200+ Sdet Automation Test Engineer Interview Questions and Answers

I have always been a dedicated student, excelling in academics and extracurricular activities.

• Consistently achieved top grades in all subjects

• Participated in various school competitions and won awards

• Served as a class representative and organized events

• Took part in sports teams and cultural activities

Xpath writing with parent child relation involves specifying the path to locate elements based on their hierarchical relationship.

• Use '/' to specify direct child elements

• Use '//' to specify any descendant elements

• Use '[]' to specify conditions for selecting elements

• Example: //div[@class='parent']/child::span

SQL is a relational database management system, while MongoDB is a NoSQL database management system.

• SQL is a relational database, MongoDB is a document-oriented database

• SQL uses tables and rows, MongoDB uses collections and documents

• SQL uses structured query language, MongoDB uses JSON-like documents with dynamic schemas

Response codes in API testing indicate the status of the request made to the API.

• 200 - OK: Request was successful

• 400 - Bad Request: Invalid input or missing parameters

• 401 - Unauthorized: Authentication required

• 404 - Not Found: Resource not found

• 500 - Internal Server Error: Server-side issue

Array sorting for a given input involves arranging elements in a specific order.

• Use built-in sorting functions like sort() in programming languages such as Java, Python, or JavaScript.

• Consider the sorting algorithm complexity for large arrays.

• Ensure the sorting is done based on the specific requirements like alphabetical order or numerical order.

Java program to reverse a sentence

• Split the sentence into words using the split() method

• Create a new array to store the reversed words

• Iterate through the words in reverse order and add them to the new array

• Join the reversed words using the join() method to form the reversed sentence

Methods of selecting elements in automation testing include using locators, XPath, CSS selectors, and various other strategies.

• Using locators such as ID, class name, name, tag name, link text, and partial link text

• Using XPath to navigate through elements in the HTML structure

• Using CSS selectors to target elements based on their styles

• Using various strategies like text matching, attribute values, and sibling/child relationships

• Examples: driver.findElement(By.id("elementId")), ...read more

Object-oriented programming concepts that focus on classes, objects, inheritance, encapsulation, and polymorphism.

• Classes: Blueprint for creating objects with attributes and methods.

• Objects: Instances of classes that contain data and behavior.

• Inheritance: Ability for a class to inherit properties and methods from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability for objects to be treated as instances of th...read more

Create a test case plan for API testing

• Identify the API endpoints to be tested

• Define the input data and expected output for each endpoint

• Create test cases for positive and negative scenarios

• Include test cases for edge cases and boundary conditions

• Document the steps to execute each test case

I am working on a hybrid framework that combines data-driven and keyword-driven approaches.

• The framework uses Excel sheets to store test data and keywords.

• It uses Selenium WebDriver for browser automation.

• It has a modular structure with reusable functions and libraries.

• It supports parallel execution of tests.

• It generates detailed reports with screenshots and logs.

XPath is a way to navigate through elements on a webpage using their attributes.

• Inspect the element on the webpage to identify unique attributes like id, class, name, etc.

• Construct the XPath using the unique attributes to locate the element.

• Use tools like Chrome Developer Tools or Firebug to help generate XPath.

• Avoid using absolute XPath as they can be brittle and prone to breaking.

• Consider using relative XPath for better maintainability.

Client side script languages run on the user's browser, while server side script languages run on the server.

• Client side script languages include JavaScript, HTML, and CSS.

• Server side script languages include PHP, Python, and Ruby.

• Client side scripts are executed on the user's browser, while server side scripts are executed on the server before the page is sent to the user.

• Client side scripts can be viewed and modified by users, while server side scripts are not visible to us...read more

Use Selenium WebDriver to take a screenshot of a specific element on a web page

• Locate the element using appropriate locator strategy

• Use Selenium WebDriver's TakesScreenshot interface to capture the screenshot

• Crop the screenshot to focus on the specific element if needed

Find common elements in an array of strings.

• Iterate through the array and compare each element with the rest of the elements.

• Use a nested loop to compare each element with all other elements.

• If an element is found to be common, add it to a separate array or list.

• Return the array or list of common elements.

Java program to search for a character in an array of strings

• Create a method that takes in an array of strings and a character to search for

• Iterate through each string in the array and check if the character is present

• Return true if the character is found in any of the strings, false otherwise

I have had the opportunity to experience various old cultural traditions and practices.

