NeoSOFT Interview Questions, Process, and Tips

Q1. What is the different between useMemo and useCallback?
Ans. 
useMemo is used for memoizing a value, while useCallback is used for memoizing a function.
• useMemo is used to memoize a value and recompute it only when its dependencies change.

• useCallback is used to memoize a function and recompute it only when its dependencies change.

• Example: useMemo can be used to memoize the result of a complex computation, while useCallback can be used to memoize a callback function passed to a chi
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Q2. What is Event looping
Ans. 
Event looping is the process in which a programming language continuously checks for and executes events in a non-blocking manner.
• Event looping allows for asynchronous operations to be handled efficiently.

• It involves a queue of events waiting to be processed, with the event loop continuously checking for new events to execute.

• Commonly used in JavaScript to handle user interactions, network requests, and timers.
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Q3. What is difference between map and forEach loop?
Ans. 
map creates a new array with the results of calling a provided function on every element, while forEach executes a provided function once for each array element.
• map returns a new array with the same length as the original array, while forEach does not return anything.

• map does not mutate the original array, while forEach can mutate the original array.

• map is more suitable for transforming data and creating a new array, w...read more
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Q4. What is closure?
Ans. 
Closure is the ability of a function to access its lexical scope even after the function has been executed.
• Closure allows a function to access variables from its outer scope even after the function has finished executing.

• It is created when a function is defined within another function and the inner function references variables from the outer function.

• Closure is commonly used in event handlers, callbacks, and in creati
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Q5. What is useEffect hook?
Ans. 
useEffect is a hook in React that allows side effects to be performed in function components.
• Used to perform side effects in function components

• Executes after render

• Can be used to fetch data, subscribe to events, update the DOM, etc.

• Takes a function as the first argument and an optional array of dependencies as the second argument
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1 - How many type of making center the div elements
2 - let a = [2,4,6,a,b,c] output a = [4,8,12, a2, b2, c2]
3- Reverse the character and remove duplicate word in the string

Q1. How to solve complex problems
Ans. 
To solve complex problems, break them down into smaller parts, analyze each part, brainstorm solutions, and test them.
• Break down the problem into smaller, more manageable parts

• Analyze each part to understand its function and impact on the overall problem

• Brainstorm potential solutions, considering different perspectives and approaches

• Test the solutions to see which ones work best and iterate as needed
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Q2. Angular coding round test and theory questions
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Q1. What is difference between get props and set props
Ans. 
get props is used to retrieve the value of a property in React components, while set props is used to update the value of a property.
• get props is used to access the value of a property passed down from a parent component

• set props is used to update the value of a property in the current component

• Example: get props - accessing the 'name' prop in a child component: this.props.name

• Example: set props - updating the 'count' ...read more
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Q2. What is difference between get for each and map
Ans. 
get forEach is used to iterate over elements in 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 returns a new array with the results of applying a function to each element

• forEach is used for side effects, while map is used for transforming data

• forEach does not return anything, while map returns a new array

• Example...read more
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Q3. Difference between put and patch
Ans. 
PUT is used to update or replace an entire resource, while PATCH is used to update or modify part of a resource.
• PUT is idempotent, meaning multiple identical requests will have the same effect as a single request.

• PATCH is not necessarily idempotent, as multiple identical requests may have different effects.

• PUT requires the client to send the entire updated resource, while PATCH only requires the client to send the spec...read more
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Q4. Difference between local storage session storage
Ans. 
Local storage is persistent and stays until manually cleared, while session storage is temporary and cleared when the browser is closed.
• Local storage data persists even after closing the browser

• Session storage data is cleared when the browser is closed

• Both store data as key-value pairs similar to cookies
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Q1. What is .Net Core ?
Ans. 
.Net Core is a free, open-source, cross-platform framework for building modern, cloud-based, internet-connected applications.
• Developed by Microsoft as the successor to the .NET Framework

• Supports multiple operating systems like Windows, macOS, and Linux

• Provides high performance and scalability for web applications

• Includes a modular and lightweight runtime called CoreCLR

• Allows developers to use C#, F#, and Visual Basic
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Q2. What is benefit of Microservices ?
Ans. 
Microservices offer benefits such as scalability, flexibility, and easier maintenance.
• Scalability: Microservices allow for individual components to be scaled independently, leading to better resource utilization.

• Flexibility: Each microservice can be developed, deployed, and updated independently, allowing for more flexibility in the development process.

