Technical Question Bank · Peer-Reviewed
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### The Code Snippet: ```python def foo(x=[]): x.append(1) return x print(foo()) print(foo()) ``` ### Output: ```python [1] [1, 1] ``` ### Technical Explanation: In Pytho...
CSS selectors declare which HTML elements a set of CSS rules applies to: ### Selector Categories: 1. **Universal Selector (`*`)**: Matches every DOM element. 2. **Type / ...
You can perform browser support for server-sent events before using it as below, ```javascript if (typeof EventSource !== "undefined") { // Server-sent events supported. ...
The React team worked on extracting all DOM-related features into a separate library called _ReactDOM_. React v0.14 is the first release in which the libraries are split....
In Next.js Pages Router, the **Singleton Router** refers to the global, shared router instance exported by `next/router`: ```javascript import Router from 'next/router'; ...
Filters can be used to apply common text formatting. These Filters should be appended to the end of the JavaScript expression, denoted by the "pipe" symbol. You can use t...
DDL (CREATE, ALTER, DROP, TRUNCATE), DML (INSERT, UPDATE, DELETE, SELECT), DQL (SELECT — sometimes grouped with DML), DCL (GRANT, REVOKE), TCL (COMMIT, ROLLBACK, SAVEPOIN...
By specifying #!/usr/bin/pythonyou specify exactly which interpreter will be used to run the script on a particular system. This is the hardcoded path to the python inter...
The universal selector is a css selector that can be used to apply styles to all elements on a page or to reset styles for all elements to their default values
Below are the list of events available for server sent events | Event | Description | |---- | --------- | onopen | It is used when a connection to the server is opened | ...
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