Q671. What is Vue instance?
Every Vue application works by creating a new Vue instance with the Vue function. Generally the variable vm (short for ViewModel) is used to refer Vue instance. You can c...
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Q672. Select all records where FirstName is "John"?
To retrieve all columns for records where `FirstName` equals 'John', combine `SELECT *` with a `WHERE` equality filter: ```sql SELECT * FROM Customers WHERE FirstName = '...
Q673. What is namespace in Python?
In Python, every name introduced has a place where it lives and can be hooked for. This is known as namespace. It is like a box where a variable name is mapped to the obj...
Q674. Can we display web page inside a webpage or is nesting of webpage possible?
**Yes**, nesting a webpage inside another webpage is possible in HTML using the **`` (Inline Frame)** element: ```html ``` ### Security Considerations & Clickjacking Defe...
Q675. Explain the concept of type assertion in TypeScript.
Type assertion in TypeScript is a way to tell the compiler the specific type of a value when it cannot be inferred automatically. It allows you to override the compiler's...
Q676. What is the purpose of the let keyword?
The `let` keyword in JavaScript is used to declare a **block-scoped local variable**. This means that variables declared with `let` are only accessible within the block, ...
Q677. What is React Fiber?
**React Fiber** is the **new reconciliation engine** in React, introduced in React 16. It’s a complete rewrite of React’s core algorithm(old stack-based algorithm) for re...
Q678. What is the `metadata` export in the App Router and how do you use it?
The App Router supports a `metadata` export (or `metadata.js/ts`) to define route-level metadata like title, description, open graph tags and robots. You can export a sta...
Q679. How do you achieve conditional group of elements?
You can achieve conditional group of elements(toggle multiple elements at a time) by applying **v-if** directive on `` element which works as invisible wrapper(no renderi...
Q680. OR vs AND?
`AND` requires ALL conditions to be true. `OR` requires ANY to be true. Use parentheses to control precedence — `AND` binds tighter than `OR`. ```sql -- Without parenthes...