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CoreFlex Solutions Front end Developer Interview Questions and Answers
CoreFlex Solutions Front end Developer Interview Experiences
1 interview found
shital khangar
Selected
I applied via Naukri.com
(3 Questions)
- Q1. What is use for usememo
- Ans.
useMemo is a React hook used for memoizing expensive computations and optimizing performance.
useMemo is used to memoize the result of a function or computation.
It takes a function and an array of dependencies as arguments.
The function is only re-executed if any of the dependencies change.
It returns the memoized value, which can be used in the component.
It is useful for optimizing performance by avoiding unnecessary re-
- Q2. What use for Useeffect
- Ans.
The useEffect hook is used in React to perform side effects in functional components.
It is used to handle side effects like data fetching, subscriptions, or manually changing the DOM.
It runs after every render and can be used to replace lifecycle methods like componentDidMount and componentDidUpdate.
It takes two arguments: a function that contains the side effect logic, and an optional array of dependencies.
The functio...
- Q3. What is semantic elements
- Ans.
Semantic elements are HTML tags that give meaning to the content they wrap, making it more accessible and SEO-friendly.
Semantic elements provide structure and context to web pages.
They help search engines understand the content better.
Examples of semantic elements include
,
(1 Question)
- Q1. What is use for usememo
- Ans.
useMemo is a React hook used to memoize the result of a function and optimize performance.
useMemo is used to cache the result of a function and only recompute it when its dependencies change.
It is useful for optimizing expensive calculations or preventing unnecessary re-rendering of components.
Example: useMemo(() => calculateExpensiveValue(a, b), [a, b])
The memoized value is returned by useMemo and can be used in the c
Skills evaluated in this interview
Interview questions from similar companies
Front end Developer Interview Questions & Answers
Ideas2IT Technologies
Anonymous
posted on 25 Jul 2024
(2 Questions)
- Q1. Debouncing in react
- Ans.
Debouncing in React is a technique used to limit the number of times a function is called in a specified time frame.
Debouncing helps in improving performance by reducing unnecessary function calls.
It is commonly used in scenarios like search bars where we want to wait for user to finish typing before making an API call.
Example: Using lodash debounce function to delay API call until user stops typing.
- Q2. Throttling in react
- Ans.
Throttling in React helps limit the number of times a function is called within a specified time frame.
Throttling is used to improve performance by reducing the number of times a function is executed.
It is commonly used in scenarios like handling scroll events or input changes.
Example: Using lodash's throttle function to limit the rate of execution of a function.
Basic in array and function and es6 concepts
Skills evaluated in this interview
Selected
I applied via Company Website and was interviewed before Jul 2022. There were 5 interview rounds.
A screening test on javascript was conducted.
(1 Question)
- Q1. Technical interview question was base on your role. Oops concept is must. Html, css, react questions are asked in depth
I was asked to build a weather app using react in 24 hours, where the APIs where provided. Unit test cases was optional.
(1 Question)
- Q1. Normal HR questions. Some technical questions were also asked.
Interview Preparation Tips
shubham soni
I was interviewed in Apr 2021.
Interview Questionnaire
1 Question
- Q1. Closure, hoisting,basic functionality
Interview Preparation Tips
Front end Developer Interview Questions & Answers
Ideas2IT Technologies
Anonymous
posted on 25 Jul 2024
(2 Questions)
- Q1. Debouncing in react
- Ans.
Debouncing in React is a technique used to limit the number of times a function is called in a specified time frame.
Debouncing helps in improving performance by reducing unnecessary function calls.
It is commonly used in scenarios like search bars where we want to wait for user to finish typing before making an API call.
Example: Using lodash debounce function to delay API call until user stops typing.
- Q2. Throttling in react
- Ans.
Throttling in React helps limit the number of times a function is called within a specified time frame.
Throttling is used to improve performance by reducing the number of times a function is executed.
It is commonly used in scenarios like handling scroll events or input changes.
Example: Using lodash's throttle function to limit the rate of execution of a function.
Basic in array and function and es6 concepts
Skills evaluated in this interview
Selected
I applied via Recruitment Consulltant and was interviewed before Jul 2023. There were 2 interview rounds.
(2 Questions)
- Q1. Closers along with mcq on closers
- Q2. Event loop detailed explanation
- Ans.
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 the execution of code in JavaScript.
It allows for asynchronous operations to be executed without blocking the main thread.
Tasks are added to the event queue and executed in the order they were added.
Event loop continuously checks the call stack and the event queue t
Normal react counter question, lifecycle method
Skills evaluated in this interview
Selected
I applied via LinkedIn and was interviewed before Mar 2022. There were 4 interview rounds.
(1 Question)
- Q1. Basic questions of JavaScript and other stuffs related to the role for which the candidate has applied. It was an online test not an interview discussion
(1 Question)
- Q1. A technical round discussing about my skills, experiences, background and other questions related to the tech stack the candidate is applying. The interview questions were quite in depth and the interviewe...
(1 Question)
- Q1. Behavioral questions, leadership questions and basic informational questions
Interview Preparation Tips
Selected
I applied via Company Website and was interviewed before Jul 2022. There were 5 interview rounds.
A screening test on javascript was conducted.
(1 Question)
- Q1. Technical interview question was base on your role. Oops concept is must. Html, css, react questions are asked in depth
I was asked to build a weather app using react in 24 hours, where the APIs where provided. Unit test cases was optional.
(1 Question)
- Q1. Normal HR questions. Some technical questions were also asked.
Interview Preparation Tips
I was interviewed in Apr 2021.
Interview Questionnaire
1 Question
- Q1. Closure, hoisting,basic functionality
Interview Preparation Tips
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