Novell Certified Linux Professional (CLP) — Question 9

What is the result of the following command?
dd if=/dev/zero of=/dev/hdd bs=512 count=1

Answer options

• A. Writes zeros in the first 512 bytes of the first hard disk block
• B. Assigns the physical volume zero to the logical volume hdd
• C. Overwrites an existing partition table
• D. Creates a LVM partition of 512 blocks
• E. Backs up the /dev/zero and /dev/hdd files

Correct answer: A, C

Explanation

The correct answer is A because the command specifically writes zeros to the first 512 bytes of the specified output file. Option C is incorrect because the command does not manipulate partition tables; it writes directly to a block device.