CD-ROMs and DVDs are examples of _____.

A. magnetic tapes

B. magnetic disks

C. optical discs

D. main memory devices

Answer: C. optical discs

An optical disc is a flat, circular disc that uses the techniques of optical storage to read, write, and interpret data. CD-ROMs and DVDs are examples of optical discs as they possess these features. These storage disks store data in a digital form and then utilize laser beams to read and write the data.

Programming

3 years ago

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Math Calculus — AID—

Total time spent: 4 hours 15 minutes (it is equivalent to 255 minutes). Let the flight time from Paris to Glasgow be X. Then the flight time from Glasgow to Paris will be (X+10). We have an equation with one unknown variable: X + 45 + (X+10) = 255 ⇒ X = 100 So the […]

What were the typical crafts for Maya?

Mayans are well-known as great pottery makers. They did not use the pottery wheel. However,the tecnique they used was coiling consecutive rings of clay on top of each other and smoothing the surface by hand. Also, they were good when it came to working with stone – stone craving is another important craft of Maya. Many […]

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Cigarette smoking causes emphysema.

Nearly everyone knows that smoking causes lung cancer, but did you know that smoking causes a number of other serious lung diseases? These include chronic bronchitis and emphysema, collectively known as chronic obstructive pulmonary disease (COPD). COPD is the fourth largest killer of Australians and smoking is the most important risk factor for COPD. When […]