Which sequence creates a new partition on a disk with a GPT label and a 1 GiB ext4 partition, then formats the partition as ext4?

• A. parted /dev/sdX mklabel gpt; parted -a optimal /dev/sdX mkpart primary ext4 0% 1GiB; mkfs.ext4 /dev/sdX1
• B. parted /dev/sdX mklabel msdos; parted -a optimal /dev/sdX mkpart primary ext4 0% 1GiB; mkfs.ext4 /dev/sdX1
• C. parted /dev/sdX mklabel gpt; parted -a minimal /dev/sdX mkpart primary ext4 0% 500MiB; mkfs.ext4 /dev/sdX1
• D. parted /dev/sdX mklabel gpt; parted -a optimal /dev/sdX mkpart primary xfs 0% 1GiB; mkfs.xfs /dev/sdX1

Answer: (A)

Creating a GPT-partitioned disk, then carving out a 1 GiB slice and formatting it as ext4 matches the steps needed to set up a new ext4 partition on a GPT disk.

First, establishing a GPT label sets the disk's partitioning scheme, which is required here. Then, using a partition command with optimal alignment and a range from 0% to 1GiB creates a partition that is exactly 1 GiB in size, using ext4 as the partition type label and ensuring proper boundary alignment. Finally, formatting that new partition with mkfs.ext4 applies the ext4 filesystem to /dev/sdX1, making it ready for use.

The other options fail because they either switch to a non-GPT label, use a different alignment mode or size, or format with a filesystem other than ext4.