VISION Telecalling Executive Interview Questions and Answers

ReactJS is a popular JavaScript library for building user interfaces.

• ReactJS allows for reusable components, making development faster and more efficient.

• It uses a virtual DOM, which improves performance by minimizing updates to the actual DOM.

• ReactJS has a large and active community, providing support and resources for developers.

• It can be used for both web and mobile app development, with tools like React Native.

• Reac...read more

Functional components are stateless and rely on props, while class-based components have state and lifecycle methods.

• Functional components are written as functions and return JSX elements.

• Class-based components are written as ES6 classes and extend the React.Component class.

• Functional components are simpler and easier to test and understand.

• Class-based components have access to lifecycle methods like componentDidMount ...read more

Questions related to OOPS concepts in software engineering.

• Method overloading is having multiple methods with the same name but different parameters, while method overriding is having a method in a subclass with the same name and parameters as a method in its superclass.

• Inheritance is the ability of a class to inherit properties and methods from its parent class. It allows for code reuse and promotes modularity.

• Encapsu...read more

Answers to SQL related questions for Software Engineer interview

• Primary key uniquely identifies a record in a table, while unique key ensures that no two records have the same value for a specific column

• Normalization is used to eliminate data redundancy and improve data integrity. Types include 1NF, 2NF, 3NF, BCNF, 4NF, 5NF

• SQL queries can be used to retrieve data from one or more tables using joins. Delete and update s