• Easier maintenance: With microservices, it is easier to identify an...read more
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Q3. What is ViewBag and ViewData ?
Ans. 
ViewBag and ViewData are used in ASP.NET MVC to pass data from controller to view.
• ViewBag is a dynamic property that allows you to pass data from controller to view.

• ViewData is a dictionary object that allows you to pass data from controller to view.

• ViewBag is a dynamic object while ViewData is a dictionary object.

• Example: ViewBag.Title = 'Home Page'; ViewData['Message'] = 'Welcome to my website';
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Q4. What is CORS ?
Ans. 
CORS stands for Cross-Origin Resource Sharing, a security feature that allows servers to specify who can access their resources.
• CORS is a security feature implemented by browsers to prevent unauthorized access to resources on a different origin.

• It allows servers to specify which origins are allowed to access their resources through HTTP headers.

• CORS is commonly used to enable cross-origin requests in web applications, ...read more
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Q5. Explain JWT in Brief.
Ans. 
JWT is a compact, self-contained way to securely transmit information between parties as a JSON object.
• JWT stands for JSON Web Token.

• It consists of three parts: header, payload, and signature.

• It is commonly used for authentication and information exchange in web development.

• Example: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf3
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Q1. Tell me about yourself.
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Q2. Difference between let, var ,const
Ans. 
let, var, and const are all used for variable declaration in JavaScript, but they have different scopes and behaviors.
• let has block scope and can be reassigned, var has function scope and can be reassigned, const has block scope and cannot be reassigned

• Using let:

• let x = 10;

• x = 20; // valid

• Using var:

• var y = 5;

• y = 8; // valid

• Using const:

• const z = 15;

• z = 25; // invalid
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Q3. Difference between authorization and authentication
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Q4. What are private routes in nextjS?
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Q5. Difference between SSR and CSR?
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Q6. The architecture of nextJS.
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Q7. Currying in javascript
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Q1. What are AOT and JIT in Angular?
Ans. 
AOT and JIT are compilation techniques in Angular.
• AOT (Ahead-of-Time) compilation is done at build time, converting TypeScript and HTML code into efficient JavaScript code before the browser runs it.

• JIT (Just-in-Time) compilation is done at runtime, converting TypeScript and HTML code into JavaScript code while the application is running.

• AOT improves performance by reducing the size of the bundle and optimizing the cod...read more
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Q2. Observables vs promises
Ans. 
Observables are streams of data that can be subscribed to, while promises are a single future value.
• Observables can handle multiple values over time, while promises can only handle a single value.

• Observables are cancellable, while promises are not.

• Observables support operators like map, filter, and reduce for data transformation.

• Promises have a simpler API with just then and catch methods.

• Observables are lazy, meaning ...read more
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Q3. What is data binding and types?
Ans. 
Data binding is the automatic synchronization of data between the model and view components in an application.
• Data binding allows for the seamless updating of data in the model and reflecting those changes in the view without manual intervention.

• There are two types of data binding in Angular: one-way binding and two-way binding.

• One-way binding updates the view when the model changes, while two-way binding updates both ...read more
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Q4. What is closure?
Ans. 
Closure is a function that has access to its own scope, as well as the scope of its outer function.
• A closure allows a function to access variables from its outer function even after the outer function has finished executing.

• Closures are commonly used in JavaScript to create private variables and functions.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(oute
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Q5. Lazyloading in angular
Ans. 
Lazy loading in Angular is a technique used to load modules only when they are needed, improving performance.
• Lazy loading helps reduce initial load time by loading modules on demand

• Implemented using loadChildren property in routes configuration

• Lazy loaded modules have their own routes and components
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Q6. Directives in Angular and Types
Ans. 
Directives in Angular are markers on a DOM element that tell Angular to attach a specified behavior to that DOM element or transform the DOM element and its children.
• Directives are used to create reusable components in Angular.

• 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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Pagination task and filter table data

Q1. React life cycles
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Q2. Server side rendering
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Q3. Deep and shadow copy
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Q4. Ecmascript6 and latest updates with example
Ans. 
ES6 is the latest version of ECMAScript with new features like arrow functions, classes, and template literals.
• Arrow functions provide a more concise syntax for writing functions.

• Classes allow for easier object-oriented programming in JavaScript.

• Template literals make it easier to work with strings by allowing interpolation and multiline strings.
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Creating react componont with api integration, list rendering and adding custom filterals

Coding exercise, custom hooks, UI related quetions