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10+ bebo Technologies Interview Questions and Answers

Updated 21 Jan 2025

Q1. What is redux ? Explain its architecture ? How many parameters are there in connect method ?

Ans.

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 application's state changes in response to actions.

  • Store hold...read more

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Q2. What are callback function ? Give disadvantages

Ans.

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

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Q3. How can you improve website performance ?

Ans.

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 content delivery networks (CDNs) to store and deliver con...read more

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Q4. what is android app how to dev wht is version of android wht is sdk adk etc

Ans.

An Android app is a software application designed to run on Android devices. Android versions are named after desserts, with the latest being Android 12.

  • Android apps are developed using Java or Kotlin programming languages.

  • Android versions are named after desserts, such as KitKat, Oreo, and Pie.

  • SDK (Software Development Kit) is a set of tools used to develop apps for Android.

  • ADK (Accessory Development Kit) is used to create hardware accessories that work with Android devices.

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Q5. What is shadow DOM ?

Ans.

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:

    const shadowRoot = document.getElementById('myComponent').a...read more
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Q6. 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 using HTTP headers like Access-Control-Allow-Origin.

  • CORS is important for protecting sensitive data and preventing cross-site request forgery (CSRF) attac...read more

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Q7. what are the appin android to develp

Ans.

There are various apps in Android to develop, such as Android Studio, IntelliJ IDEA, Eclipse, etc.

  • Android Studio is the official IDE for Android app development

  • IntelliJ IDEA is a popular IDE for Android development

  • Eclipse with ADT plugin can also be used for Android development

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Q8. Data security implementation in apex like fields and objects to prevent unauthorized DMLS.

Ans.

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 measures

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Q9. what iss dk file in android

Ans.

A .dk file in Android is a Dex file, which is a compiled file format used by the Dalvik Virtual Machine.

  • Dex files contain compiled code and resources for an Android application.

  • They are generated by the Android build tools during the build process.

  • Dex files are executed by the Dalvik Virtual Machine on Android devices.

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Q10. What are Pillars of OOPs concepts and types of inheritance

Ans.

Pillars of OOPs concepts are Abstraction, Encapsulation, Inheritance, and Polymorphism. Types of inheritance include Single, Multiple, Multilevel, and Hierarchical.

  • Abstraction focuses on hiding the implementation details and showing only the necessary features.

  • Encapsulation bundles the data and methods that operate on the data into a single unit.

  • Inheritance allows a class to inherit properties and behavior from another class.

  • Types of inheritance include Single (one class inhe...read more

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Q11. what is grunt in android

Ans.

Grunt in Android is a build automation tool that helps in automating repetitive tasks like compiling code, running tests, and deploying apps.

  • Grunt is a JavaScript task runner that can be used to automate various tasks in Android development.

  • It can be used to compile code, run tests, minify files, and deploy apps.

  • Grunt uses a configuration file called 'Gruntfile.js' to define tasks and their configurations.

  • Plugins can be added to Grunt to extend its functionality and perform s...read more

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Q12. python code for reversing a string

Ans.

Python code to reverse a string using slicing

  • Use string slicing with a step of -1 to reverse the string

  • Example: 'hello'[::-1] will return 'olleh'

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Q13. what is jar file

Ans.

A jar file is a Java archive file that contains compiled Java classes and resources.

  • A jar file is created using the jar command in Java.

  • It is used for packaging Java classes and resources into a single file for distribution.

  • Jar files can be executed using the Java Runtime Environment (JRE).

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Q14. Integration practices and summary

Ans.

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

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Q15. what is vm ware?

Ans.

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.

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Q16. reverse of string

Ans.

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

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