COMPUTER WORKSHEET -STORAGE DEVICES

Storage Devices

Q1. Memory map
Main Memory
Primary Memory                   Secondary Memory
RAM       ROM            Removable                Non-Removable
                              CD,DVD,Pen Drive               Hard disc 

Q. II Fill in the blanks:
1. An optical disc can be read- write by using a laser beam.
2. A hard disk consists of many circular metallic plates layered with
magnetic material.
3. ROM is known as non-volatile memory.
4. Computer can understand only binary language.
5. The smallest unit of storage in a computer memory is bit.

Q. III Observe the pictures given below and complete the table:
Name CD              DVD                     BD
Storage Capacity
650 – 700 MB     4.7 – 17 GB      25 – 50 GB
Variations CD – R, CD - RW DVD – R,DVD - RW
BD – R, BD - RW

Q. IV Match the column:
Answers: 1. ___c__ 2. ___d___ 3. ___a___ 4. ___b___

3QV Some characters are listed below. Classify them according to their
respective memory :
RAM -volatile , stores the program being worked on.
data can be changed. Temporary memory
ROM-non-volatile, stores the start-up program
data put in during manufacture -Permanant memory

QVI Hard disc -Para1 Page 5           Pen Drive - Page8
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