• Participating in traditional festivals and ceremonies

• Learning about ancient customs and rituals

• Visiting historical sites and museums

• Interacting with elders and hearing their stories

Checked exceptions are checked at compile time, while unchecked exceptions are not.

• Checked exceptions must be handled by the code or declared in the method signature using 'throws' keyword.

• Unchecked exceptions do not need to be caught or declared in the method signature.

• Examples of checked exceptions: IOException, SQLException.

• Examples of unchecked exceptions: NullPointerException, ArrayIndexOutOfBoundsException.

Procedures are a set of steps or actions that need to be followed in a specific order to achieve a desired outcome.

• Procedures provide a structured approach to completing tasks.

• They help ensure consistency and accuracy in performing tasks.

• Procedures can be documented in manuals, guides, or standard operating procedures.

• Examples include software testing procedures, medical procedures, and manufacturing procedures.

Test cases for lift functionality

• Test the lift buttons for each floor

• Test the emergency stop button

• Test the door open and close functionality

• Test the capacity limit of the lift

• Test the response time of the lift to call buttons

To find a loop in a linked list, use Floyd's Cycle Detection Algorithm.

• Use two pointers - slow and fast, where slow moves one step at a time and fast moves two steps at a time.

• If there is a loop, the two pointers will eventually meet at some point within the loop.

• To find the starting point of the loop, reset one pointer to the head and move both pointers one step at a time until they meet again.

Group anagram strings in an array

• Iterate through the array of strings

• For each string, sort the characters alphabetically

• Use a hashmap to group anagrams together based on sorted strings

Yes, I am open to relocating for the right opportunity.

• I am open to relocating for the right job opportunity

• I have relocated for previous roles and am comfortable with the process

• I am willing to consider different locations based on the job requirements

A class is a blueprint for creating objects in object-oriented programming, while a variable is a container for storing data.

• A class defines the properties and behaviors of objects, while a variable holds a value that can be changed or manipulated.

• Classes can be used to create multiple instances of objects with the same properties and behaviors.

• Variables can be of different data types such as int, string, boolean, etc.

• Example: Class - Car (properties: color, model; behaviors:...read more

Program in Python to remove duplicates from an array of strings.

• Use a set to store unique elements

• Iterate through the array and add each element to the set

• Convert the set back to a list to remove duplicates

A framework is a structured set of guidelines, libraries, and tools that help in developing and maintaining automation test scripts.

• Framework provides a structure for organizing code and resources.

• It includes reusable components like libraries, utilities, and templates.

• Frameworks can be data-driven, keyword-driven, or hybrid.

• Examples: Selenium WebDriver, TestNG, JUnit.

Recursion() function is a programming technique where a function calls itself in order to solve a problem.

• Recursion involves breaking down a problem into smaller subproblems and solving them recursively.

• It is important to have a base case to prevent infinite recursion.

• Examples include factorial calculation, Fibonacci sequence, and tree traversal.

getWindowsHandles is a method in Selenium WebDriver used to get the window handles of all the open browser windows.

• getWindowsHandles returns a set of window handles as strings.

• It is useful for switching between multiple browser windows during automation testing.

• Example: Set handles = driver.getWindowHandles();

Severity is the impact of a bug on the system, while priority is the urgency of fixing it.

• Severity is the measure of how much a bug affects the system's functionality.

• Priority is the order in which bugs should be fixed based on urgency.

• Severity is usually categorized as low, medium, or high.

• Priority is usually categorized as low, medium, or high.

• For example, a bug that causes the system to crash would have high severity and high priority.

Locate element using Xpath and retrieve window handle in automation testing.

• Use findElement method with By.xpath to locate the element using Xpath.

• Use getWindowHandle method to retrieve the window handle.

Types of waits in automation testing with their syntax

• Implicit Wait: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

• Explicit Wait: WebDriverWait wait = new WebDriverWait(driver, 10); wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("elementID")));

• Fluent Wait: Wait wait = new FluentWait(driver).withTimeout(Duration.ofSeconds(10)).pollingEvery(Duration.ofSeconds(2)).ignoring(NoSuchElementException.class);

Program to find duplicates in an array.

• Iterate through the array and compare each element with the rest of the elements.

• If a match is found, add it to a separate array or print it.

• Use a hash table to keep track of the frequency of each element.

• Sort the array and compare adjacent elements to find duplicates.

