AI Variant Data Science Interview Questions and Answers

3 hour oa - binary search , graph , dp

Q1. What is object orinted programing ?
Ans. 
Object-oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
• Objects are instances of classes, which define the structure and behavior of the objects.

• Encapsulation, inheritance, and polymorphism are key principles of object-oriented programming.

• Examples include Java, C++, and Python, which are popular object-oriented programming languages.
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Q2. Write sql query for the bank transaction ?
Ans. 
SQL query to retrieve bank transactions data.
• Use SELECT statement to retrieve data from transaction table.

• Filter data based on account number or transaction date.

• Group data by transaction type or amount for analysis.
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Q1. Basic sql and data science related
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Q1. React Life cycle
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Q2. What React hooks have you utilized in your projects?
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Q3. What is Redux, and what are the differences between Redux and Context?
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Q4. What is the difference between visibility: hidden and display: none in CSS?
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Q5. What are JavaScript closures, the temporal dead zone (TDZ), hoisting, and the JavaScript engine?
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Identify the duplicate character in the string.

Q1. Mostly js questions, not so many of angular or react.
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Q2. Like fizbuzz or things like that.
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Coding a frontend UI from provided image. And creating a fucntional star rating system

Q1. Designing a Component API in React using Typescript.
Ans. 
Designing a Component API in React using Typescript involves defining props, state, and methods for the component.
• Define the props interface to specify the expected input data for the component

• Use typescript types to ensure type safety and prevent runtime errors

• Define the state interface to manage the internal state of the component

• Implement methods to handle user interactions and component logic

• Document the component
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Q2. Create a function that can clear all the timer ids at once.
Ans. 
Function to clear all timer ids at once
• Create an array to store all timer ids

• Iterate through the array and clear each timer id using clearTimeout() function
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Q1. Introduction life cycle looks pipe @input @output
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Q1. What is event bubbling
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Q2. What is TDD and why TDD
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Reactive form and crud operations pipes crud operations

Q1. Basic understanding of js and angular is must expeciallly how js works questions on arrays objects shallow deep copy
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