bebo Technologies Interview Questions and Answers

Callback functions are functions passed as arguments to other functions to be executed later.

• Used in event handling, asynchronous operations, and to achieve higher order functions

• Disadvantages include callback hell, difficult to read and maintain code, and potential for memory leaks

• Example: setTimeout function in JavaScript takes a callback function as an argument

Shadow DOM is a way to encapsulate the styling and structure of a web component, preventing styles from leaking out or clashing with the rest of the page.

• Shadow DOM allows for creating self-contained components with their own DOM tree and styling.

• It helps in preventing styles from the main document affecting the component and vice versa.

• Shadow DOM can be created using the 'attachShadow' method in JavaScript.

• Example: read more

Redux is a predictable state container for JavaScript apps. It helps manage application state in a single immutable store.

• Redux is a state management library for JavaScript applications.

• It follows a unidirectional data flow architecture.

• Redux architecture consists of actions, reducers, store, and middleware.

• Actions are payloads of information that send data from the application to the store.

• Reducers specify how the app...read more

I am a Reactjs Developer with experience in building responsive web applications.

• Developed a responsive e-commerce website using React, Redux, and Material-UI

• Implemented authentication and authorization using Firebase in a social media application

• Optimized performance by lazy loading components and code splitting

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 using HTTP headers like Access-Control-Allow-Origin.

• CORS is important for protecting sensitive d...read more

Improving website performance involves optimizing code, reducing server requests, and utilizing caching techniques.

• Optimize code by removing unnecessary code, minifying and compressing files, and using efficient algorithms.

• Reduce server requests by combining files, using asynchronous loading, and implementing lazy loading for images and videos.

• Utilize caching techniques such as browser caching, server-side caching, and...read more

I have used tools like Git, Webpack, Babel, ESLint, and Redux in my previous organization.

• Git for version control

• Webpack for bundling

• Babel for transpiling

• ESLint for code linting

• Redux for state management

Seeking new challenges and opportunities for growth.

• Looking for opportunities to work on more complex projects

• Desire to learn new technologies and expand skill set

• Seeking a more collaborative team environment

• Want to advance career and take on more responsibilities

Function to reverse a given string input.

• Create a function that takes a string as input

• Use built-in functions like reverse() or loop through the string to reverse it

• Return the reversed string

VMware is a virtualization software company that provides cloud computing and platform virtualization software and services.

• VMware is a company specializing in virtualization software.

• It allows multiple operating systems to run on a single physical machine.

• VMware products include VMware Workstation, VMware Fusion, and VMware vSphere.

• VMware helps in reducing hardware costs and increasing efficiency in IT environments.

Implementing data security in Apex to prevent unauthorized DML operations on fields and objects.

• Use field-level security to restrict access to sensitive fields

• Implement object-level security using profiles and permission sets

• Utilize Apex sharing rules to control record-level access

• Consider using custom validation rules to enforce data integrity

• Implement triggers to enforce additional business logic and security measure

Integration practices involve connecting different systems to share data and functionality.

• Use APIs to connect systems and exchange data

• Implement middleware like MuleSoft or Dell Boomi for seamless integration

• Leverage Salesforce Connect to access external data sources within Salesforce

• Consider batch processing for large data transfers

• Implement error handling and monitoring for robust integrations