Q911. Is JavaScript faster than server side script?
Yes, JavaScript is faster than server side scripts. Because JavaScript is a client-side script it does not require any web server’s help for its computation or calculatio...
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Q912. Why is normalized state important for performance?
1. **O(1) lookups by ID** instead of scanning/`find()`-ing through an array every time a component needs one item. 2. **Updates are localized**: changing one entity only ...
Q913. How do we convert the string to lowercase?
In Python, call the **`.lower()`** string method: ```python title = "Data Engineering INTERVIEW" clean_title = title.lower() print(clean_title) # "data engineering interv...
Q914. How do you get the status of a checkbox?
You can apply the `checked` property on the selected checkbox in the DOM. If the value is `true` it means the checkbox is checked, otherwise it is unchecked. For example,...
Q915. What is Redux middleware?
**Middleware** provides a way to extend Redux with custom logic that runs **between dispatching an action and the moment it reaches the reducer**. It's the standard exten...
Q916. What is the purpose of double tilde operator?
The double tilde operator (`~~`) in JavaScript is known as the **double bitwise NOT operator**. It is commonly used as a shorthand idiom to truncate a floating-point numb...
Q917. What is the Redux middleware signature?
Middleware is written as **three nested (curried) functions**: ```javascript const exampleMiddleware = (store) => (next) => (action) => { // store => { getState, dispatch...
Q918. How do you convert character to ASCII code?
You can use the `String.prototype.charCodeAt()` method to convert string characters to ASCII numbers. For example, let's find ASCII code for the first letter of 'ABC' str...
Q919. What happens when you dispatch an action?
1. `store.dispatch(action)` is called with a plain action object (`{ type, payload }`). 2. The action passes through the **middleware chain** in order (e.g., logger → thu...
Q920. What is ArrayBuffer?
An ArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer. You can create it as below, ```javascript let buffer = new ArrayBuffer(16); // ...