Prolifics Corporation React Js Frontend Developer Interview Questions and Answers

Q1. They asked basic functionalities in react
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Q2. Like what is redux and virtual DOM
Ans. 
Redux is a state management library for JavaScript applications, while virtual DOM is a lightweight copy of the actual DOM used for efficient rendering in React.
• Redux is used to manage the state of an application in a predictable way.

• It helps in maintaining a single source of truth for the state of the application.

• Virtual DOM is a lightweight copy of the actual DOM used by React to improve performance.

• It allows React t...read more
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Q1. Basic questions related to html5,css3,javascript,react js and DSA question to execute also
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Q2. 1.dsa for repeated array
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Implement a data structure and algorithm for finding repeated elements in an array.
• Use a hash map to store the frequency of each element in the array.

• Iterate through the array and update the frequency in the hash map.

• Return the elements with frequency greater than 1 as the repeated elements.
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Q3. 2.dsa for sorting array
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Implementing DSA for sorting array of strings
• Use a sorting algorithm like bubble sort, selection sort, or merge sort

• Compare strings using built-in comparison functions or custom comparison functions

• Ensure the sorting algorithm is efficient and handles edge cases
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Css3 questions JavaScript also. Login page and positions and dsa for flattened the nested array

2 problems, coding problems, java script

Q1. React version, redux middleware
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Q1. React Lifecycle Methods
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Todo list with Search functionality using react, 45 mins

Q1. Explain hooks in react
Ans. 
Hooks are a new addition in React 16.8 that allow you to use state and other React features without writing a class.
• Hooks are functions that let you use state and other React features in functional components.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that allows you to perform side effects in functional components.

• Custom hooks are reusable functions that can contai...read more
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Create weather application in react native with unit test scripts

Q1. Interceptors, guards, forms
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Q2. Angular lifecycle hooks, Aot compolation
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Q1. What are pipes in angular?
Ans. 
Pipes in Angular are used to transform data in templates.
• Pipes are used to format data before displaying it in the view.

• They can be used to filter, sort, or manipulate data in various ways.

• Examples include currency, date, uppercase, and lowercase pipes.
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They asked hacker rank test

Q1. Routing concept
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Q2. React js coding question
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