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Unformatted text preview: he program being executed.
What are the five basic operations performed by any computer system?
Draw a block diagram to illustrate the basic organization of a computer system and
explain the functions of the various units.
What is an input interface? How does it differ from an output interface?
How many types of storage are normally there in the storage unit of a computer
system? Justify the need for each storage type.
Differentiate between the characteristics of the primary storage and the secondary
storage of a computer system.
What are the basic components of the CPU of a computer system? Describe the
roles of each of the components in the functioning of a computer system.
List out the logical steps taken by a computer system along with the roles of the
main units of the computer system in each step while transforming an input data to useful
information for presentation to the user.
What is a system? Why is a computer often referred to as a computer system? Chapter 3
We have already seen in the previous chapter that inside a computer system, data is
stored in a format that cannot be easily read by human beings. This is the reason why
input and output (I/O) interfaces are required. Every computer stores numbers, letters,
and other special characters in a coded form. Before going into the details of these codes,
it is essential to have a basic understanding of the number system. So the goal of this
chapter is to familiarize you with the basic fundamentals of number system. It also
introduces some of the commonly used number systems by computer professionals and
the relationship among them.
NON-POSITIONAL NUMBER SYSTEMS
Number systems are basically of two types: non-positional and positional. In early days,
human beings counted on fingers. When ten fingers were not adequate, stones, pebbles,
or sticks were used to indicate values. This method of counting uses an additive approach
or the non-positional number system. In this system, we have symbols such as I for 1, II
for 2, III for 3, IIII for 4, IIIII for 5, etc. Each symbol represents the same value
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- Spring '14