Wescot Angular Frontend Developer Interview Questions and Answers

Q1. Basic angular questions
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Q2. Scenario based questions
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Q3. NgRx related questions
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Q1. MCQ questioons were there based on angular framework
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Q2. Services mcq were there
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Q1. What is Dependecy Injection
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Dependency Injection is a design pattern in which a class receives its dependencies from external sources rather than creating them itself.
• Allows for easier testing by injecting mock dependencies

• Promotes reusability and modularity by decoupling components

• Reduces code duplication by centralizing dependency creation

• Example: Angular uses Dependency Injection to provide services to components
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Q2. What is routing
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Routing is the process of navigating between different pages or views in a web application.
• Routing allows users to move between different parts of a web application without reloading the entire page

• It is implemented using a router module in Angular, which maps URLs to components

• Routes can have parameters that can be passed to components for dynamic content

• Routing can be used to create single-page applications (SPAs) wh
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Q1. Difference between position absolute and relative in css
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Position absolute removes element from normal flow, relative keeps element in flow but can be positioned.
• Position absolute removes element from normal flow, allowing it to be positioned relative to its closest positioned ancestor.

• Position relative keeps element in normal flow but allows it to be positioned relative to its normal position.

• Position absolute elements are not affected by other elements and can overlap, whi...read more
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Q1. Deep questions about angular and javascript basics
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Q1. Create a reactive form and save data in API with proper validation?
Ans. 
Create a reactive form in Angular to save data in API with validation
• Create a reactive form using FormBuilder in Angular

• Add form controls with proper validation rules using Validators

• Handle form submission and send data to API using HttpClient

• Implement error handling for API requests

• Display success or error messages to the user
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Q2. What is Auth-gaurd?
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Auth-guard is a feature in Angular that controls access to routes based on user authentication status.
• Auth-guards are used to protect routes in Angular applications by checking if a user is authenticated before allowing access.

• They can be implemented using canActivate interface in Angular.

• Auth-guards can redirect unauthenticated users to a login page or display an error message.

• They are commonly used in applications wi...read more
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Q3. How many ways we can communicate in Angular component?
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There are multiple ways to communicate in Angular components, including Input, Output, ViewChild, and Services.
• Input - parent component can pass data to child component using @Input decorator

• Output - child component can emit events to parent component using @Output decorator

• ViewChild - parent component can access child component using @ViewChild decorator

• Services - components can communicate through shared services
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Q4. Find longest word from string in JS?
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Use JavaScript to find the longest word in a string.
• Split the string into an array of words using split() method.

• Iterate through the array and compare the length of each word to find the longest one.

• Return the longest word found.
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Q1. Your Career Journey?
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I started my career as a web developer, specializing in frontend technologies like Angular. I have worked on various projects and gained valuable experience.
• Started career as web developer

• Specialized in frontend technologies like Angular

• Worked on various projects

• Gained valuable experience
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Q2. Your experties?
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I have expertise in developing Angular frontend applications with strong knowledge of TypeScript, HTML, CSS, and Angular frameworks.
• Strong knowledge of TypeScript, HTML, and CSS

• Experience in developing Angular frontend applications

• Familiarity with Angular frameworks like AngularJS, Angular 2+, Angular Material

• Understanding of reactive programming and observables in Angular

• Knowledge of state management with tools like N
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Q1. What is Lazy loading
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Q1. What are the time queue, etc in API
Ans. 
Time queue in API refers to managing requests in a sequential order.
• Time queue ensures that API requests are processed in the order they are received.

• It helps in preventing overload on the server by limiting the number of concurrent requests.

• Examples include using promises or async/await in JavaScript to handle API calls sequentially.
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Q2. What is the meaning of preflight in API? (All questions are related to dev oops profile. I applied for Angular)
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Q1. Closure in Java script
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Closure in JavaScript allows a function to access variables from its outer scope even after the function has finished executing.
• Closure is created when a function is defined within another function and the inner function references variables from the outer function.

• The inner function maintains a reference to the outer function's scope even after the outer function has finished executing.

• Closures are commonly used in ev...read more
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