Page 9 - KEC Khaitan C4 Flipbook
P. 9
CHAPTER
A1
COMPUTER MEMORY
Learning Outcomes 95%
The student will be able to:
understand the concept of computer memory. learn about different types of computer memory.
learn about online storage.
UNDERSTANDING COMPUTER MEMORY
You know that computers take input as data and instructions and give output as
information. The entered input (data and instructions) and received output (information)
are stored inside a memory which is called computer memory. The data stored in the
computer can be stored for a long time and can be retrieved from the computer’s memory,
as and when required.
HOW IS MEMORY MEASURED IN A COMPUTER?
We use different units of measurement to measure anything, such as gram and kilogram
for measuring weight; metre and kilometre for distance; mililitre and kilolitre for liquid.
Similarly, the measurement unit or storage unit in which the computer stores information
is called memory unit. The basic unit for measuring the memory of a computer is the byte.
Byte: A combination of eight bits makes up a
byte. For example, 10001011, i.e., 1 byte equals The human brain can hold about 2.5
8 bits. petabytes of information, equivalent
to a TV show being played for
Bit: Data and information on a computer is approximately 342 years non stop.
stored in the form of 0s and 1s . These are called
binary digits or bits. A group of 4 bits is known
as a nibble (half byte).
Computer Memory 7

