Q971. What is CSS?
CSS stands for Cascading Style Sheets. CSS is used to define styles for web pages, including the design, layout and variations in display for different devices and screen...
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Q972. What is a callback hell?
Callback Hell is an anti-pattern with multiple nested callbacks which makes code hard to read and debug when dealing with asynchronous logic. The callback hell looks like...
Q973. What is React proptype array with shape?
If you want to pass an array of objects to a component with a particular shape then use `React.PropTypes.shape()` as an argument to `React.PropTypes.arrayOf()`. ```javasc...
Q974. What is static optimization in Next.js?
**Automatic Static Optimization** is a core Next.js feature where the build system automatically analyzes each page to determine whether it can be pre-rendered as pure st...
Q975. What are single file components?
Single File Components are an easy concept to understand. Earlier you might heard about all three parts(HTML, JavaScript and CSS) of your application kept in different co...
Q976. A subquery inside a subquery is called?
A subquery placed inside another subquery is called a **nested subquery** (or multi-level subquery): ```sql SELECT customer_name FROM customers WHERE customer_id IN ( SEL...
Q977. What is the output of the following Python program using global variable modification?
#!/usr/bin/python ```python def fun2(): ``` globalb print'b:',b b=33 print'globalb:',b b=100 fun2() print'boutsidefun2′,b Ans. Output: b:100 globalb:33 boutsidefun2:33
Q978. What are the possible ways to apply CSS styles to a web page?
There are three standard methods to apply CSS styling to an HTML document: ### 1. External Stylesheet (Recommended Standard): Link an external `.css` file in the `` using...
Q979. What are server-sent events?
Server-sent events (SSE) is a server push technology enabling a browser to receive automatic updates from a server via HTTP connection without resorting to polling. These...
Q980. How to conditionally apply class attributes?
You shouldn't use curly braces inside quotes because it is going to be evaluated as a string. ```jsx harmony ``` Instead you need to move curly braces outside (don't forg...