Q31. What are inline conditional expressions?
You can use either _if statements_ or _ternary expressions_ which are available in JS(and JSX in React) to conditionally execute or render expressions. Apart from these a...
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Q32. What is file based routing in Next.js?
**File-based routing** is an architectural pattern where application URL routes are inferred automatically from the folder and file hierarchy on the filesystem, eliminati...
Q33. What is a unary function?
A unary function (also known as a **monadic** function) is a function that **accepts exactly one argument**. The term "unary" simply refers to the function's arity—the nu...
Q34. What is "key" prop and what is the benefit of using it in arrays of elements?
A `key` is a special attribute you **should** include when mapping over arrays to render data. _Key_ prop helps React identify which items have changed, are added, or are...
Q35. What are the key features of Next.js?
- Server Side Rendering (SSR): Next.js allows rendering React components on the server before sending them to the client, improving performance and SEO. - Static Site Gen...
Q36. What is the currying function?
**Currying** is the process of transforming a function with **multiple arguments** into a sequence of **nested functions**, each accepting **only one argument** at a time...
Q37. What are the differences between Next.js and React.js?
| Feature | Next.js | React.js | | ------------------ | --------------------------------------------------------------------------------------------------------------- | ...
Q38. What is a pure function?
A **pure function** is a function whose output depends only on its input arguments and produces no side effects. This means that given the same inputs, a pure function wi...
Q39. How Virtual DOM works?
The _Virtual DOM_ works in five simple steps. **1. Initial Render** When a UI component renders for the first time, it returns JSX. React uses this structure to create a ...
Q40. What is the difference between client-side and server-side rendering in Next.js?
Client-side rendering (CSR) means that the browser fetches the JavaScript and renders the page on the client side, while server-side rendering (SSR) means that the server...