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To Sum Up
Storage devices are used to store data and information for future use.
Magnetic disk is covered with a magnetic coating.
An optical disc is an electronic data storage medium that can be used to write
and read using a low-powered laser beam.
The Flash Drive is a small portable data storage device integrated with a USB
(Universal Serial Bus) connector.
The basic unit for measuring the memory of a computer is byte.
Other units for measuring the computer’s memory are kilobyte, megabyte,
gigabyte, terabyte, and so on.
Exercise
Section A (Objective)
A. Tick () the correct option.
1. Which of the following is known as the main memory of the computer?
a. Secondary b. Read Only
c. Primary d. Random Access
2. Which of the following is called non-volatile memory?
a. DRAM b. ROM
c. RAM d. SRAM
3. How many megabytes are there in one gigabyte?
a. 1056 b. 1032
c. 1024 d. 1000
4. A group of ......................... is called nibble.
a. 4 bits b. 8 bits
c. 2 bits d. 6 bits
B. Fill in the blanks using the words given below.
Hints: Optical Disc, Zettabyte, USB, Byte
1. External hard disks can be connected with the help of ......................... ports.
2. The basic unit of measuring the computer memory is called ......................... .
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Computers—Storage and Memory Device

