Seekex Technologies Front end Developer Interview Questions and Answers

Memoization is a technique used to optimize performance by storing the results of expensive function calls and returning the cached result when the same inputs occur again.

• Memoization helps to avoid redundant calculations by storing the results of function calls.

• It can be implemented using libraries like 'memo' in React or manually by storing results in a cache.

• Memoization is commonly used in React to optimize renderin...read more

Promise is used for asynchronous operations with a single result, while Promise.all is used for handling multiple promises simultaneously.

• Promise is used for handling asynchronous operations with a single result

• Promise.all is used for handling multiple promises simultaneously

• Promise.all waits for all promises to resolve or any one to reject

React is a lightweight library for building user interfaces, while Angular is a full-fledged framework with more features and conventions.

• React is more flexible and allows for more control over the code structure.

• Angular provides more out-of-the-box features like routing, forms, and HTTP client.

• React is easier to learn for beginners due to its simplicity.

• Angular has a steeper learning curve but offers more built-in too...read more

Promise.all is used to handle multiple promises concurrently and wait for all of them to resolve.

• Use Promise.all when you need to make multiple asynchronous calls and wait for all of them to complete before proceeding.

• It is useful for scenarios like fetching data from multiple APIs and processing them together.

• Example: Promise.all([fetch('url1'), fetch('url2')]).then(responses => { // handle responses })