Use TreeMap to automatically sort hash map keys in ascending order

• Create a TreeMap and pass the hash map to its constructor

• Iterate over the TreeMap to access the keys in ascending order

Prefix Sum and left sum of binary tree involves calculating the sum of all nodes in a binary tree and the sum of nodes on the left side of each node.

• Calculate prefix sum of binary tree by traversing in a pre-order manner and keeping track of the running sum.

• To calculate left sum of binary tree, traverse the tree in a pre-order manner and keep track of the sum of nodes on the left side of each node.

• Example: For a binary tree with nodes 1, 2, 3, 4, 5, the prefix sum would be 15...read more

A constructor is a special type of method that is automatically called when an object is created.

• Constructors have the same name as the class they belong to

• They are used to initialize the object's state

• Constructors do not have a return type

• They can be overloaded to accept different parameters

Reverse a string in Java

• Convert the string to a character array

• Use two pointers, one at the start and one at the end of the array

• Swap the characters at the two pointers and move the pointers towards each other

• Continue swapping until the pointers meet in the middle

My automation framework is a data-driven framework using Selenium WebDriver and TestNG for automated testing.

• Uses Selenium WebDriver for interacting with web elements

• Utilizes TestNG for test case management and reporting

• Employs data-driven approach for test data separation

• Includes logging and reporting mechanisms for test execution

• Supports parallel execution for faster test runs

println adds a new line after printing, while print does not

• println adds a new line character at the end of the output

• print does not add a new line character, so the next output will be on the same line

• Example: println('Hello') will print 'Hello' on a new line, while print('Hello') will print 'Hello' on the same line

Robot Framework is a powerful open-source automation framework that offers easy-to-use syntax and supports keyword-driven testing.

• Robot Framework provides a simple and readable syntax, making it easy to write and maintain test cases.

• It supports keyword-driven testing, allowing for high-level test case design and reusability.

• Robot Framework has a rich ecosystem with a wide range of libraries and tools, making it highly extensible.

• It supports various test automation approaches,...read more

OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPs focuses on creating objects that interact with each other to solve problems

• Key features of OOPs include encapsulation, inheritance, polymorphism, and abstraction

• Encapsulation refers to bundling data and methods that operate on the data into a single unit

• Inheritance allows a class to inherit properties and behavior from another class

• Po...read more

I am an experienced SDET Automation Test Engineer with a strong background in software testing and test automation.

• I have a Bachelor's degree in Computer Science and have been working in the field for over 5 years.

• I have expertise in designing and implementing test automation frameworks using tools like Selenium and Cucumber.

• I have experience in writing test scripts, executing test cases, and analyzing test results.

• I am proficient in programming languages like Java and Python...read more

Polymorphism is the ability of a single function or method to operate on different types of data.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.

Oops concepts refer to object-oriented programming principles like inheritance, polymorphism, encapsulation, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class. Example: Parent class 'Animal' and child class 'Dog'.

• Polymorphism: Ability of an object to take on multiple forms. Example: Method overloading and overriding.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Private variables a...read more

OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.

• OOPS focuses on creating objects that contain data in the form of fields (attributes) and code in the form of procedures (methods).

• Encapsulation, inheritance, and polymorphism are key principles of OOPS.

• Encapsulation refers to the bundling of data with the methods that operate on that data.

• Inheritance allows classes to inherit attributes and methods from other clas...read more

Agile process is a software development methodology that promotes adaptive planning, evolutionary development, early delivery, and continuous improvement.

• Agile process involves breaking down the project into small increments called sprints

• It emphasizes collaboration between cross-functional teams

• Feedback is gathered regularly from stakeholders to make necessary adjustments

• Scrum, Kanban, and XP are common frameworks used in agile development

Oops Concepts are fundamental principles of object-oriented programming such as Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a function to behave differently based on the object it is acting upon.

• Abstraction: Hiding the complex implementation details and showing only the nec...read more

A singleton class is a class that can only have one instance created and provides a global point of access to that instance.

• Singleton classes are often used in scenarios where only one instance of a class is needed, such as for managing a connection pool or configuration settings.

• The singleton pattern typically involves a private constructor, a static method to access the instance, and a static variable to hold the instance.

• Example: In Java, a singleton class can be implement...read more

Different types of exceptions include checked, unchecked, and errors.

• Checked exceptions are checked at compile time and must be handled or declared.

• Unchecked exceptions are not checked at compile time and can be handled or not.

• Errors are exceptional conditions that are not meant to be caught or handled.