Which of the following commands overwrites the bootloader located on /dev/sda without
overwriting the partition table or any data following it?
A.
dd if=/dev/zero of=/dev/sda bs=512
B.
dd if=/dev/zero of=/dev/sda bs=512 count=1
C.
dd if=/dev/zero of=/dev/sda bs=440 count=1
D.
dd if=/dev/zero of=/dev/sda bs=440
WRONG ANSWER! should be C-> dd if=/dev/zero of=/dev/sda bs=512 count=1
Because MBR has 512 and you need to put count=1, if not will copy until end of disc.
ISN’T IT??
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The correct answer is “dd if=/dev/zero of=/dev/sda bs=440 count=1” (C) because the bootloader size is 440 byte.
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a fagiano he was right the MBR is 512 byte for me the answer should be B
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read the Question correct! ….without
overwriting the partition table…..
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the answer is letter C. follow the link
https://unix.stackexchange.com/questions/254657/mbr-size-is-440-bytes-or-512-bytes
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512 also deletes the partition, the exact answer is 440.
Greetings.
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