Which of the following describes a partition table?

A partition table is a critical component of a hard drive's structure that provides essential information about the partitions on that drive. Each of the statements given highlights an important aspect of partition tables.

The first point emphasizes the specific location where the partition table is typically found. It is indeed located at cylinder 0, head 0, sector 1, which is a standard placement in the geometry of the disk drives, allowing the system to easily locate the partition table during the boot process.

The second point about the partition table being located in the master boot record (MBR) is also accurate. The MBR, which resides at the very beginning of a hard drive, contains both the boot loader and the partition table, thus playing a dual role in the startup and organization of a disk.

Lastly, the third statement relates to the function of the partition table, which is to keep track of the partitions on the drive. Each entry within the partition table details size, type, and location (starting and ending sectors) of the partitions, facilitating the operating system's ability to read from and write to the correct sections of the disk.

Since all the points accurately describe features of a partition table, the collective answer encompassing all these correct attributes is appropriate.