Pairroxz Technologies Front end Developer Interview Questions and Answers

What is frount end devloper roulr what are they?

Java script and sig tagsand out put creat page ?

How to slowe the error css and it will take 5to 7min pass the next person it will work or their is any errror?

Q1. What is life cycle method What hooks you have used What is map filter and reduce How to make JavaScript asynchronous What is the difference between redux thunk and redux saga What is the benefit of arrow ...read more
Ans. 
Life cycle methods are methods that are automatically called at different stages of a component's life cycle in React.
• ComponentDidMount is called after the component has been rendered to the DOM.

• ComponentDidUpdate is called after the component's state or props have been updated.

• ComponentWillUnmount is called before the component is removed from the DOM.
Answered by AI
Add your answer

Q1. How to handle state in functional components.
Ans. 
State in functional components can be managed using the useState hook in React.
• Use the useState hook to declare state variables in functional components.

• useState returns an array with the current state value and a function to update that value.

• Example: const [count, setCount] = useState(0);

• State variables should be immutable, so always use the setter function to update them.
Answered by AI
Add your answer
Q2. What is event loop in javascript.
Add your answer
Q3. What is hosting in Javascript
Ans. 
Hosting in JavaScript refers to the process of declaring a variable or function before it is used in the code.
• Hosting allows you to use variables and functions before they are declared in the code.

• Variables are hoisted to the top of their scope, while functions are fully hoisted.

• Example: console.log(myVar); var myVar = 10; This will not throw an error because 'myVar' is hoisted to the top of the scope.
Answered by AI
View 1 more answer