Google Cloud Professional Cloud Developer Practice Test

The command you should use to upload files from an on-premises virtual machine to Google Cloud Storage is specifically designed for file manipulation within Google Cloud. The `gsutil` utility is part of the Google Cloud SDK and is specifically tailored for managing Cloud Storage. The correct command format with `gsutil cp` allows users to copy local files from a computing environment directly to a specified Cloud Storage bucket.

When you use the `cp` command with `gsutil`, you are invoking a command optimized for copying files and handling data transfer efficiently between your local environment and Cloud Storage. The syntax, `gsutil cp [LOCAL_OBJECT] gs://[DESTINATION_BUCKET_NAME]/`, clearly designates the source file on your local system and the destination bucket in the Cloud Storage, facilitating a straightforward and intuitive operation.

In contrast, other utility commands or tools mentioned in the options, such as `gcloud cp`, `hadoop fs cp`, and `gcloud dataproc cp`, are not designed for directly uploading files to Google Cloud Storage in the same context, leading to the conclusion that these would not be suitable for this specific operation.