ZingHR Interview Questions and Answers

Redux is a predictable state container for JavaScript apps. It helps manage the state of an application in a centralized way.

• Redux is a state management library commonly used with React.

• It allows for a single source of truth for the state of an application.

• Actions are dispatched to update the state, and reducers specify how the state changes in response to actions.

• Redux DevTools can be used to track state changes and debug the application.

• Selectors can be used to efficiently ...read more

useState is a hook in React that allows functional components to have state.

• useState is a React hook used in functional components to manage state.

• It returns an array with the current state value and a function to update that value.

• Example: const [count, setCount] = useState(0);

useEffect is a hook in React that allows performing side effects in function components.

• Used in React functional components to perform side effects

• Executes after render and after every update

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

Security aspects include confidentiality, integrity, availability, authentication, and non-repudiation.

• Confidentiality: Protecting sensitive information from unauthorized access.

• Integrity: Ensuring data is not modified or tampered with.

• Availability: Ensuring systems and data are accessible when needed.

• Authentication: Verifying the identity of users or systems.

• Non-repudiation: Preventing denial of actions or transactions.

Yes, SaaS stands for Software as a Service which is a cloud-based software delivery model.

• SaaS products are accessed through the internet and do not require installation on local devices.

• SaaS products are subscription-based and offer scalability and flexibility.

• Examples of SaaS products include Salesforce, Dropbox, and Google Apps.