Simplilearn Software Development Engineer Interview Questions and Answers

Answer on how to list in react and the input box

• Use the map function to create a list in React

• Use the state to store the input value

• Use onChange event to update the state when the input value changes

• Use onSubmit event to handle the form submission

I am a passionate software developer with a strong background in full-stack development and a love for problem-solving.

• Experience in JavaScript frameworks like React and Node.js, building dynamic web applications.

• Worked on a team project that improved application performance by 30% through code optimization.

• Strong understanding of database management with SQL and NoSQL technologies.

• Completed a personal project that inv...read more

typeof null returns 'object' in JavaScript.

• typeof null is 'object' in JavaScript

• This is a historical bug in JavaScript that has not been fixed for backward compatibility

• Example: console.log(typeof null) will output 'object'

React is a JavaScript library for building user interfaces. It is different from Angular in various ways.

• React is a library while Angular is a framework

• React uses virtual DOM while Angular uses real DOM

• React is more flexible and easier to learn than Angular

• Deep copy creates a new object with the same values while shallow copy creates a new reference to the same object

• Hoisting is a JavaScript mechanism where variables a...read more

Implement custom hooks and array flat method

• Custom hooks are reusable functions that allow you to extract component logic into reusable functions

• Array flat method is used to flatten an array of nested arrays into a single array

• To implement custom hooks, create a function that uses the useState and useEffect hooks

• To implement array flat method, use the reduce method to flatten the array