Open LM Angular Frontend Developer Interview Questions and Answers

Q1. Sort array without using merhods
Ans. 
Sort array without using methods
• Iterate through the array and compare each element with the rest to find the correct position

• Swap elements if necessary to sort the array in ascending order

• Repeat the process until the array is fully sorted
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Q2. Reverse string without methods
Ans. 
Reverse a string without using built-in methods
• Create an empty string to store the reversed string

• Iterate through the input string from the last character to the first

• Append each character to the empty string to reverse the input string
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Q3. How to apply ngclass
Ans. 
ngClass is used to conditionally apply CSS classes to an element in Angular.
• Use ngClass directive in the template with an object or array of classes and conditions

• Classes are applied when the condition is true, and removed when false

• Example:
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Q4. Angular Interceptors concept ?
Ans. 
Angular interceptors are a way to intercept HTTP requests and responses to perform operations like logging, modifying requests, or handling errors.
• Interceptors can be used to modify outgoing requests or incoming responses.

• They can be used for tasks like adding headers, logging requests, handling errors, or transforming data.

• Interceptors are implemented as services that implement the HttpInterceptor interface.

• Multiple i...read more
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Q5. Entry point of angular
Ans. 
The entry point of Angular is typically the main.ts file.
• Main.ts file is the first file that is executed when an Angular application is started.

• It bootstraps the AppModule, which is the root module of the application.

• Main.ts file also imports other necessary modules and components required for the application to run.
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Q1. Difference between position absolute and relative in css
Ans. 
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?
Ans. 
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?
Ans. 
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?
Ans. 
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?
Ans. 
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?
Ans. 
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. Angular Life cycle hooks, subject, rxjs, ngdestory
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Q2. About the project and graph library used in project.
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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
Ans. 
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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