Analyttica Datalab 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
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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. Estimate number of burgers sold by one burger Outlet in your city.
Ans. 
The number of burgers sold by a burger outlet in a city can vary based on factors like location, menu offerings, pricing, and customer demand.
• Consider the population of the city and the popularity of the outlet.

• Analyze the outlet's menu offerings and pricing compared to competitors.

• Take into account any special promotions or events that may impact sales.

• Look at historical sales data if available.

• Interview employees or
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Q1. Estimate transportation cost for raw materials.
Ans. 
Transportation cost for raw materials can be estimated based on distance, mode of transportation, quantity, and current market rates.
• Consider the distance between the supplier and the manufacturing facility

• Take into account the mode of transportation (road, rail, sea, air)

• Calculate the quantity of raw materials being transported

• Research current market rates for transportation services

• Factor in any additional costs such
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Q1. Asked about past experience
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Q2. Some guesstimate question
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Assessment on Sql Expertise, 2 lengthy sql questions in 30 mins time

Q1. Hard Questions on sql
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Q2. Basic questions on Python
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Q1. Basic Features of Excel and Keywords
Ans. 
Excel is a spreadsheet program used for data organization and analysis.
• Basic features include formulas, functions, charts, and sorting/filtering.

• Keywords include cells, rows, columns, and worksheets.

• Examples: SUM function, PivotTables, VLOOKUP formula.
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Q2. What you do in a customer service job and how you interact with the customers and solve their query.
Ans. 
In a customer service job, I interact with customers to understand their queries and provide solutions to their problems.
• Listen actively to customers to understand their concerns

• Empathize with customers to show understanding and build rapport

• Offer solutions or alternatives to address customer issues

• Follow up with customers to ensure their concerns are resolved

• Maintain a positive and professional attitude throughout int
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Q3. Procedure of Online KYC
Ans. 
Online KYC is the process of verifying the identity of customers remotely through digital means.
• Collect customer information such as name, address, date of birth, and identification documents.

• Use verification methods like biometric authentication, facial recognition, or document verification.

• Verify the authenticity of the documents provided by the customer.

• Comply with regulatory requirements and data protection laws.

• No...read more
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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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