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By Rajiv Khanna

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Detailed Answer Type Questions E. Answer the following questions in detail: 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. What is computer? For what purpose it is used? Name any three places, where computers can be used? Draw a block diagram of computer and label its component. Describe the role of keyboard and mouse in computer? What are the fundamental similarity and differences between them? Name any two output devices. What is the role of memory in computer? Name any two medium, which serve the purpose of permanent memory.

2 -1 2 -2 2 -3 2 -4 2 -5 ..... Binary Point Perform following steps to convert a binary number into equivalent decimal number: 1. Multiply each digit of the number, by its positional value. 2. Now add all the products to get the sum. The sum, thus obtained will be the equivalent decimal number of given binary number. To understand the procedure of conversion of binary numbers into equivalent decimal numbers, consider following examples: Example -6 Convert binary number (110111) 2 into equivalent decimal number.

17 3. Their terminal connectivity can go as high as 256 or beyond. 4. They possess large number of application libraries that provide great help to developers in developing useful applications. 14 Computer Application For Engineering DEC 20, IBM 370 etc. are the examples of few mainframes. IBM (USA) is the largest manufacturer of Mainframes. Supercomputers Supercomputer is the largest category of computers. They use multiple CPUs for processing the data and executing the instructions. While performing a task through Supercomputer, the complete task gets divided into multiple independent tasks.

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