iSON Xperiences Front end Developer Interview Questions and Answers

Q1. Difference between foreach and map
Ans. 
foreach is used to iterate over an array without returning a new array, while map creates a new array by applying a function to each element.
• foreach does not return a new array, while map does

• foreach does not modify the original array, while map creates a new array

• foreach is used for iterating over elements, while map is used for transforming elements

• Example: foreach - array.forEach(item => console.log(item)), map - ar
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Q2. Explain rxjs operators
Ans. 
RxJS operators are functions that enable complex asynchronous operations and data manipulation in reactive programming.
• RxJS operators are used to transform, filter, combine, and create observables.

• Operators can be categorized into creation operators, transformation operators, filtering operators, combination operators, and utility operators.

• Examples of operators include map, filter, mergeMap, switchMap, debounceTime, a
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Find reverse string using array

Q1. What are Routing Guards?
Ans. 
Routing guards are used in Angular to control access to certain routes based on certain conditions.
• Routing guards are used to protect routes in Angular applications.

• They can be used to control access based on authentication status, user roles, etc.

• There are different types of routing guards like CanActivate, CanActivateChild, CanDeactivate, CanLoad.

• Example: CanActivate guard can be used to check if a user is authentica
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Q1. What is AOT And JIT How angular different from react Route guard
Ans. 
AOT (Ahead-of-Time) and JIT (Just-in-Time) are compilation techniques used in Angular. Angular and React differ in their architecture and data binding approach. Route guards in Angular are used to control access to routes.
• AOT compilation in Angular converts TypeScript code into efficient JavaScript code during the build process, resulting in faster rendering and smaller bundle sizes.

• JIT compilation in Angular compiles ...read more
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Q2. How angular application build
Ans. 
Angular applications are built using the Angular CLI, which provides a command-line interface for creating, building, and serving Angular projects.
• Angular applications are built using the Angular CLI (Command Line Interface)

• The Angular CLI provides commands for creating new projects, generating components, services, modules, etc.

• To build an Angular application, you can use the 'ng build' command which compiles the appl
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Q3. Project discussion
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Multiple questions and choice

Q1. Salary questions
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Q2. Only for end of the interview
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Q1. What are your salary expectations?
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Q2. What is your family background?
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Q3. Share details of your previous job.
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Q4. Why should we hire you?
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Q5. Why are you looking for a change?
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Q6. Where do you see yourself in 5 years?
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Q7. What are your strengths and weaknesses?
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Q8. Tell me about yourself.
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Q9. Tell me about your questions
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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. This is often the first question. Focus on your professional background, your key skills, and how your experiences align with the job you're applying for.
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Q2. Show that you’ve done your research about the company. Talk about how your values align with the company’s mission, and why the role interests you.
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2 DSA questions. Both medium level difficult

Q1. Controlled and Un Controlled components
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Q2. Hooks in functional components
Ans. 
Hooks are functions that let you use state and other React features in functional components.
• Hooks were introduced in React 16.8.

• useState() hook is used to add state to functional components.

• useEffect() hook is used for side effects in functional components.

• Custom hooks can be created to reuse logic across components.
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Developing features of Shopping Cart page like add to cart,remove from cart