Introduction to C
1. Why are computers used? Brief their benefits.
Ans: Computers play a vital role in the socioeconomic progress of a country. Every nation is paying
great importance to computer literacy. Progress of individuals, surrounding region, nation and the world
is ensured only with the introduction and use of computers. In every occupation, computers are being
used increasingly. In every part of the world, computers are inducted to increase the overall productivity.
Moreover, the quality of the products due to the application of computers is substantially improved.
The impact of computers is very high on mass education, entertainment and productivity in all fields.
The use of computers reduces drastically the cost of production, saves a lot of time and ensures the best
In addition, the use of computer with some know-how (for the common users) and a lot of technical
innovations (by the developers), numerical problems, business transactions and scientific applications
can be computed in almost no time. A computer does various tasks based on the programs installed
in it. Intellectual computer is certainly a powerful gadget, but human intellectual capability is much
higher than that of a computer. Thus, computer does not have its own brain. Brainpower of computer
is limited. Thus, human intellectual power is further reinforced by the use of computers frequently in
the day-to-day life. By learning computer-programming languages, developing software packages and
understanding and developing hardware of computers, one can make life and the nation economically
2. Illustrate the functions of various parts of a computer.
Ans: Computer is a programmable electronic machine that accepts instructions and data through
input devices, manipulating data according to instructions and providing finally result to the output
device. The result can be stored in memory or sent to the output device. Figure 1.1 shows the block
diagram of a conventional computer.
M01_ITL-ESL4791_02_SE_C01.indd 3 12/22/2012 4:59:18 PM