Which mode would you use to create a new file and write data to it?

The mode used to create a new file and write data to it is the write mode. When you open a file using write mode, if the file already exists, it will be truncated to zero length, meaning all existing data in the file will be erased. Conversely, if the file does not exist, it will be created. This makes it an ideal choice for tasks where you want to write fresh data into a file, ensuring that any previous content is removed.

In contrast, other modes do not serve this purpose as effectively. For instance, read mode only allows for reading existing data from a file and does not permit writing at all. The r+ mode allows both reading and writing but requires the file to already exist without truncating it initially. Append mode is used to add data to the end of an existing file without removing the current contents, making it unsuitable for creating a new file with fresh data. Therefore, w mode is specifically designed for the creation and writing of new files.