40+ Ness Digital Engineering Interview Questions and Answers

package.json is a file that contains metadata about a project and its dependencies.

• package.json is used in Node.js projects to manage dependencies

• Dependencies are packages required for the project to run

• Dev dependencies are packages required for development and testing

• Dependencies and dev dependencies are listed separately in package.json

• Example: "dependencies": {"express": "^4.17.1"}, "devDependencies": {"nodemon": "^2.0.7"}

Program to find the number of repeating characters in a given string using collections.

• Use a HashMap to store the characters as keys and their count as values.

• Iterate through the string and update the count in the HashMap for each character.

• Finally, iterate through the HashMap and count the characters with a count greater than 1.

Find the second largest number in an array of strings

• Convert the array of strings to an array of integers

• Sort the array in descending order

• Return the second element in the sorted array

To execute feature files in parallel in BDD Cucumber Framework, we can use tools like Maven Surefire plugin or Cucumber-JVM-Parallel-Plugin.

• Use Maven Surefire plugin to run tests in parallel by adding and tags in pom.xml file

• Use Cucumber-JVM-Parallel-Plugin to run tests in parallel by adding @CucumberOptions(plugin = {"json:target/cucumber-report/cucumber.json", "com.github.temyers:cucumber-jvm-parallel-plugin:5.0.0"}, threads = 3) annotation in the runner class

• Ensure that ...read more

Role based security can be created in SSAS by defining roles and assigning permissions to them.

• Create roles in SSAS and define permissions for each role

• Assign users or groups to each role

• Use Windows authentication or custom authentication to manage access to roles

• Test the security model thoroughly to ensure it is working as expected

Selenium code to login and add to cart on yatra.com

• Launch the yatra.com website

• Enter login credentials and click on login button

• Search for desired product and add to cart

• Verify the product is added to cart

DAX is a formula language used in Power BI. It has different types of functions including table DAX functions.

• DAX stands for Data Analysis Expressions

• DAX functions can be categorized into different types such as aggregation, time intelligence, filter, etc.

• Table DAX functions are used to manipulate tables in Power BI

• Examples of table DAX functions include FILTER, SUMMARIZE, ADDCOLUMNS, etc.

An interface is a contract between two entities defining the communication between them. In Selenium, interfaces are used to define the behavior of web elements.

• An interface defines a set of methods that a class implementing it must implement

• In Selenium, the WebElement interface is used to interact with web elements on a page

• Other interfaces in Selenium include WebDriver, TakesScreenshot, and JavascriptExecutor

• Interfaces allow for abstraction and modularity in code

To handle multiple popups in Selenium, we can use getWindowHandles() and switchTo() methods.

• Use getWindowHandles() method to get all the window handles

• Switch to the desired window using switchTo() method

• Perform actions on the popup window

• Switch back to the main window using switchTo() method

To get all options in a dropdown, use the getOptions() method and store the values in an array of strings.

• Locate the dropdown element using any of the locators

• Create a Select class object by passing the dropdown element as a parameter

• Use the getOptions() method to get all the options in the dropdown

• Store the options in an array of strings

Character frequency counting can be done using methods like hashmap, array, or sorting.

• Use hashmap to store characters as keys and their frequencies as values.

• Use an array to store frequencies of each character based on their ASCII values.

• Sort the input string and count consecutive characters to find frequencies.

O2C process stands for Order to Cash process, which involves all the steps from receiving an order to receiving payment.

• O2C process starts with receiving an order from a customer.

• It involves order processing, invoicing, and fulfillment of the order.

• The final step is receiving payment from the customer.

• It is a crucial process for businesses to ensure timely delivery and payment.

• Example: An e-commerce company following O2C process for online orders.

Main function in Java is the entry point of any Java program.

• Main function is declared as public static void main(String[] args)

• It is the starting point of execution for any Java program

• All the code inside main function is executed sequentially

• Example: public static void main(String[] args) { System.out.println("Hello World!"); }

Page Object Model is a design pattern used in test automation to create an object repository for web UI elements.

• It helps in reducing code duplication and improves code maintainability.

• Each web page is represented as a separate class and the web elements on the page are defined as variables in the class.

• The methods in the class perform actions on the web elements.

• It separates the test logic from the page-specific logic.

• It makes the tests more readable and easier to maintain.

• E...read more

Credentials can be sent via URL by appending them to the URL as query parameters.

• Append the username and password as query parameters to the URL

• Encode the username and password using Base64 encoding

• Example: http://example.com/login?username=admin&password=encoded_password

I would use remote access tools to troubleshoot the connection issue with the client and guide them through the steps to fix it.

• Initiate a remote session using tools like TeamViewer or AnyDesk to access the client's computer

• Identify the root cause of the connection issue by checking network settings, firewall configurations, or internet connectivity

• Guide the client through troubleshooting steps such as resetting the router, checking cables, or updating drivers

• Provide clear in...read more

Yes, I am familiar with API testing.

