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Frontend Frameworks Interview Q&A β Part 1 ππΌ
1οΈβ£ 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.
2οΈβ£ 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.
3οΈβ£ 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.
4οΈβ£ 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.
5οΈβ£ What are computed properties in Vue?
Answer: Computed properties are cached based on their dependencies and only re-evaluate when those dependencies change β great for performance and cleaner templates.
6οΈβ£ 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.
7οΈβ£ What are services in Angular?
Answer: Services are used to share data and logic across components. Theyβre typically injected using Angularβs dependency injection system.
8οΈβ£ 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.
9οΈβ£ 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.
π How do frameworks improve frontend development?
Answer: They offer structure, reusable components, state management, and better performance β making development faster, scalable, and more maintainable.
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