Noise React Js Frontend Developer Interview Questions and Answers

Codding test for machine round

Q1. Technical questions
Add your answer
Q2. Technical questions 2
Add your answer

Q1. Personal details round
Add your answer
Q2. Salary desscuss
Add your answer

Q1. What are class and functional components
Ans. 
Class components are ES6 classes that extend React.Component and have a render method. Functional components are simple functions that return JSX.
• Class components are created using ES6 classes and have a state property.

• Functional components are stateless and do not have a state property.

• Class components can have lifecycle methods like componentDidMount, componentDidUpdate, etc.

• Functional components are simpler and easi...read more
Answered by AI
Add your answer
Q2. Have you ever used hooks?
Ans. 
Yes, I have used hooks extensively in my React Native projects.
• Yes, I have used useState hook to manage component state.

• Yes, I have used useEffect hook for side effects like data fetching.

• Yes, I have used custom hooks to reuse logic across components.
Answered by AI
Add your answer

Q1. Difference b/w deep copy and shallow copy
Ans. 
Deep copy creates a new copy of an object with all nested objects also copied, while shallow copy creates a new object with references to the original nested objects.
• Deep copy creates a new object and recursively copies all nested objects, resulting in a completely independent copy.

• Shallow copy creates a new object but only copies the references to nested objects, so changes in nested objects reflect in both the origin...read more
Answered by AI
Add your answer
Q2. Difference between foreach and map
Ans. 
foreach is used to iterate over an array and perform a function on each element, while map creates a new array by applying a function to each element.
• foreach does not return a new array, while map does

• foreach is used for side effects, while map is used for transformation

• Example: forEach - let numbers = [1, 2, 3]; numbers.forEach(num => console.log(num)); // prints 1, 2, 3

• Example: map - let numbers = [1, 2, 3]; let doub...read more
Answered by AI
Add your answer
Q3. Pure impure pipe
Add your answer
Q4. Ngonchanges usage
Add your answer
Q5. Basic array methods
Add your answer
Q6. Difference null undefined empty values in js
Ans. 
null is an intentional absence of any value, undefined means a variable has been declared but not assigned a value, and empty values are variables that have been assigned a value of empty string, empty array, or empty object.
• null is used to represent the intentional absence of any value

• undefined means a variable has been declared but not assigned a value

• Empty values can be empty string (''), empty array ([]), or empty
Answered by AI
Add your answer

Q1. No question from hr and team
Add your answer

Q1. How to improve buisness
Ans. 
To improve business, focus on customer satisfaction, streamline processes, invest in marketing, and analyze data.
• Focus on customer satisfaction by providing excellent customer service and addressing feedback promptly.

• Streamline processes to increase efficiency and reduce costs. For example, automate repetitive tasks or implement a new CRM system.

• Invest in marketing to reach a wider audience and attract new customers. C...read more
Answered by AI
Add your answer

Q1. Salary and and up and down
Add your answer

Q1. Sap and crm usage
Add your answer
Q2. Behavioural and aptitude assessment
Add your answer

Q1. Web api , sql, basics
Add your answer
Q2. Design pattern, Solid principles,
Add your answer

Sort an array using a sort algorithm

Politics in india and rest of asis