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CA IPCC : Question Paper (with Answers) - INFORMATION TECHNOLOGY & STRATEGIC MANAGEMENT May 2011

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CA IPCC
Tilak Vidyalaya Higher Secondary School (TVHSS), Kallidaikurichi
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PAPER 7 : INFORMATION TECHNOLOGY AND STRATEGIC MANAGEMENT SECTION A : INFORMATION TECHNOLOGY Question No. 1 is compulsory Answer any five questions from the rest. Question 1 Answer all the following questions in brief: (a) Why a virtual memory in computer is required? (b) What is the importance of the clock speed in computers? (c) What do you understand by Message Switching ? (d) Explain the function of Arithmetic Logic Unit . (e) Differentiate between the File Volatility and the File Activity . (5 x 2=10 Marks) Answer (a) Virtual Memory:A programmer has to take into account the size of the memory to fit all his instructions and the data to be operated in the primary storage. If the program and the related data are larger than the capacity of the memory, then the programmer has to use the concept of virtual memory. Virtual memory systems, sometimes called virtual storage systems, extend primary memory by treating the secondary storage or disk storage as a logical extension of RAM or primary memory. The technique works by dividing a program on disk into pages or into logical variable length segments and calling the required page to memory whenever required. (b) Clock Speed:The clock speed is the speed at which the processor executes instructions. Clock speed is measured as a frequency in megahertz (MHz) or gigahertz (GHz) which is one million cycles per second or one billion cycles per second respectively. Higher the clock speed, the faster will be the processor with better system performance. (c) Message Switching:In this switching method, heavy volume of data is transmitted using special computer for the purpose of data transmission. The computer receives all transmitted data; stores it; and, when an outgoing communication line is available, forwards it to the receiving point. Thus, the whole message is transmitted in one go. (d) Arithmetic Logic Unit: The actual processing of the data and instructions are performed by arithmetic logic unit. It performs mathematical calculations, compares numeric and non-numeric values and makes decisions. The major operations performed by the ALU are addition, subtraction, multiplication, division, logic and comparison. Data flows between ALU and the storage unit during processing. Specifically, data is transferred as needed from the storage unit to the ALU,manipulated and returned to the storage unit. The Institute of Chartered Accountants of India

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