BCA 1st Year Introduction to Computer Notes Study Material
Semester Wise BCA 1st Year Introduction to Computer Notes Study Material: If you choose to do a Bachelor of Computer Application, it is BCA. BCA is a three-year program in most universities. After getting enrolled for BCA, There are certain things you require the most to get better grades/marks in BCA. Out of those, there are BCA Notes and BCA Semester Wise Notes Study Material, BCA Question Answers along with BCA Previous Year Papers. At gurujistudy.com you can easily get all these study materials and notes for free.
If you are a BCA Student there is a single-stop destination as far as preparation for BCA Examination is concerned. Here in this post, we are happy to provide you with Topic Wise & Chapter Wise BCA 1st Year Introduction to Computer Notes Study Material.
BCA 1st Year Introduction to Computer Notes Study Material
Introduction of Computers: Computer application is the study of the operating principles of computers, programming languages of computers, and algorithms (and/or flowcharts) for solving problems. It involves the development and use of computer-related devices for data processing.
It is very difficult to imagine a day that is not in some way affected by computers. Computers are. changing people’s lives in areas such as publishing, business, medicine, education, the home, transportation, etc.
Definitions
“Computer is an electronic device, which is capable of solving problems and manipulating data”.
Or
“Computer is an electronic device that executes the instructions of a program”.
Or
“A computer is a combination of electronic and electromechanical equipment capable of solving problems by automatically accepting and storing input data, processing them and producing output results under the direction of a detailed step-by-step stored program of instructions”.
Basic Functions of a Computer
The basic functions of a computer are shown in the figure below.
1. Inputting: It is the process of entering data and instructions into the computer system.
2. Storing: Saving data and instructions (typically on secondary storage devices like Hard Disk, and Floppy Disk) so that they are available for initial or for additional processing as and when required.
3. Processing: Processing means performing arithmetic operations or logical operations on data in order to convert it into useful information.
4. Outputting: Outputting is the process of producing useful information or results for the user, such as a printed report or visual display.
5. Controlling: Controlling means directing the manner and sequence in which all of the above operations are performed.
Characteristics of a Computer
The power and usefulness of the computer are mainly due to its following characteristics:
1. Automatic: Computers are automatic machines because once started on a job, they carry on until the job is finished, normally without any human assistance.
2. Speed: A computer is a very fast device. It takes only a few seconds for calculations that we take hours to complete. A powerful computer is capable of performing several billion (109) simple arithmetic operations per second. So, we determine the speed of the computer in terms of microseconds (10-6) or nanoseconds (10-9).
3. Accuracy: A computer is very accurate. The accuracy of a computer is consistently high and the degree of accuracy of a particular computer depends upon its design.
4. Diligence: Unlike human beings, a computer is free from tiredness and lack of concentration. It can continuously work for hours, without creating any errors.
5. Versatility: It means the capacity to perform completely different types of work. You may use your computer to prepare payroll slips. Next moment you may use it for inventory management or to prepare a letter.
6. Power of Remembering: A computer can store and recall any amount of information because of its secondary storage capability.
7. No Feelings: It does not have feelings or emotions, taste, knowledge, and experience. Thus, it does not get tired even after long hours of work.
8. No 1.Q.: A computer is a dumb machine and it cannot do any work without instructions from the user. It is up to you to decide what you want to do and in what sequence.
So, a computer cannot take its own decision as you can.
Limitations of a Computer
Nearly everyone has at some time found an error in a computer-generated bill. If we have to truly understand computers and how to integrate them into our lives, we must understand their limitations as well as their strengths. Computer “mistakes” generally fall into one of four categories:
1. Hardware errors which are genuine computer mistakes.
2. Input errors or mistakes in entering data.
3. Software errors or mistakes in programming the computer.
4. Output errors or mistakes in interpreting outputs.
The later three are not computer mistakes but human errors.
BCA 1st Year Introduction to Computer Notes Study Material
Chapter Wise BCA 1st Year Computer Fundamentals and Office Automation Notes Study Material