Q1. What is Pure function?
Ans. 
A pure function is a function that always produces the same output for the same input and has no side effects.
• Always returns the same output for the same input

• Does not modify any external state or variables

• No side effects, such as network requests or console logs

• Easier to test and reason about
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Q2. What is redux? Explain it with example
Ans. 
Redux is a predictable state container for JavaScript apps.
• Redux is a state management tool commonly used with React.

• It helps in managing the state of an application in a predictable way.

• Redux stores the state of the application in a single immutable state tree.

• Actions are dispatched to update the state, and reducers specify how the state changes in response to actions.

• Example: const initialState = { count: 0 }; const ...read more
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Q1. How to send the data from child to parent component?
Ans. 
Data can be sent from child to parent component in React by using callback functions.
• Use callback functions to pass data from child to parent component

• Define a function in the parent component and pass it as a prop to the child component

• Call the function in the child component with the data as an argument
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Q2. What is closure?
Ans. 
Closure is the combination of a function bundled together with references to its surrounding state.
• Closure allows a function to access variables from its outer scope even after the outer function has finished executing.

• It helps in maintaining state in functional programming.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }
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Coding test duration 40 min topic is frontend developer design the web pages by using the html,css and javascript.pefjilqrbfljkpkobnocec krgvk 2ktkgnpkognne fnjgnojvn

Q1. What is tags ? full form of html ans css ? what is frontend Developer ? how to design the web pages ? why using the css properties ? how many ways to writen the css attributes ? what is text tag ? what is...read more
Ans. 
Answers to various questions related to web design and frontend development.
• Tags are HTML elements used to define the structure and content of a web page.

• HTML stands for Hypertext Markup Language and CSS stands for Cascading Style Sheets.

• A frontend developer is responsible for designing and implementing the user interface of a website.

• Web pages can be designed using HTML and CSS, with the latter used to style the page.

• ...read more
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Q2. How may types to create a web page ? what are differnt types of tages and how to work ? what is css attributes ?
Ans. 
There are several ways to create a web page. HTML tags are used to structure content, while CSS attributes are used to style it.
• Types of web pages include static, dynamic, and responsive.

• HTML tags include headings, paragraphs, images, links, and more.

• CSS attributes include color, font-size, margin, padding, and more.

• HTML and CSS work together to create visually appealing and functional web pages.
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Q1. Given api url get data from API and render in UI and create custom pipe for change id into 1**8
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Q2. What challenges faced during migration angular 12 to 17 and how to fix What is reducer in ngrx and how to create How to flat an array and sorting
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Q3. Suppose we have two components parent and child relationship. In child component one button how can access these methods in parents component Suppose we have 3 components if changes in componentA then how...read more
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Q1. Explain Virtual DOM, Key Features of React, Hooks in React, create a todo app in react
Ans. 
Virtual DOM is a lightweight copy of the actual DOM, React key features include component-based architecture, declarative syntax, and virtual DOM, React Hooks are functions that let you use state and other React features without writing a class.
• Virtual DOM is a lightweight copy of the actual DOM that React uses to improve performance by updating only the necessary parts of the DOM.

• Key features of React include componen...read more
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Q2. Javascript Questions- Closures,promises,Async/await,setTimeOut, write acode to reverse a string
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Q1. Self Introduction, some situation based questions
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Q2. Basic HR regular questions
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Q1. What is closuer? is normal function call as closuer or not
Ans. 
A closure is a function that has access to its own scope, as well as the scope in which it was defined.
• A closure allows a function to access variables from its outer function even after the outer function has finished executing.

• Closures are created whenever a function is defined within another function.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVa
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Q2. What is asyn/await
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Async/await is a feature in JavaScript that allows for asynchronous code to be written in a synchronous manner.
• Async/await is built on top of promises and provides a more readable and concise way to work with asynchronous code.

• The 'async' keyword is used to define a function as asynchronous, allowing it to use the 'await' keyword inside it.

• When 'await' is used, it pauses the execution of the function until the promise ...read more
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Q3. Remove duplicate from array
Ans. 
Use Set to remove duplicates from array of strings.
• Create a Set from the array to automatically remove duplicates

• Convert the Set back to an array if needed

• Example: const arr = ['apple', 'banana', 'apple', 'orange']; const uniqueArr = [...new Set(arr)];
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Q4. Hoe does react Dom update?
Ans. 
React DOM updates by comparing the virtual DOM with the actual DOM and only updating the necessary components.
• React creates a virtual DOM to represent the UI components.

• When a state or prop changes, React re-renders the virtual DOM.

• React then compares the virtual DOM with the actual DOM to identify the differences.

• Only the necessary components are updated in the actual DOM, minimizing performance impact.
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Q5. What is react hooks explain some
Ans. 
React Hooks are functions that let you use state and other React features without writing a class.
• React Hooks were introduced in React 16.8.

• They allow you to use state and other React features in functional components.

• Some commonly used hooks are useState, useEffect, useContext, and useRef.

• Hooks make it easier to reuse logic across components.

• Hooks can be used to manage component state, perform side effects, and more.
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Q6. What is call bind apply?
Ans. 
Call, bind, and apply are methods used to manipulate the value of 'this' in JavaScript functions.
• Call - invokes a function with a specified 'this' value and arguments provided individually.

• Bind - creates a new function that, when called, has its 'this' keyword set to the provided value.

• Apply - invokes a function with a specified 'this' value and arguments provided as an array.
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Q7. What is difference b/w redux and redux toolkit
Ans. 
Redux Toolkit is a set of tools and best practices to simplify Redux development, while Redux is a predictable state container for JavaScript apps.
• Redux Toolkit provides a set of tools like createSlice, createAsyncThunk, and configureStore to simplify Redux setup and reduce boilerplate code.

• Redux Toolkit includes immer library for writing immutable update logic in a more convenient way.

• Redux Toolkit also includes a def...read more
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Q8. Write a RTL test to check the button
Ans. 
Writing a RTL test to check a button in React
• Use the render and fireEvent functions from @testing-library/react

• Find the button element using getByRole('button')

• Simulate a click event using fireEvent.click

• Assert that the button is visible and clickable
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Q9. What inline level and block level elements

Ans. 

Inline and block level elements in HTML/CSS

• Inline elements flow in the document in a line, without starting a new line. Examples include , , .

• Block level elements start on a new line and take up the full width available. Examples include

  ,

  ,

  .

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