circuits, and system programs. Typically the term does not refer to application programs, such as spreadsheets or word processing, which are required to perform a task but not to make the system run. In designing a computer system, architects consider five major elements that make up the system's hardware: the arithmetic/logic unit, control unit, memory, input, and output. The arithmetic/logic unit performs arithmetic and compares numerical values. The control unit directs the operation
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with operational roles need information to help them carry out their duties. As a result, businesses tend to have several "information systems" operating at the same time. There are various types of information systems, for example: transaction processing systems, office systems, decision support systems, knowledge management systems, database management systems, and office information systems.
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divides the input and/or output data of a software unit into partitions of data from which test cases can be derived. The equivalence partitions are usually derived from the requirements specification for input attributes that influence the processing of the test object. Test cases are designed to cover each partition at least once. Using equivalence partitioning • Equivalence partitioning technique uncovers classes of errors. • Testing uncovers sets of inputs that causes
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manipulate disseminate f eedback Components of an IS ? Input (I/P) ¨ the activity of collecting, capturing or gathering of raw data. E.g to produce a paycheck for an em ployee ? No. of hours work, h ourly r at e ¨ can be m anual or autom atic ¨ input device i.e. scanner, keyboard etc.. 2 Components of an IS ¡ c o n t¡ ? Process ¨ the activity of manipulating, converting or transforming data into useful outputs. ¨ involves calculations or com parisons ¨ E.g to produce
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Q. where are programs and data to be used by the computer available? 1 2 3 4 Output Processing unit Input Storage Ans: 4 Q. A parallel port is most often used by a 1 2 3 4 Mouse Monitor Printer External storage device Ans: 3 Q. Computer follows a simple principle called GIGO which means: 1 2 3 4 Garbage in garbage out Garbage input good output Good input good output Greater instructions greater output Ans: 1 Q. Arrange the following devices in ascending order of the speed: A. RAM B. Hard disk C.
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Component 01 - Computing Principles | AS-Level (H046) | A-Level (H446) | 1 The characteristics of contemporary processors, input, output and storage devices | Structure and function of the processor | The Arithmetic and Logic Unit (ALU), Control Unit and registers: Program Counter (PC), Accumulator (ACC), Memory Address Register (MAR), Memory Data Register (MDR), Current Instruction Register (CIR).Buses: data, address and control: How this relates to assembly language programs.The fetch-decode-execute
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important as their applications exist in a broad variety of fields. The processes and ideas related to waveforms play a vital role in different areas of science and technology such as communications, optics, quantum mechanics, aeronautics, image processing to name a few. Even though the physical nature of signals might be completely different in various disciplines, all waveforms follow one fundamental principle; they can be represented by functions of one or more independent variables. This paper
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to understand the steps at hand, as stated before. Parts of a flow chart include the variables, input and output. The variables being storage locations in memory for data, the output being the data is generated and displayed, and input being the data that a program receives. Computer programs typically follow these three steps: Input is received, some process is performed on the input, and the output is produced. Pseudo-code is composed of sentences, clauses and words. It follows a structured pattern
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that controls and manages the hardware and other software on a computer. Every general-purpose computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing inputfrom the keyboard, sending output to the display screen, keeping track of filesand directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system has even greater responsibilities and powers. It is like a traffic
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Input and Output Devices The devices which are used to input the data and the programs in the computer are known as "Input Devices". or Input device can read data and convert them to a form that a computer can use. Output Device can produce the final product of machine processing into a form usable by humans. It provides man to machine communication. Before a computer can process your data, you need some method to input the data into the machine. The device you use will depend on what form this
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