used in API's to indicate the outcome of a request.

• Status codes are three-digit numbers that are returned by the server in response to a client's request.

• They indicate whether the request was successful or not, and if not, what went wrong.

• Some common status codes include 200 (OK), 404 (Not Found), and 500 (Internal Server Error).

To post a value in a server, you need to consider the endpoint, request method, headers, body, and authentication.

• Identify the endpoint where the value needs to be posted

• Choose the appropriate request method (e.g., POST)

• Set the necessary headers (e.g., Content-Type)

• Construct the body payload with the value to be posted

• Handle authentication if required (e.g., API key, token)

Common exceptions in Selenium automation include NoSuchElementException, TimeoutException, and StaleElementReferenceException.

• NoSuchElementException occurs when an element cannot be found in the DOM.

• TimeoutException occurs when a command takes longer than the timeout value to complete.

• StaleElementReferenceException occurs when an element is no longer attached to the DOM.

• Other exceptions include ElementNotVisibleExcepti...read more

I faced arrayIndexOutOfBoundary exception while accessing an array element beyond its size.

• The exception occurred when trying to access an array element at an index greater than or equal to its size.

• To fix it, I checked the array size before accessing its elements.

• I also made sure to properly initialize the array with the correct size.

• Example: String[] arr = new String[5]; arr[5] = "hello"; // throws exception

Jenkins is an open-source automation server that helps to automate parts of the software development process.

• Jenkins is used for continuous integration and continuous delivery (CI/CD) of software projects.

• It can be integrated with Git to create a pipeline for building, testing, and deploying code.

• The Git pipeline in Jenkins involves creating a Jenkinsfile that defines the stages of the pipeline, such as checkout, build...read more

Git flow is a branching model for software development.

• Git flow consists of two main branches: master and develop.

• Feature branches are created off of develop and merged back into it.

• Release branches are created off of develop for preparing a new release.

• Hotfix branches are created off of master to fix critical issues in production.

• Git flow helps to maintain a structured and organized workflow for development.

• Example: g...read more

Excel reading involves extracting data from an Excel file using programming languages.

• Excel files can be read using libraries like Apache POI, OpenPyXL, and xlrd.

• Data can be extracted from specific cells or entire sheets.

• Excel files can be read in various formats like .xls, .xlsx, and .csv.

Extent Reports Config is a Java library used for generating interactive HTML reports for test automation results.

• Extent Reports Config is used to customize the look and feel of the generated reports.

• It allows users to add or remove report sections, change report themes, and configure report settings.

• Users can also add custom logos, CSS, and JavaScript to the reports.

• Extent Reports Config can be integrated with various ...read more