Tata Power Technical Support Engineer Interview Questions and Answers

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Q1. What is the of electricity? What do you understand by transmission and distribution of electricity?
Ans. 
Transmission and distribution are the processes of delivering electricity from power plants to consumers.
• Transmission involves high voltage power lines that transport electricity over long distances.

• Distribution involves lower voltage power lines that deliver electricity to homes and businesses.

• Both processes require transformers to step up or step down voltage as needed.

• Smart grid technology is being used to improve t...read more
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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.
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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
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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
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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
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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.
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30 question 30 min are given for the apptitude test test was medioker.

Q1. Introduce yourself, why this job
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Q1. What is mechanical engineering
Ans. 
Mechanical engineering is the branch of engineering that deals with the design, analysis, and manufacturing of mechanical systems.
• Involves the application of physics, mathematics, and materials science

• Designs and analyzes machines, engines, and other mechanical systems

• Includes areas such as thermodynamics, mechanics, and robotics

• Examples include designing car engines, aircraft structures, and medical devices
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Q1. Tell me about yourself
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