NTECL Vallur Thermal Power Project Senior Software Engineer Interview Questions and Answers

Q1. Basic and general attitude based questions
Add your answer

Q1. About virtual DOM and it's implementation
Add your answer
Q2. Implementation of map, reduce, filter
Ans. 
Map, reduce, and filter are higher-order functions commonly used in functional programming to manipulate arrays.
• Map: Transforms each element in an array based on a provided function.

• Reduce: Reduces an array to a single value by applying a function to each element.

• Filter: Creates a new array with elements that pass a certain condition.
Answered by AI
Add your answer
Q3. Closures and their implementation
Ans. 
Closures are functions that have access to variables from their containing scope.
• Closures can access variables from their outer function even after the outer function has finished executing.

• Closures can be used to create private variables in JavaScript.

• Closures are commonly used in event handlers and callbacks.
Answered by AI
Add your answer
Q4. Redux sagas and their practical use cases
Ans. 
Redux sagas are middleware libraries for managing side effects in Redux applications.
• Redux sagas are used to handle asynchronous actions in Redux, such as API calls or timers.

• They are implemented as generator functions that can pause and resume execution.

• Redux sagas provide a more structured and testable approach to handling side effects compared to traditional Redux middleware like Thunk.

• Common use cases for redux sag...read more
Answered by AI
Add your answer
Q5. Basic javascript output questions
Add your answer

Q1. Write a function to find the sum of the array using reduce.
Ans. 
Function to find sum of array using reduce
• Use the reduce method to iterate through the array and accumulate the sum

• Convert array elements to numbers before summing them up

• Handle edge cases like empty array or non-numeric elements

• Example: const array = ['1', '2', '3']; const sum = array.reduce((acc, curr) => acc + Number(curr), 0);
Answered by AI
Add your answer
Q2. About form validation techniques
Add your answer
Q3. UseCallback and useMemo
Add your answer

Q1. What do you know about Hitachi energy
Ans. 
Hitachi Energy is a global technology leader that provides innovative and sustainable energy solutions.
• Hitachi Energy offers a wide range of products and services for the energy sector, including grid integration, digital solutions, and consulting services.

• The company focuses on creating a more sustainable energy future through its advanced technologies and expertise.

• Hitachi Energy is known for its commitment to innova...read more
Answered by AI
Add your answer
Q2. Why do you want to join only Hitachi energy.
Add your answer

Coding with UML diagrams

Q1. C++ Question related to pointers
Add your answer
Q2. C++ problem solving
Add your answer

Q1. C++ problem solving.
Add your answer

Q1. Managerial round with some problem solving.
Add your answer

Q1. Salary discussion.
Add your answer
Q2. Joining date confirmation.
Add your answer

Q1. Just half hour interview Oops concept
Add your answer
Q2. . Net and angular basics
Add your answer
Q3. Project in details
Add your answer

Q1. What if team is not supporting you
Add your answer
Q2. Manager is not agree
Add your answer
Q3. 5 year your goals
Add your answer

20 min - 20 questions

Q1. What is the difference between .net and .net core?
Ans. 
The main difference between .NET and .NET Core is that .NET Core is a cross-platform, open-source framework while .NET is a Windows-only framework.
• NET Core is cross-platform, meaning it can run on Windows, macOS, and Linux, while .NET is limited to Windows.

• .NET Core is open-source, allowing for community contributions and faster updates, while .NET is primarily developed by Microsoft.

• .NET Core is modular, allowing deve...read more
Answered by AI
Add your answer
Q2. What is the difference between function and stored procedure?
Ans. 
Functions return a single value, while stored procedures can perform multiple operations and return multiple values.
• Functions return a single value, while stored procedures can return multiple values.

• Functions are called in SQL statements, while stored procedures are called using the EXECUTE command.

• Functions cannot modify the database state, while stored procedures can.

• Functions are precompiled and stored in the datab...read more
Answered by AI
Add your answer

Q1. What is node js?
Ans. 
Node.js is a runtime environment that allows you to run JavaScript code outside of a web browser.
• Node.js is built on Chrome's V8 JavaScript engine.

• It uses an event-driven, non-blocking I/O model.

• Node.js is commonly used for building server-side applications.

• It has a large ecosystem of open-source libraries and frameworks like Express.js.
Answered by AI
Add your answer
Q2. What is event loop?
Ans. 
Event loop is a mechanism that allows a program to efficiently handle multiple events or tasks concurrently.
• Event loop is commonly used in asynchronous programming to manage tasks that may take varying amounts of time to complete.

• It continuously checks for events or tasks in a queue and executes them one by one.

• Event loop helps prevent blocking of the main thread by allowing non-blocking execution of tasks.

• Popular exam...read more
Answered by AI
Add your answer
Q3. Difference between callback and promise?
Ans. 
Callback is a function passed as an argument to another function to be executed later, while a promise is an object representing the eventual completion or failure of an asynchronous operation.
• Callback is used in traditional asynchronous programming, while promises are used in modern asynchronous programming.

• Callbacks can lead to callback hell or pyramid of doom, while promises provide better readability and error hand...read more
Answered by AI
Add your answer
Q4. What is middlewares in node js?
Ans. 
Middlewares in Node.js are functions that have access to the request and response objects, and can modify or terminate the request-response cycle.
• Middlewares are functions that are executed in the middle of the request-response cycle.

• They can perform tasks like parsing request data, logging, authentication, etc.

• Middlewares can be added using app.use() method in Express framework.

• Example: app.use(bodyParser.json()) to p
Answered by AI
Add your answer
Q5. What is event emitter?
Ans. 
Event emitter is a pattern used to handle and respond to events in software development.
• Event emitter is a design pattern commonly used in Node.js for handling events.

• It allows objects to subscribe to events and be notified when those events occur.

• Event emitter is often used for asynchronous programming and decoupling components.

• Example: EventEmitter class in Node.js can be used to create custom events and handle them.
Answered by AI
Add your answer