• API testing involves testing the functionality, reliability, performance, and security of APIs.

• It includes verifying the response data, status codes, headers, and error handling.

• Tools like Postman, SoapUI, or cURL can be used for API testing.

• Examples of API testing include testing RESTful APIs, web services, and microservices.

• Test cases can be created to validate input/output, authentication, authorization, and data integrity.

To scroll page to desired location, use JavaScriptExecutor and scrollTo() method.

• Create an instance of JavaScriptExecutor

• Use executeScript() method to execute scrollTo() method

• Pass the desired location as arguments to scrollTo() method

• Example: ((JavascriptExecutor) driver).executeScript("window.scrollTo(0, document.body.scrollHeight)");

Explicit wait waits for a specific condition while Fluent wait waits for a condition with polling interval.

• Explicit wait waits for a specific condition to occur before proceeding further

• Fluent wait waits for a condition with a polling interval and ignores exceptions

• Explicit wait is used when we know the condition and the maximum time to wait for it

• Fluent wait is used when we don't know the maximum time to wait for a condition

• Example of explicit wait: WebDriverWait wait = new ...read more

min, minA, minX, max, maxA, maxX are functions in Power BI used to calculate minimum and maximum values.

• min: Returns the smallest value in a column or expression.

• minA: Returns the smallest non-null value in a column or expression.

• minX: Returns the smallest value in a column or expression, considering a specified filter context.

• max: Returns the largest value in a column or expression.

• maxA: Returns the largest non-null value in a column or expression.

• maxX: Returns the largest v...read more

XPath is a language used to navigate and select elements in an XML or HTML document.

• XPath stands for XML Path Language

• It uses path expressions to select nodes or sets of nodes in an XML or HTML document

• There are two types of XPath: Absolute and Relative

• Absolute XPath starts from the root node and selects the nodes based on the complete path

• Relative XPath starts from the current node and selects the nodes based on the path relative to the current node

To initialize Chrome driver, create an instance of ChromeDriver class.

• Create an instance of ChromeDriver class

• Set the path of ChromeDriver executable file

• Use the instance to interact with the browser

The process flow for resource management involves identifying needs, allocating resources, monitoring usage, and optimizing efficiency.

• Identify resource needs based on project requirements

• Allocate resources based on availability and skill set

• Monitor resource usage to ensure optimal utilization

• Optimize resource efficiency through regular evaluation and adjustments

Program to reverse a string

• Create an empty string to store the reversed string

• Loop through the original string from end to start

• Append each character to the empty string

• Return the reversed string

Serverless architecture is a cloud computing model where the cloud provider manages the infrastructure and automatically scales resources.

• Serverless architecture eliminates the need for managing servers and infrastructure

• It allows developers to focus on writing code and deploying applications

• Resources are provisioned and scaled automatically based on demand

• Examples of serverless services include AWS Lambda, Azure Functions, and Google Cloud Functions

final, finally, and finalized are keywords in Java with different meanings.

• final is a keyword used to declare a constant value or to prevent a variable from being modified.

• finally is a block used in exception handling to ensure a piece of code is always executed, regardless of whether an exception is thrown or not.

• finalized is a method in Java's Object class used for garbage collection, called before an object is destroyed.

Power BI supports multiple connectivity modes for data sources.

• DirectQuery mode allows real-time data access from the source system.

• Import mode imports data into Power BI for faster performance.

• Live Connection mode connects to an external Analysis Services model.

• Power BI Gateway enables on-premises data access.

• Power BI Dataflows allows data preparation and transformation in the cloud.

I rate myself a 4 out of 5 in other technologies.

• Proficient in HTML/CSS

• Strong knowledge of JavaScript

• Familiar with Node.js and Express.js

• Experience with SQL and NoSQL databases

• Basic understanding of Python

Stale element exception occurs when an element is no longer attached to the DOM. It can be handled by refreshing the page or waiting for the element to become available again.

• Refresh the page before interacting with the element

• Wait for the element to become available again using explicit or implicit waits

• Handle the exception using try-catch block

Object-oriented programming concepts explained with real-time examples.

• Encapsulation: A car encapsulates its internal components like engine, gearbox, etc.

• Inheritance: A dog inherits traits like barking and wagging tail from its parent class Animal.

• Polymorphism: A shape class can have different methods like area() for different shapes like circle, rectangle, etc.

• Abstraction: A TV remote abstracts the complex functionality of the TV into simple buttons.

• Class: A class defines t...read more

Polymorphism is the ability of an object to take on many forms. There are two types: compile-time and runtime.

• Compile-time polymorphism is achieved through function overloading and operator overloading.

