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I was interviewed in Jan 2025.
Semantic tags in HTML are specific tags that provide meaning to the content they enclose.
Semantic tags help search engines and screen readers understand the structure of a webpage.
Examples of semantic tags include <header>, <footer>, <nav>, <article>, <section>, <aside>, <main>, <figure>, <figcaption>.
Using semantic tags improves SEO and accessibility of a website.
Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of nested functions, each taking a single argument.
Currying helps in creating reusable functions and partial application.
It allows you to create new functions by fixing some parameters of an existing function.
Example: const add = (a) => (b) => a + b; add(2)(3) will return 5.
Map is used to transform each element of an array, while Filter is used to select elements based on a condition.
Map returns a new array with the same length as the original array, but with each element transformed based on a provided function.
Filter returns a new array with only the elements that pass a provided condition function.
Example for Map: [1, 2, 3].map(num => num * 2) will result in [2, 4, 6].
Example for Fi...
Map creates a new array with the results of calling a provided function on every element, while forEach executes a provided function once for each array element.
Map returns a new array with the same length as the original array, while forEach does not return anything.
Map does not mutate the original array, while forEach can mutate the original array.
Map is more suitable for transforming data and creating a new array, w...
Authentication verifies the identity of a user, while authorization determines the user's access rights.
Authentication confirms the user's identity through credentials like username and password.
Authorization determines what actions the authenticated user is allowed to perform.
Authentication precedes authorization in the security process.
Example: Logging into a website (authentication) and then accessing specific pages
Local storage persists even after the browser is closed, while session storage is cleared when the browser is closed.
Local storage has no expiration date, while session storage expires when the browser is closed.
Local storage stores data with no limit, while session storage has a limit of around 5MB.
Local storage data is available across all windows/tabs for that domain, while session storage data is only available wit...
I applied via Company Website and was interviewed in Oct 2024. There were 3 interview rounds.
ES6 is the latest version of ECMAScript with new features like arrow functions, classes, and template literals.
Arrow functions provide a more concise syntax for writing functions.
Classes allow for easier object-oriented programming in JavaScript.
Template literals make it easier to work with strings by allowing interpolation and multiline strings.
Creating react componont with api integration, list rendering and adding custom filterals
Coding exercise, custom hooks, UI related quetions
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
Variable declarations are hoisted but not their initializations.
Function declarations are fully hoisted, meaning they can be called before they are declared.
Hoisting can lead to unexpected behavior if not understood properly.
CSS positions include static, relative, absolute, fixed, and sticky.
Static - default position, elements are positioned according to the normal flow of the document
Relative - positioned relative to its normal position
Absolute - positioned relative to the nearest positioned ancestor
Fixed - positioned relative to the viewport
Sticky - acts like a combination of relative and fixed positioning
Semantic tags are HTML tags that clearly define the content they contain for better accessibility and SEO.
Semantic tags provide meaning to the content they enclose, making it easier for search engines to understand the structure of the page.
Examples of semantic tags include
Using semantic tags improves the accessibility of the website for users with disabilities, as screen readers can interp
Promise chaining is a technique in JavaScript where multiple asynchronous operations are chained together to execute sequentially.
Allows for handling multiple asynchronous operations in a more readable and organized way
Each promise in the chain returns a new promise, allowing for further chaining
Helps avoid callback hell by nesting promises inside each other
Example: promise1.then(result => { return promise2; }).then(re
Virtual DOM is a lightweight copy of the actual DOM that React uses to improve performance by minimizing direct manipulation of the actual DOM.
Virtual DOM is a concept in React where a lightweight copy of the actual DOM is created and updated in memory.
When changes are made to the virtual DOM, React compares it with the actual DOM and only updates the necessary parts, reducing the number of direct manipulations to the ...
Synthetic events in React are events that are normalized by React to ensure consistent behavior across different browsers.
Synthetic events are instances of the SyntheticEvent object in React.
They are cross-browser compatible and have the same interface as native events.
They are used to handle events like onClick, onChange, etc. in React components.
Example:
Redux is a predictable state container for JavaScript apps.
Redux is a state management tool commonly used with React to manage the application's state in a predictable way.
It helps in maintaining a single source of truth for the state of the entire application.
Redux follows a unidirectional data flow, making it easier to understand how data changes over time.
Actions are dispatched to update the state in Redux, and redu...
Hooks in React are functions that let you use state and other React features without writing a class.
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 useReducer.
useMemo is used for memoizing values, while useCallback is used for memoizing functions.
useMemo is used to memoize a value and only recompute it when its dependencies change.
useCallback is used to memoize a function instance and only re-create it when its dependencies change.
Example: useMemo can be used to memoize the result of a complex computation, while useCallback can be used to memoize a callback function passed t
Write code to check palindrome no. Sime basic react js task
NeoSOFT interview questions for designations
I applied via Recruitment Consulltant and was interviewed in Aug 2023. There was 1 interview round.
Type is used for defining custom data types in TypeScript, while interface is used for defining object shapes.
Type is more flexible and can be used to define unions, intersections, and primitive types.
Interface is more focused on defining the shape of an object and can be extended or implemented by other interfaces.
Type can also be used to create aliases for existing types, while interface cannot.
Example: type Person =...
Progressive web apps are web applications that provide a native app-like experience to users, with features like offline access and push notifications.
Progressive web apps use modern web capabilities to provide a user experience similar to native apps.
They are reliable, load quickly, and work offline.
They can be installed on the user's device and send push notifications.
Examples include Twitter Lite, Flipkart Lite, and
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posted on 2 Jan 2025
I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.
React js state and useeffect
Callbacks are functions passed as arguments, promises represent eventual completion of an asynchronous operation, async await is syntactic sugar for promises.
Callbacks are functions passed as arguments to be executed after a certain task is completed.
Promises represent the eventual completion of an asynchronous operation and allow chaining of multiple asynchronous operations.
Async await is syntactic sugar for promises,...
React has three main phases in its life cycle: Mounting, Updating, and Unmounting.
Mounting: Component is created and inserted into the DOM.
Updating: Component is re-rendered when props or state change.
Unmounting: Component is removed from the DOM.
I applied via Approached by Company and was interviewed in Jan 2024. There was 1 interview round.
Duration was 1 hr and topics were css html react js vs code IDE it was a good experience
posted on 5 Jun 2024
I applied via Referral and was interviewed before Jun 2023. There was 1 interview round.
Event loop is a mechanism in JavaScript that allows for asynchronous operations to be executed in a non-blocking way.
Event loop is responsible for handling asynchronous operations in JavaScript.
It allows for non-blocking execution of code by moving asynchronous tasks to the event queue.
Event loop continuously checks the call stack and the event queue, moving tasks from the queue to the stack when the stack is empty.
Exa...
Closures are functions that have access to their own scope, as well as the scope in which they were defined.
Closures allow functions to access variables from their outer scope even after the outer function has finished executing.
They are commonly used to create private variables in JavaScript.
Closures are created whenever a function is defined within another function.
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