INDEX 1. I/O Devices 1 2. Memory 19 3. Central Processing Unit 47 4. PC Hardware 59 5. Database Concepts 75 6. Review of C++ 90 7. Object Oriented Programming 109 8. Polymorphism 136 9. Inheritance 144 10. Files 167 UNIT I I/O DEVICES Data are entered in to the computer system by means of an input device. The keyboard is one of
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retrieve data much faster with primary memory compared to secondary memory. Primary memory is more expensive than secondary memory. Because of this the size of primary memory is less than that of secondary memory. Computer memory is used to store two things: i) instructions to execute a program and ii) data. When the computer is doing any job‚ the data that have to be processed are stored in the primary memory. This data may come from an input device like keyboard or from a secondary storage device like
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of a system visible to a programmer or‚ put another way‚ those attributes that have a direct impact on the logical execution of a program. Examples of architectural attributes include the instruction set‚ the number of bits used to represent various data types (e.g.‚ numbers‚ characters)‚ I/O mechanisms‚ and techniques for addressing memory. Computer Organization refers to the operational units and their interconnections that realize the architectural specifications. Examples of organizational attributes
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In order to replace human senses‚ computers needed input devices for perception and data entry. Since computers have been created‚ there have been many improvements to where they are now and I still believe there is much more to be done with computers. Although computers have their own brain they still do what humans tell them to do. Computers can solve problems and look up certain data‚ but it is all based upon what it is told to do by the operator. This leads me to the topic of what is still
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NETWORKING – PROS AND CONS A computer network can be identified as a group of computers that are interconnected for sharing data between them or their users. One main method for optimizing computer usage is networking. However‚ for those who are contemplating a change from stand-alone computers to a network system. Investigation of actual networks in use presents a paradox: network systems can be highly productive and beneficial‚ but they can create many complexes‚ frustrating problems. Simply
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motherboard is a printed circuit and is essentially the main core of and device. It distributes power to all the hardware components. • CPU – Register‚ ALU‚ control unit - The CPU is a type of processor which acts as the brains of a computer and is an important part of any computer. • ZIF socket - A ZIF socket is used to mount electronic devices and designed not to
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Definition Of Information System Information is an organized set of seemingly related data. A system is a method‚ or process‚ of grouping things together. You may or may not have wondered how these two terms have combined and what helps them work in near harmony. This video grouping will help you discover the components and processes that make up the early 21st century’s information system. Our formal definition of information systemsis the combining of users‚ technology and processes to complete
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deep impact on education. Computer education forms a part of the school and college curricula‚ as it is important for every individual today‚ to have the basic knowledge of computers. The advantages of computers in education include an efficient storage and rendition of information‚ quick information processing and very importantly the saving of paper. Know more about the importance of computer education. Computer teaching plays a key role in the modern systems of education. Students find it easier
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com computer Chapter INTRODUCTION TO COMPUTER IX One Q - 1) Define the term computer? or Define computer? Ans: Computer is an electronic and automatic device that accepts data and instruction (In form of program) as Input and process it and produces the results or information as Output. It has also capability to plug and play different devices. Q - 2) Define Hardware and Software? Hardware: The physical and tangible components forming a computer are called “Hardware”. It includes not only the computer
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electronic storage‚ it is used most often to identify fast‚ temporary forms of storage. If your computer’s CPU had to constantly access the hard drive to retrieve every piece of data it needs‚ it would operate very slowly. When the information is kept in memory‚ the CPU can access it much more quickly. Most forms of memory are intended to store data temporarily. As you can see in the diagram above‚ the CPU accesses memory according to a distinct hierarchy. Whether it comes from permanent storage (the
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