You're building a blog with Next.js. You want each blog post to have a unique URL based on its title, but you don't want to create a new page component for each post. How would you achieve this?
- Use dynamic routing with Next.js by creating a [slug].js page that fetches the blog content based on the slug.
- Use static site generation (SSG) for all blog posts to create individual HTML files for each post during build time.
- Create a single page component and use query parameters in the URL to determine which blog post to display.
- Use server-side rendering (SSR) to fetch the blog content and render it dynamically based on the requested URL.
To achieve unique URLs for each blog post without creating a new page component for each post, you can use dynamic routing with Next.js by creating a [slug].js page that fetches the blog content based on the slug. This allows you to use a single page component to display different blog posts dynamically based on the URL. Static site generation (SSG) would create separate HTML files for each post, which is not necessary in this case. The other options are not the most efficient ways to achieve this.
In class components, the method used to fetch new props and state and decide whether a re-render should occur is ________.
- componentDidUpdate
- componentFetchUpdate
- componentWillUpdate
- shouldComponentUpdate
In class components, the method used to fetch new props and state and decide whether a re-render should occur is shouldComponentUpdate. This method allows you to control the re-rendering process by returning true or false based on conditions you specify. It's a key method for optimizing the performance of class components by preventing unnecessary re-renders.
Which of the following describes the main purpose of Render Props in React?
- Defining component propTypes.
- Managing component state.
- Reusing component logic.
- Styling components.
The main purpose of Render Props in React is reusing component logic. This technique allows you to pass a function as a prop to a child component, enabling that child to render something based on the parent's state or logic. It's particularly useful for sharing behavior or functionality between components without tying them to each other. While managing state can be a part of using Render Props, it's not the primary purpose.
To lazily load a component in React, you can use the ________ function.
- React.lazy()
- deferLoad()
- importLazy()
- lazyLoad()
To lazily load a component in React, you can use the React.lazy() function. This function allows you to dynamically import a component, which is especially useful for optimizing initial page load times by loading components only when they are needed, reducing the bundle size, and improving performance.
How would you best describe Firebase's authentication method concerning scalability?
- Firebase authentication is highly scalable.
- Firebase authentication is limited in scale.
- Firebase authentication is only suitable for small applications.
- Firebase authentication scalability depends on the pricing tier.
Firebase's authentication method is highly scalable. Firebase Authentication is designed to handle authentication at scale, making it suitable for both small and large applications. It provides various authentication methods like email/password, social login, and more, which can be scaled efficiently based on your application's needs.
You're building a tooltip component that should be flexible enough to display different content based on where it's used. Which pattern would best allow for this flexibility?
- Decorator Pattern
- Factory Method Pattern
- Observer Pattern
- Singleton Pattern
The Factory Method Pattern is the best choice for creating a tooltip component that can display different content based on its usage context. It allows you to define an interface for creating objects but lets subclasses alter the type of objects that will be created. In this case, different tooltip content can be created by subclasses while still adhering to a common interface. The other patterns listed are not typically used for this specific purpose.
Which hook would be best suited to manage the global state of an application?
- useContext
- useEffect
- useRef
- useState
The hook best suited to manage the global state of an application is useContext. useContext provides a way to share data (state) between components without prop drilling. It is often used in combination with useReducer or useState to manage global application state. While the other hooks have their use cases, useContext is specifically designed for global state management in React applications.
The Context API provides a way to pass data through the component tree without having to pass props down manually at every level using the ________ and ________ mechanism.
- Provider and Consumer
- State and Props
- Render Props and HOC
- Redux and MobX
The Context API in React provides the Provider and Consumer components, which allow data to be passed through the component tree without the need to manually pass props down at every level. This mechanism simplifies state management in complex React applications. While the other options are related to React state management, they do not specifically describe the Context API mechanism.
The method that provides detailed information about the error and the component stack where it happened is called ________.
- renderError
- componentErrorBoundary
- errorStack
- componentStack
The method that provides detailed information about the error and the component stack where it happened is called componentStack. This information is invaluable when debugging errors in React applications as it helps developers pinpoint the exact location and context of the error. The other options (renderError, componentErrorBoundary, and errorStack) are not standard methods in React for providing this specific information.
In Redux, the function that specifies how the state is transformed by actions is called ________.
- Action Creator Function
- Dispatcher Function
- Reducer Function
- State Modifier Function
In Redux, the function that specifies how the state is transformed by actions is called the "Reducer Function." Reducers take the current state and an action as input and return the new state based on that action. They are a crucial part of the Redux architecture for managing state changes in a predictable and consistent manner.