Exam 312-49v10 topic 1 question 677 discussion

The correct answer is A. Signature word because the Master Boot Record (MBR) typically consists of the following components: Master boot code Partition table Signature word (also known as the boot signature) The signature word is a specific 2-byte value (0x55AA) at the end of the MBR that indicates the presence of a valid bootable disk. The disk signature (option D) is a unique identifier used by the operating system to distinguish between different disks, but it is not a fundamental component of the MBR structure as defined in the CHFI v10 textbook.

The structure of MBR consists of three parts: Master Boot Code or Boot Strap – It is an executable code and responsible for loading OS into computer memory. It consists of a data structure of 446 bytes. Partition Table – It maintains the data of all the hard disk partitions and consists of a data structure 64 bytes Disk Signature – It is located at the end of the MBR and contains only 2 bytes of data. It is required by BIOS during booting.

Disk Signature – It is located at the end of the MBR and contains only 2 bytes of data. It is required by BIOS during booting

D < https://www.sciencedirect.com/topics/computer-science/master-boot-record#:~:text=The%20MBR%20is%20comprised%20of,drive%20attached%20to%20a%20system.