HCL Group User Interface and Angular Developer Interview Questions, Process, and Tips

Q1. Angular Lifecycle
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Q2. Types of compilations in Angular
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There are two types of compilations in Angular: Just-in-Time (JIT) compilation and Ahead-of-Time (AOT) compilation.
• Just-in-Time (JIT) compilation: Compiles the Angular application in the browser at runtime. Slower startup time but easier development process.

• Ahead-of-Time (AOT) compilation: Compiles the Angular application during the build process before the browser downloads and runs the code. Faster startup time but r
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Q3. 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 elements in the DOM

• Templates define the UI of the application

• Dependency injecti...read more
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Q1. How to share data one component to another
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Using services or @Input/@Output decorators to share data between components
• Use services to create a shared data service that can be injected into multiple components

• Use @Input decorator to pass data from parent to child component

• Use @Output decorator with EventEmitter to emit events and pass data from child to parent component
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Q2. Http request in angular
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Http request in Angular is used to fetch data from a server or API.
• Use HttpClient module to make HTTP requests in Angular

• Subscribe to the Observable returned by the HTTP request to get the data

• Handle errors using catchError operator

• Set headers, query parameters, and request body as needed
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Angular basics and structure, Forms, Unit testing based(testbed)..

Q1. Pipe, Forms, Directives, Route Guards, Routing, HTTP Interceptor, Subject vs Behaviour Subject, Dom Sanitizing, ViewChildren, Data transfer between two components, What test case are you following?
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Q2. Swapping the number program
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Swapping the numbers in a program involves exchanging the values of two variables.
• Create a temporary variable to store one of the values

• Assign the value of the first variable to the second variable

• Assign the value of the temporary variable to the first variable
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Q1. What are the time queue, etc in API
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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. Basic interview questions on angular
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Q1. Advanced interview questions on angular
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Basic angular application without using server

Q1. Life cycle hooks
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Q2. Observable and subscription
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Q1. Javascript questions
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