Which function is used as the date wrapper in MongoDB?

The function used as the date wrapper in MongoDB is ISODate(). This function is integral in working with date and time data types within the database. When you use ISODate(), it creates a date object that conforms to the ISO 8601 standard, which is particularly useful for storing and querying date information in a consistent format across different systems and programming languages.

ISODate() allows MongoDB to understand and manipulate date values effectively during operations like queries, aggregations, and indexing. It ensures that dates and times are parsed and displayed correctly, which is essential for various applications that rely on accurate time data.

Other options provided do not represent valid functions in MongoDB for creating date objects. For instance, getDate() is a method associated with JavaScript and may be used in scripting contexts but does not apply as a date wrapper in MongoDB directly. Likewise, dateWrapper() and DateFormat() are not recognized functions in MongoDB, so they wouldn’t serve the purpose of wrapping date values appropriately within the database context.