ELDAAS Technologies Interview Questions and Answers

Q1. Explain promises and callback functions with example
Ans. 
Promises and callback functions are used in Node.js for handling asynchronous operations.
• Callback functions are functions passed as arguments to another function to be executed later.

• Promises are objects representing the eventual completion or failure of an asynchronous operation.

• Example of callback function: fs.readFile('file.txt', (err, data) => { if (err) throw err; console.log(data); });

• Example of promise: const re...read more
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Q2. What is middleware
Ans. 
Middleware is a function that has access to the request and response objects in Node.js, and can modify or terminate the request-response cycle.
• Middleware functions can perform tasks like logging, authentication, error handling, etc.

• They are executed sequentially in the order they are defined in the code.

• Example: Express.js uses middleware to handle requests before they reach the route handler.
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Find the second largest elements in an array

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Q1. What is event loop
Ans. 
Event loop is a mechanism in Node.js that allows asynchronous operations to be executed non-blocking.
• Event loop is responsible for handling asynchronous operations in Node.js.

• It allows Node.js to perform non-blocking I/O operations.

• Event loop continuously checks the event queue for new events to execute.

• Event loop helps in efficient handling of multiple concurrent operations in Node.js.
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Q1. WAY OF QUESTION TREND
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Question trends in customer service are constantly evolving based on customer needs and technological advancements.
• Stay updated on industry trends through research and training

• Adapt communication style to match current trends (e.g. chatbots, social media)

• Utilize data analytics to understand customer preferences and behavior

• Provide personalized and efficient service to meet evolving customer expectations
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Q2. REPLY MY WAY OF PERFECT ENGLISH
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Q3. ALL BESED ON COMPUTER WORKS IN NON VOICE PROCESS
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Q4. I FLEXIBLE IN DAY SHIFT
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Q5. MY EXPECT 25K SALARY
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Draft an email about how will you convence a client.

Q1. Tell me about your self?
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Q2. What are skills , strength and weakness?
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Q1. Tell me about Yourself.
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Q2. Walk us through your role in the past organisation.
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Q1. Past working Experiences
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Q2. Educational Qualifications
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Q3. Awareness about the Indian Economy
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It was good experience, it build my confident

Q1. Servlet,collection framework, spring ,springboot, jsp,Ajax,Jdbc etc
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