Question: 4 9 According to the lecture, how does a hard disk's read / write nead function? By using a laser to retrieve data from optical

49 According to the lecture, how does a hard disk's read/write nead
function?
By using a laser to retrieve data from optical disks
By scanning a spinning disk to record or access data using
electromagnetic charges
By compressing dat before writing to the disk
By directly accessing stored data in flash memory
4 9 According to the lecture, how does a hard

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