Q1231. What are the tools or techniques used for debugging JavaScript code?
You can use below tools or techniques for debugging javascript 1. Chrome Devtools 2. debugger statement 3. Good old console.log statement
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Q1232. What is Shallow Renderer in React testing?
_Shallow rendering_ is useful for writing unit test cases in React. It lets you render a component _one level deep_ and assert facts about what its render method returns,...
Q1233. How do you use placeholders with the next/image component?
Use `placeholder="blur"` with a `blurDataURL` or let Next.js generate it when importing static images. This shows a low-quality blurred preview while the image loads. ```...
Q1234. What are X Templates?
Apart from regular templates and inline templates, you can also define templates using a script element with the type `text/x-template` and then referencing the template ...
Q1235. Types of privileges?
1. **System privileges**: CREATE, DROP, ALTER (database-level) 2. **Object privileges**: SELECT, INSERT, UPDATE, DELETE, EXECUTE (table/procedure-level)
Q1236. Are Tuples immutable?
Yes, tuples in Python are **immutable**. Once created, their elements cannot be changed, added, or removed. Key implications: 1. **Hashability**: Tuples can be used as di...
Q1237. How do you delay the start of a CSS transition?
You can delay the start of a CSS transition using the transition-delay property. This property specifies the amount of time to wait before starting the transition, in sec...
Q1238. What are the pros and cons of promises over callbacks?
Below are the list of pros and cons of promises over callbacks, **Pros:** 1. It avoids callback hell which is unreadable 2. Easy to write sequential asynchronous code wit...
Q1239. What is `TestRenderer` package in React?
This package provides a renderer that can be used to render components to pure JavaScript objects, without depending on the DOM or a native mobile environment. This packa...
Q1240. How do you enable ISR (revalidation) in the App Router?
In the App Router you can control revalidation when fetching data by passing the `next` option to `fetch`. For example, to revalidate every 10 seconds: ```js const res = ...