Using JWT with long expiration times might seem like a convenient option for user experience, but it could pose a security risk. Storing plain text passwords is a severe security vulnerability. Implementing OAuth 2.0 for social login only might not be sufficient for all authentication needs. Using basic authentication over HTTP is not secure. A robust authentication strategy should consider security (option 1) without compromising user experience and

To perform an action once a Promise is settled, regardless of whether it's fulfilled or rejected, you can use the .finally() method. This method is called on the "completion" of a Promise. It's often used for cleanup operations.

Data can be written to a writable stream in Node.js using the write() method. This method allows you to write data to the stream, which can be a file, network connection, or any other writable destination. The pipe() method is used for piping data from a readable stream to a writable stream, and the other options are not the correct ways to write data to a writable stream.

When implementing indexing, factors to consider for mitigating the impact on write performance include selective indexing (indexing only the columns that are frequently queried), choosing an appropriate index maintenance strategy (e.g., periodic maintenance rather than immediate updates), and using index-only scans to reduce disk I/O during reads. Increasing the index size can have a negative impact on write performance, so it should be done judiciously.

To install a Node.js package globally, you should use the npm install -g command. This makes the package available for use across different projects. The other options may not work as expected or are not the recommended way to install packages globally.

To override ESLint rules for specific files or directories, you can create a .eslintignore file with patterns of the files or directories to be excluded from ESLint linting. The other options are not used for this purpose.

In Node.js, the 'data' event is emitted when data is available to read from a readable stream. This event allows you to consume the data as it becomes available. The other options are not standard events for this purpose.

In a sharded database architecture, a central coordinator (Option 2) often handles updates that affect multiple shards. Each shard (Option 3) independently handles updates for its own data, but coordinated updates across shards typically require a central component. Options 1 and 4 are not common methods for handling updates in sharded databases.

To efficiently extract specific properties from objects using destructuring assignment in JavaScript, you would use the syntax const { prop1, prop2 } = sourceObject;. This assigns the values of prop1 and prop2 from sourceObject to the corresponding variables. To handle non-existent properties, you can provide default values like const { prop1 = defaultValue1, prop2 = defaultValue2 } = sourceObject;. The other options are not correct ways to achieve this task.

A Distributed cache stores data in a shared location that can be accessed by multiple application instances. This allows multiple nodes of an application to share cached data, improving performance and reducing redundancy.

Readable Streams are used for reading data in Node.js. They allow you to read data from various sources, such as files, HTTP requests, and more, in a non-blocking and efficient manner.

In JavaScript, null represents the intentional absence of any value, while undefined indicates that a variable has been declared but has not been assigned a value. Understanding this difference is crucial for handling data in JavaScript effectively.