• Runtime polymorphism is achieved through virtual functions and function overriding.

• Polymorphism allows for code reusability and flexibility in object-oriented programming.

• Example of compile-time polymorphism: function overloading - multiple functions with the same name but diff...read more

The bench strength is currently at X number of employees.

• The bench strength refers to the number of employees available to fill in for any vacancies or unexpected absences.

• We currently have X number of employees who are trained and capable of taking on additional responsibilities.

• Our bench strength is regularly reviewed and updated to ensure we have adequate coverage.

• Examples of bench strength include cross-trained employees, part-time staff, and temporary workers.

SAP FICO offers comprehensive financial management solutions with integration capabilities.

• SAP FICO provides real-time financial data for better decision-making

• It integrates with other SAP modules for seamless business processes

• Offers advanced reporting and analytics tools for financial analysis

• Ensures compliance with regulatory requirements

• Supports multi-currency and multi-language capabilities

Async improves performance by allowing non-blocking execution of tasks.

• Async programming allows multiple tasks to run concurrently, improving overall system throughput.

• By avoiding blocking operations, such as waiting for I/O or network requests, other tasks can continue execution.

• Async programming can utilize resources more efficiently by reducing idle time.

• It enables better responsiveness in user interfaces by not blocking the main thread.

• Examples of async programming in act...read more

Different types of CDs views include hierarchical, network, relational, object-oriented, and multidimensional views.

• Hierarchical view organizes data in a tree-like structure with parent-child relationships.

• Network view allows for multiple parent-child relationships between records.

• Relational view represents data in tables with rows and columns.

• Object-oriented view treats data as objects with attributes and methods.

• Multidimensional view organizes data in multiple dimensions fo...read more

Use JavaScript to get all options from a drop down menu

• Use document.getElementById() to select the drop down element

• Access the options property of the element to get all options

• Loop through the options to extract the text values

Check if a string is a palindrome by comparing characters from start and end.

• Create a function that takes a string as input

• Use two pointers, one starting from the beginning and one from the end, to compare characters

• If all characters match, return true; otherwise, return false

Using Java 8 stream API to find answer for a given question

• Use stream() method on a collection to create a stream

• Use filter() method to filter elements based on a condition

• Use map() method to transform elements

• Use reduce() method to perform a reduction operation on the elements

API parameters are declared in the request URL or body to pass data to the API endpoint.

• Declare API parameters in the URL by adding them after the endpoint with a '?' and separating them with '&'

• Declare API parameters in the request body for POST requests by sending key-value pairs in JSON format

• Example: /api/users?id=123&name=John for URL parameters, {"id": 123, "name": "John"} for request body

API testing allows for thorough testing of backend functionality but can be complex and time-consuming.

• Advantage: Allows for thorough testing of backend functionality

• Advantage: Can be automated for efficiency

• Disadvantage: Complex and time-consuming to set up and maintain

• Disadvantage: Requires knowledge of programming languages and APIs

• Disadvantage: Limited ability to test user interface

Selenium screen shot program captures screenshots during test execution.

• Use Selenium WebDriver to capture screenshots in automated tests

• Use getScreenshotAs() method to take screenshots

• Save screenshots in a specified location for later analysis

A program to reverse an array of strings

• Iterate through the array of strings and reverse each string individually

• Use a temporary variable to swap characters at the beginning and end of each string

• Return the reversed array of strings

Optimization of application involves improving performance and efficiency.

• Identify and eliminate unnecessary re-renders by using React.memo or shouldComponentUpdate.

• Use code splitting and lazy loading to reduce initial load time.

• Optimize network requests by using caching and reducing unnecessary data transfers.

• Minimize the use of expensive operations like deep object comparisons or complex calculations in render methods.

• Optimize rendering by using virtualization techniques li...read more

Use atoi() function in C to convert a string to an integer.

• Use the atoi() function in C to convert a string to an integer.

• Include the header file to use the atoi() function.

• Example: int num = atoi("1234"); // num will be 1234

Design a parking lot application

• Include features like parking space availability, reservation system, payment options

• Implement real-time updates on available parking spots

• Incorporate a user-friendly interface for easy navigation and booking

• Integrate a notification system for reminders and alerts

• Utilize a database to store information on parking spots, reservations, and payments

Challenges in automation include complexity of systems, lack of standardization, and difficulty in handling edge cases.

• Complexity of systems can make it difficult to create robust automation scripts.

• Lack of standardization across different tools and technologies can lead to compatibility issues.

• Handling edge cases, such as unexpected user inputs or system failures, can be challenging to automate.

• Continuous maintenance and updates are required to keep automation scripts releva...read more

Using webAPI to retrieve responses

• Utilize RESTful APIs to interact with web services

• Implement HTTP methods like GET, POST, PUT, DELETE

• Handle authentication and authorization for secure access