OR questions

You can adjust salt rounds based on your server's capabilities. If performance is critical, start with a lower number, like 8, and gradually increase it as your system's performance improves. Monitor the hash time and user experience to find an optimal balance.

Yes, BcryptJS is suitable for modern applications due to its strong security features and adaptability. Its resistance to common attacks makes it a reliable choice for password hashing. Additionally, it integrates easily with Node.js applications, ensuring secure user authentication practices.

BcryptJS produces a string output that includes the algorithm identifier, cost factor, salt, and hash, formatted as `$2a$<cost>$<salt>$<hash>`. This format allows the library to extract the parameters during verification, ensuring consistent hash comparisons for security.

While BcryptJS is designed for password hashing, it can technically hash any data. However, it's optimized for passwords, and other hashing algorithms like SHA-256 may be more appropriate for data integrity checks or non-sensitive information due to performance considerations.

BcryptJS prevents brute force attacks by using adaptive hashing with configurable salt rounds, which increases the time it takes to compute a hash. This makes it more computationally expensive for attackers to try multiple passwords, enhancing overall security against such attacks.

Dynamic routing in Next.js is achieved by creating files with bracket notation in the `pages` directory, e.g., `[id].js`. These routes can capture dynamic values from the URL. Example: A blog post page `pages/post/[slug].js` captures the slug from the URL and fetches the corresponding blog post.

Next.js uses link prefetching to load pages in the background for faster navigation. When using the `Link` component, set the `prefetch` attribute to `true` (enabled by default), which helps to prefetch the resources for the linked page. Example: Hovering over a link starts preloading the page before clicking.

`getStaticProps` is used for static generation at build time, while `getServerSideProps` fetches data on each request for server-side rendering. Example: Use `getStaticProps` for static pages like blogs, and `getServerSideProps` for dynamic data that changes frequently, such as user-specific content.

A well-formed XML document adheres to the basic syntax rules of XML. These include the following: 1. It must have a single root element. 2. All elements must be properly closed. 3. Tags must be properly nested. 4. Attribute values must be enclosed in quotes. 5. It is case-sensitive. A well-formed XML document can be parsed correctly by an XML parser. 

 <book>
  <title>XML Basics</title>
  <author>John Doe</author>
</book>

A pointer in C is a variable that stores the memory address of another variable. Using pointers, we can directly manipulate memory. For example, 'int *p' declares a pointer 'p' to an integer. Pointers are useful for dynamic memory allocation and efficient array handling. 
 
int a = 10;
int *p = &a;
printf("Value: %d", *p);

In C, ++i is the pre-increment operator, meaning the value of 'i' is incremented first, then used. i++ is the post-increment operator, which means the current value of 'i' is used first, and only after that, 'i' is incremented. This distinction is important when used within expressions. 
 
int i = 5;
printf("%d", ++i); // Output: 6
printf("%d", i++); // Output: 6, but i becomes 7

The .xls format is a binary file format used by Excel 97-2003, whereas .xlsx is an XML-based format introduced in Excel 2007. The .xlsx format allows for larger files and enhanced features like improved data recovery and better compression. For example, .xlsx files typically use less disk space.

VLOOKUP is used to search for a value in the first column of a table and return a value in the same row from another column. For example, if you have a table with employee IDs and names, you can use VLOOKUP to find an employee's name using their ID.

To protect a worksheet, go to the 'Review' tab and click on 'Protect Sheet.' You can set a password to restrict editing and choose which actions users can perform. For example, you might want to allow users to select cells but not edit them, ensuring data integrity.

To sort data, select your range and go to the 'Data' tab. You can sort by one or multiple columns, either ascending or descending. For instance, sorting a list of products by price helps in quickly identifying the cheapest or most expensive items, streamlining decision-making.

The 'Color Lookup' adjustment allows for remapping image colors to match a specific color palette or style, using 3D LUTs (Look Up Tables).

Axios provides built-in error handling with promises. Use the `.catch()` method to capture errors or you can use a `try-catch` block in an async/await function. Axios errors include information such as the request, response, and configuration, making debugging easier. 
 
 axios.get('/user').catch(error => console.log(error));