1️⃣ What are props in React?
Answer: Props (short for properties) are used to pass data from parent to child components. They are read-only and help make components reusable.
2️⃣ What is state in React?
Answer: State is a built-in object used to store dynamic data that affects how the component renders. Unlike props, state can be changed within the component.
3️⃣ What are React hooks?
*Answer:* Hooks like
useState, useEffect, and useContext let you use state and lifecycle features in functional components without writing class components.4️⃣ What are directives in Vue.js?
Answer: Directives are special tokens in Vue templates that apply reactive behavior to the DOM. Examples include
v-if, v-for, and v-bind.5️⃣ What are computed properties in Vue?
Answer: Computed properties are cached based on their dependencies and only re-evaluate when those dependencies change — great for performance and cleaner templates.
6️⃣ What is a component in Angular?
Answer: A component is the basic building block of Angular apps. It includes a template, class, and metadata that define its behavior and appearance.
7️⃣ What are services in Angular?
Answer: Services are used to share data and logic across components. They’re typically injected using Angular’s dependency injection system.
8️⃣ What is conditional rendering?
Answer: Conditional rendering means showing or hiding UI elements based on conditions. In React, you can use ternary operators or logical
&& to do this.9️⃣ What is the component lifecycle in React?
*Answer:* Lifecycle methods like
componentDidMount, componentDidUpdate, and componentWillUnmount manage side effects and updates in class components. In functional components, use useEffect.🔟 How do frameworks improve frontend development?
*Answer:* They offer structure, reusable components, state management, and better performance — making development faster, scalable, and more maintainable.
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