Resilient Lab Angular Developer Interview Questions and Answers

Q1. Angular routing
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Q2. What are pipes in angular
Ans. 
Pipes in Angular are used for transforming data in templates.
• Pipes are used to format data before displaying it in the view

• They can be used to filter, sort, or transform data in various ways

• Examples include date pipe, currency pipe, and uppercase/lowercase pipe
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Q1. Which version of java you use?
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I use Java version 8 for Angular development.
• I use Java 8 for its compatibility with Angular frameworks and libraries.

• Java 8 introduced features like lambda expressions and streams which are useful in Angular development.

• Example: I use Java 8 to write backend services for my Angular applications.
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Q2. What are the new features in java 8?
Ans. 
Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces provide a way to define interfaces with a single abstract method.

• Streams allow you to process collections of objects in a functional style.

• Default methods allow you to add new methods to interfaces wit
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Q1. How to pass data from component to another component
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Q2. Life cycle hooks
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Q3. Observables&subject
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Q1. Tell me about your experience.
Ans. 
I have 5 years of experience in developing web applications using Angular.
• Developed responsive web applications using Angular framework

• Implemented RESTful APIs to fetch and update data

• Worked on optimizing performance and improving user experience

• Collaborated with UI/UX designers to create visually appealing interfaces
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Q2. What is directive
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A directive in Angular is a class with a @Directive decorator that allows you to attach behavior to elements in the DOM.
• Directives are used to manipulate the DOM, add behavior to elements, and create reusable components.

• There are three types of directives in Angular: Component, Structural, and Attribute directives.

• Examples of directives include ngIf, ngFor, and ngStyle.
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Q1. How do you implement a login page
Ans. 
Implementing a login page involves creating a form for users to input their credentials and validating them against a database.
• Create a login form with fields for username and password

• Use Angular's form validation to ensure required fields are filled out

• Send the user's credentials to a backend server for authentication

• Upon successful authentication, redirect the user to the main application page
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Q1. How would you share data between two unrelated angular components
Ans. 
Using a shared service to communicate data between unrelated components in Angular.
• Create a shared service with a BehaviorSubject to store and emit data

• Inject the shared service into both components that need to share data

• Subscribe to the BehaviorSubject in each component to receive updates
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Q2. How do we do lazy loading
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Lazy loading in Angular allows for loading modules only when they are needed, improving performance.
• Lazy loading is achieved by using the loadChildren property in the route configuration.

• Modules are loaded asynchronously when the user navigates to a route that requires them.

• Lazy loading helps reduce the initial bundle size and improve the app's loading time.

• Example: { path: 'admin', loadChildren: () => import('./admin/
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Q3. How would you take care of XSS vulnerability
Ans. 
Prevent XSS vulnerability by sanitizing user input, using Angular's built-in security features, and implementing Content Security Policy.
• Sanitize user input by using Angular's DomSanitizer to prevent execution of malicious scripts

• Use Angular's built-in security features like SafeValue and SafeHtml to securely render user input

• Implement Content Security Policy (CSP) to restrict the sources from which scripts can be load...read more
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Q4. How do you take data from more than one service at a time in a component
Ans. 
Use observables and combineLatest operator to fetch data from multiple services in a component
• Create observables for each service call

• Use combineLatest operator to combine the observables and fetch data from all services at once

• Subscribe to the combined observable to get the data
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Q1. Angular lifecycle
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Q2. Pipes
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Q1. Building blocks of angular
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Building blocks of Angular include components, modules, services, directives, templates, and dependency injection.
• Components are the basic building blocks of Angular applications.

• Modules help organize the application into cohesive blocks of functionality.

• Services are reusable code that can be injected into components.

• Directives add behavior to the DOM elements.

• Templates define the view of the application.

• Dependency inj...read more
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Q2. Define Pipes and its types
Ans. 
Pipes in Angular are used to transform data before displaying it in the view.
• Pipes are used to format data in templates.

• There are built-in pipes like DatePipe, UpperCasePipe, LowerCasePipe, etc.

• Custom pipes can be created using @Pipe decorator.

• Pipes can be chained together for complex transformations.

• Example: {{ birthday | date:'dd/MM/yyyy' }} will format the birthday date.
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Q1. Hooks, Parent-child communication, javascript questions like closure
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Javascript simple coding test, writing services

Q1. Nothing much, salary discussion
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