Q221. Details of students whose FirstName starts with 'K'?
To find records where a text column begins with a specific letter or prefix, use the **`LIKE`** operator with the `%` wildcard: ```sql SELECT * FROM Students WHERE FirstN...
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Q222. What is the purpose of <head> tag?
The `` tag in HTML is used to provide metadata about document, such as title of page, links and other information that is not directly displayed on the web page. This inf...
Q223. What is memoization?
Memoization is a functional programming technique which attempts to increase a function’s performance by caching its previously computed results. Each time a memoized fun...
Q224. What is children prop?
The `children` prop is a special prop in React used to pass elements between the opening and closing tags of a component. It is commonly used in layout and wrapper compon...
Q225. Which operator selects values in a range?
The **`BETWEEN`** operator selects values within an inclusive range (numbers, text strings, or dates): ```sql SELECT product_id, name, price FROM products WHERE price BET...
Q226. What is the purpose of the <meta> tag in HTML?
The `` tag is used to provide additional information about the webpage, such as author, keywords, description which is used by search engines to understand the content of...
Q227. What is the `keyof` operator in TypeScript?
The `keyof` operator in TypeScript is used to get a union type of all the keys (property names) of an object type. It allows you to access and use the keys of an object t...
Q228. How to write comments in React?
The comments in React/JSX are similar to JavaScript Multiline comments but are wrapped in curly braces. **Single-line comments:** ```jsx harmony {/* Single-line comments(...
Q229. How do you use v-for directive with a range?
You can also use integer type(say 'n') for `v-for` directive which repeats the element many times. ```javascript {{ n }} ``` It displays the number 1 to 20. ****
Q230. Correct syntax for date range?
```sql SELECT * FROM Sales WHERE Date BETWEEN '2017-12-01' AND '2018-01-01'; ``` Use ISO-8601 format (`YYYY-MM-DD`) to avoid locale issues.